Quero ter um grupo UITableView com o mesmo estilo da visualização de detalhes do aplicativo Configurações do iPad para iOS 7 .
É uma tableView com canto arredondado. Verifique o anexo para obter detalhes.
Existem algumas configurações padrão para que fique assim ou precisamos fazer algum desenho personalizado para o mesmo.
Qualquer dica na direção certa será apreciada.
obrigado
Respostas:
Eu fui em frente e customizei ainda mais o willDisplayCell para obter uma simulação melhor dos estilos de célula no aplicativo de configurações.
Objective-C
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
if ([cell respondsToSelector:@selector(tintColor)]) {
if (tableView == self.tableView) {
CGFloat cornerRadius = 5.f;
cell.backgroundColor = UIColor.clearColor;
CAShapeLayer *layer = [[CAShapeLayer alloc] init];
CGMutablePathRef pathRef = CGPathCreateMutable();
CGRect bounds = CGRectInset(cell.bounds, 10, 0);
BOOL addLine = NO;
if (indexPath.row == 0 && indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1) {
CGPathAddRoundedRect(pathRef, nil, bounds, cornerRadius, cornerRadius);
} else if (indexPath.row == 0) {
CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds));
CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds), CGRectGetMidX(bounds), CGRectGetMinY(bounds), cornerRadius);
CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius);
CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds));
addLine = YES;
} else if (indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1) {
CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds));
CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds), CGRectGetMidX(bounds), CGRectGetMaxY(bounds), cornerRadius);
CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius);
CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds));
} else {
CGPathAddRect(pathRef, nil, bounds);
addLine = YES;
}
layer.path = pathRef;
CFRelease(pathRef);
layer.fillColor = [UIColor colorWithWhite:1.f alpha:0.8f].CGColor;
if (addLine == YES) {
CALayer *lineLayer = [[CALayer alloc] init];
CGFloat lineHeight = (1.f / [UIScreen mainScreen].scale);
lineLayer.frame = CGRectMake(CGRectGetMinX(bounds)+10, bounds.size.height-lineHeight, bounds.size.width-10, lineHeight);
lineLayer.backgroundColor = tableView.separatorColor.CGColor;
[layer addSublayer:lineLayer];
}
UIView *testView = [[UIView alloc] initWithFrame:bounds];
[testView.layer insertSublayer:layer atIndex:0];
testView.backgroundColor = UIColor.clearColor;
cell.backgroundView = testView;
}
}
}Rápido
override func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
if (cell.respondsToSelector(Selector("tintColor"))){
if (tableView == self.tableView) {
let cornerRadius : CGFloat = 12.0
cell.backgroundColor = UIColor.clearColor()
var layer: CAShapeLayer = CAShapeLayer()
var pathRef:CGMutablePathRef = CGPathCreateMutable()
var bounds: CGRect = CGRectInset(cell.bounds, 25, 0)
var addLine: Bool = false
if (indexPath.row == 0 && indexPath.row == tableView.numberOfRowsInSection(indexPath.section)-1) {
CGPathAddRoundedRect(pathRef, nil, bounds, cornerRadius, cornerRadius)
} else if (indexPath.row == 0) {
CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds))
CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds), CGRectGetMidX(bounds), CGRectGetMinY(bounds), cornerRadius)
CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius)
CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds))
addLine = true
} else if (indexPath.row == tableView.numberOfRowsInSection(indexPath.section)-1) {
CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds))
CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds), CGRectGetMidX(bounds), CGRectGetMaxY(bounds), cornerRadius)
CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius)
CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds))
} else {
CGPathAddRect(pathRef, nil, bounds)
addLine = true
}
layer.path = pathRef
layer.fillColor = UIColor(red: 255/255.0, green: 255/255.0, blue: 255/255.0, alpha: 0.8).CGColor
if (addLine == true) {
var lineLayer: CALayer = CALayer()
var lineHeight: CGFloat = (1.0 / UIScreen.mainScreen().scale)
lineLayer.frame = CGRectMake(CGRectGetMinX(bounds)+10, bounds.size.height-lineHeight, bounds.size.width-10, lineHeight)
lineLayer.backgroundColor = tableView.separatorColor.CGColor
layer.addSublayer(lineLayer)
}
var testView: UIView = UIView(frame: bounds)
testView.layer.insertSublayer(layer, atIndex: 0)
testView.backgroundColor = UIColor.clearColor()
cell.backgroundView = testView
}
}
}Swift 3
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
let cornerRadius: CGFloat = 5
cell.backgroundColor = .clear
let layer = CAShapeLayer()
let pathRef = CGMutablePath()
let bounds = cell.bounds.insetBy(dx: 20, dy: 0)
var addLine = false
if indexPath.row == 0 && indexPath.row == tableView.numberOfRows(inSection: indexPath.section) - 1 {
pathRef.__addRoundedRect(transform: nil, rect: bounds, cornerWidth: cornerRadius, cornerHeight: cornerRadius)
} else if indexPath.row == 0 {
pathRef.move(to: .init(x: bounds.minX, y: bounds.maxY))
pathRef.addArc(tangent1End: .init(x: bounds.minX, y: bounds.minY), tangent2End: .init(x: bounds.midX, y: bounds.minY), radius: cornerRadius)
pathRef.addArc(tangent1End: .init(x: bounds.maxX, y: bounds.minY), tangent2End: .init(x: bounds.maxX, y: bounds.midY), radius: cornerRadius)
pathRef.addLine(to: .init(x: bounds.maxX, y: bounds.maxY))
addLine = true
} else if indexPath.row == tableView.numberOfRows(inSection: indexPath.section) - 1 {
pathRef.move(to: .init(x: bounds.minX, y: bounds.minY))
pathRef.addArc(tangent1End: .init(x: bounds.minX, y: bounds.maxY), tangent2End: .init(x: bounds.midX, y: bounds.maxY), radius: cornerRadius)
pathRef.addArc(tangent1End: .init(x: bounds.maxX, y: bounds.maxY), tangent2End: .init(x: bounds.maxX, y: bounds.midY), radius: cornerRadius)
pathRef.addLine(to: .init(x: bounds.maxX, y: bounds.minY))
} else {
pathRef.addRect(bounds)
addLine = true
}
layer.path = pathRef
layer.fillColor = UIColor(white: 1, alpha: 0.8).cgColor
if (addLine == true) {
let lineLayer = CALayer()
let lineHeight = 1.0 / UIScreen.main.scale
lineLayer.frame = CGRect(x: bounds.minX + 10, y: bounds.size.height - lineHeight, width: bounds.size.width - 10, height: lineHeight)
lineLayer.backgroundColor = tableView.separatorColor?.cgColor
layer.addSublayer(lineLayer)
}
let testView = UIView(frame: bounds)
testView.layer.insertSublayer(layer, at: 0)
testView.backgroundColor = .clear
cell.backgroundView = testView
}Swift 4.2
override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
if (cell.responds(to: #selector(getter: UIView.tintColor))){
if tableView == self.tableView {
let cornerRadius: CGFloat = 12.0
cell.backgroundColor = .clear
let layer: CAShapeLayer = CAShapeLayer()
let path: CGMutablePath = CGMutablePath()
let bounds: CGRect = cell.bounds
bounds.insetBy(dx: 25.0, dy: 0.0)
var addLine: Bool = false
if indexPath.row == 0 && indexPath.row == ( tableView.numberOfRows(inSection: indexPath.section) - 1) {
path.addRoundedRect(in: bounds, cornerWidth: cornerRadius, cornerHeight: cornerRadius)
} else if indexPath.row == 0 {
path.move(to: CGPoint(x: bounds.minX, y: bounds.maxY))
path.addArc(tangent1End: CGPoint(x: bounds.minX, y: bounds.minY), tangent2End: CGPoint(x: bounds.midX, y: bounds.minY), radius: cornerRadius)
path.addArc(tangent1End: CGPoint(x: bounds.maxX, y: bounds.minY), tangent2End: CGPoint(x: bounds.maxX, y: bounds.midY), radius: cornerRadius)
path.addLine(to: CGPoint(x: bounds.maxX, y: bounds.maxY))
} else if indexPath.row == (tableView.numberOfRows(inSection: indexPath.section) - 1) {
path.move(to: CGPoint(x: bounds.minX, y: bounds.minY))
path.addArc(tangent1End: CGPoint(x: bounds.minX, y: bounds.maxY), tangent2End: CGPoint(x: bounds.midX, y: bounds.maxY), radius: cornerRadius)
path.addArc(tangent1End: CGPoint(x: bounds.maxX, y: bounds.maxY), tangent2End: CGPoint(x: bounds.maxX, y: bounds.midY), radius: cornerRadius)
path.addLine(to: CGPoint(x: bounds.maxX, y: bounds.minY))
} else {
path.addRect(bounds)
addLine = true
}
layer.path = path
layer.fillColor = UIColor.white.withAlphaComponent(0.8).cgColor
if addLine {
let lineLayer: CALayer = CALayer()
let lineHeight: CGFloat = 1.0 / UIScreen.main.scale
lineLayer.frame = CGRect(x: bounds.minX + 10.0, y: bounds.size.height - lineHeight, width: bounds.size.width, height: lineHeight)
lineLayer.backgroundColor = tableView.separatorColor?.cgColor
layer.addSublayer(lineLayer)
}
let testView: UIView = UIView(frame: bounds)
testView.layer.insertSublayer(layer, at: 0)
testView.backgroundColor = .clear
cell.backgroundView = testView
}
}
}
[UIBezierPath bezierPathWithRoundedRect:bounds byRoundingCorners:corner cornerRadii:cornerSize];
No iOS 13 e superior, este estilo de tabela é finalmente disponibilizado pela Apple, sem a necessidade de reengenharia, com o novo estilo de visualização de tabela UITableView.Style.insetGrouped .
No Xcode 11 e superior, isso pode ser definido nas configurações do construtor de interface para a visualização da tabela, selecionando Inset Grouped para o Estilo:
Respondendo @NarasimhaiahKolli, sobre como eu defino a visualização do plano de fundo da célula para que toda a célula não pareça estar destacada. Espero que isto ajude.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
InfoCell *cell;
...
if ([cell respondsToSelector:@selector(tintColor)]) {
cell.selectedBackgroundView = [self backgroundCellView:cell indexPath:indexPath tableView:tableView];
}
return cell;
}
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
if ([cell respondsToSelector:@selector(tintColor)]) {
cell.backgroundColor = UIColor.clearColor;
UIColor *cellColor = [UIColor colorWithWhite:0.90f alpha:.95f];
CAShapeLayer *layer = [self tableView:tableView layerForCell:cell forRowAtIndexPath:indexPath withColor:cellColor];
CGRect bounds = CGRectInset(cell.bounds, 10, 0);
UIView *testView = [[UIView alloc] initWithFrame:bounds];
[testView.layer insertSublayer:layer atIndex:0];
testView.backgroundColor = UIColor.clearColor;
cell.backgroundView = testView;
}
}
- (UIView *)backgroundCellView:(InfoCell *)cell indexPath:(NSIndexPath *)indexPath tableView:(UITableView *)tableView
{
UIColor *cellColor = [UIColor lightGrayColor];
CAShapeLayer *layer = [self tableView:tableView layerForCell:cell forRowAtIndexPath:indexPath withColor:cellColor];
CGRect bounds = CGRectInset(cell.bounds, 10, 0);
UIView *testView = [[UIView alloc] initWithFrame:bounds];
[testView.layer insertSublayer:layer atIndex:0];
return testView;
}
- (CAShapeLayer *)tableView:(UITableView *)tableView layerForCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath withColor:(UIColor *)color
{
CGFloat cornerRadius = 5.f;
CAShapeLayer *layer = [[CAShapeLayer alloc] init];
CGMutablePathRef pathRef = CGPathCreateMutable();
CGRect bounds = CGRectInset(cell.bounds, 10, 0);
BOOL addLine = NO;
if (indexPath.row == 0 && indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1) {
CGPathAddRoundedRect(pathRef, nil, bounds, cornerRadius, cornerRadius);
} else if (indexPath.row == 0) {
CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds));
CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds), CGRectGetMidX(bounds), CGRectGetMinY(bounds), cornerRadius);
CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius);
CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds));
addLine = YES;
} else if (indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1) {
CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds));
CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds), CGRectGetMidX(bounds), CGRectGetMaxY(bounds), cornerRadius);
CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius);
CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds));
} else {
CGPathAddRect(pathRef, nil, bounds);
addLine = YES;
}
layer.path = pathRef;
CFRelease(pathRef);
// layer.fillColor = [UIColor colorWithWhite:1.f alpha:1.0f].CGColor;
layer.fillColor = color.CGColor;
if (addLine == YES) {
CALayer *lineLayer = [[CALayer alloc] init];
CGFloat lineHeight = (1.f / [UIScreen mainScreen].scale);
lineLayer.frame = CGRectMake(CGRectGetMinX(bounds)+10, bounds.size.height-lineHeight, bounds.size.width-10, lineHeight);
lineLayer.backgroundColor = tableView.separatorColor.CGColor;
[layer addSublayer:lineLayer];
}
return layer;
}A resposta de @jvanmetre é ótima e funciona. Construindo em cima dele e conforme sugerido por @SergiySalyuk nos comentários. Eu atualizei o código para usar UIBezierPath, tornando-o mais simples de entender e um pouco mais rápido.
Minha versão também corrige o bug do separador e adiciona uma visão de plano de fundo selecionada que se ajusta à célula.
Lembre-se de definir a visualização da tabela sem separador: tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
Objective-C
- (void)tableView:(UITableView*)tableView willDisplayCell:(UITableViewCell*)cell forRowAtIndexPath:(NSIndexPath*)indexPath {
// Set transparent background so we can see the layer
cell.backgroundColor = UIColor.clearColor;
// Declare two layers: one for the background and one for the selecetdBackground
CAShapeLayer *backgroundLayer = [CAShapeLayer layer];
CAShapeLayer *selectedBackgroundLayer = [[CAShapeLayer alloc] init];
CGRect bounds = CGRectInset(cell.bounds, 0, 0);//Cell bounds feel free to adjust insets.
BOOL addSeparator = NO;// Controls if we should add a seperator
// Determine which corners should be rounded
if (indexPath.row == 0 && indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1) {
// This is the only row in its section, round all corners
backgroundLayer.path = [UIBezierPath bezierPathWithRoundedRect:bounds byRoundingCorners:UIRectCornerAllCorners cornerRadii:CGSizeMake(7, 7)].CGPath;
} else if (indexPath.row == 0) {
// First row, round the top two corners.
backgroundLayer.path = [UIBezierPath bezierPathWithRoundedRect:bounds byRoundingCorners:UIRectCornerTopLeft | UIRectCornerTopRight cornerRadii:CGSizeMake(7, 7)].CGPath;
addSeparator = YES;
} else if (indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1) {
// Bottom row, round the bottom two corners.
backgroundLayer.path = [UIBezierPath bezierPathWithRoundedRect:bounds byRoundingCorners:UIRectCornerBottomLeft | UIRectCornerBottomRight cornerRadii:CGSizeMake(7, 7)].CGPath;
} else {
// Somewhere between the first and last row don't round anything but add a seperator
backgroundLayer.path = [UIBezierPath bezierPathWithRect:bounds].CGPath;// So we have a background
addSeparator = YES;
}
// Copy the same path for the selected background layer
selectedBackgroundLayer.path = CGPathCreateCopy(backgroundLayer.path);
// Yay colors!
backgroundLayer.fillColor = [UIColor colorWithWhite:1.f alpha:0.8f].CGColor;
selectedBackgroundLayer.fillColor = [UIColor grayColor].CGColor;
// Draw seperator if necessary
if (addSeparator == YES) {
CALayer *separatorLayer = [CALayer layer];
CGFloat separatorHeight = (1.f / [UIScreen mainScreen].scale);
separatorLayer.frame = CGRectMake(CGRectGetMinX(bounds)+10, bounds.size.height-separatorHeight, bounds.size.width-10, separatorHeight);
separatorLayer.backgroundColor = tableView.separatorColor.CGColor;
[backgroundLayer addSublayer:separatorLayer];
}
// Create a UIView from these layers and set them to the cell's .backgroundView and .selectedBackgroundView
UIView *backgroundView = [[UIView alloc] initWithFrame:bounds];
[backgroundView.layer insertSublayer:backgroundLayer atIndex:0];
backgroundView.backgroundColor = UIColor.clearColor;
cell.backgroundView = backgroundView;
UIView *selectedBackgroundView = [[UIView alloc] initWithFrame:bounds];
[selectedBackgroundView.layer insertSublayer:selectedBackgroundLayer atIndex:0];
selectedBackgroundView.backgroundColor = UIColor.clearColor;
cell.selectedBackgroundView = selectedBackgroundView;
}Eu estava tentando obter a mesma aparência arredondada do aplicativo Configurações nas células tableview. Minha resposta também é baseada em uma resposta do SO sobre como definir cornerRadius apenas para o canto superior esquerdo e superior direito de um UIView. .
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
[cell setClipsToBounds:YES];
// rowsArray has cell titles for current group
NSArray *rowsArray = [self.sectionsArray objectAtIndex:indexPath.section];
[[cell textLabel] setText:[rowsArray objectAtIndex:indexPath.row]];
float cornerSize = 11.0; // change this if necessary
// round all corners if there is only 1 cell
if (indexPath.row == 0 && [rowsArray count] == 1) {
UIBezierPath *maskPath;
maskPath = [UIBezierPath bezierPathWithRoundedRect:cell.bounds byRoundingCorners:(UIRectCornerTopLeft | UIRectCornerTopRight | UIRectCornerBottomLeft | UIRectCornerBottomRight) cornerRadii:CGSizeMake(cornerSize, cornerSize)];
CAShapeLayer *mlayer = [[CAShapeLayer alloc] init];
mlayer.frame = cell.bounds;
mlayer.path = maskPath.CGPath;
cell.layer.mask = mlayer;
}
// round only top cell and only top-left and top-right corners
else if (indexPath.row == 0) {
UIBezierPath *maskPath;
maskPath = [UIBezierPath bezierPathWithRoundedRect:cell.bounds byRoundingCorners:(UIRectCornerTopLeft | UIRectCornerTopRight) cornerRadii:CGSizeMake(cornerSize, cornerSize)];
CAShapeLayer *mlayer = [[CAShapeLayer alloc] init];
mlayer.frame = cell.bounds;
mlayer.path = maskPath.CGPath;
cell.layer.mask = mlayer;
}
// round bottom-most cell of group and only bottom-left and bottom-right corners
else if (indexPath.row == [rowsArray count] - 1) {
UIBezierPath *maskPath;
maskPath = [UIBezierPath bezierPathWithRoundedRect:cell.bounds byRoundingCorners:(UIRectCornerBottomLeft | UIRectCornerBottomRight) cornerRadii:CGSizeMake(cornerSize, cornerSize)];
CAShapeLayer *mlayer = [[CAShapeLayer alloc] init];
mlayer.frame = cell.bounds;
mlayer.path = maskPath.CGPath;
cell.layer.mask = mlayer;
}
}Depois de tentar algumas das respostas aqui, decidi ir fundo e implementar uma subclasse inteira em cima UITableViewe UITableViewCellreplicar o estilo de visualização de tabela agrupada arredondada no iOS 7.
https://github.com/TimOliver/TORoundedTableView
Acabou sendo um processo muito complicado:
layoutSubviewsem UITableViewque novo layout de cada célula e vista acessório para que eles não eram mais de borda a borda.UITableViewCellpara remover as visualizações de contorno superior e inferior dos separadores (mas deixando as que estão dentro da seção intocadas).UITableViewCellvisualização de plano de fundo personalizada que poderia opcionalmente ter cantos arredondados na parte superior e inferior para ser usada na primeira e na última célula de cada seção. Esses elementos tinham que CALayerevitar UITableViewo comportamento implícito de alterar a cor das visualizações do plano de fundo quando um usuário toca na célula.CALayerinstâncias que não respondem layoutSubviews, tive que fazer alguns ajustes no Core Animation para garantir que as células superior e inferior fossem redimensionadas na mesma velocidade que as outras células quando o usuário girava o dispositivo.Em suma, é possível fazer, mas como requer um pouco de esforço e custa uma pequena quantidade de desempenho (já que está constantemente lutando contra o código da Apple tentando consertar tudo), é melhor registrar um radar com a Apple solicitando expor oficialmente esse estilo. Até então, fique à vontade para usar minha biblioteca. :)
Eu criei um método chamado addRoundedCornersWithRadius:(CGFloat)radius ForCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPathque criará cantos arredondados na parte superior e inferior de cada seção.
A vantagem de usar a maskViewpropriedade de UITableViewCellé que, quando você seleciona a célula, os cantos arredondados ainda ficam visíveis.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"CellIdentifier"];
[cell.textLabel setText:[NSString stringWithFormat:@"Row %d in Section %d", indexPath.row, indexPath.section]];
[tableView addRoundedCornersWithRadius:12.0f ForCell:cell atIndexPath:indexPath];
return cell;
}
- (void)addRoundedCornersWithRadius:(CGFloat)radius ForCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath {
NSInteger MBRows = [self numberOfRowsInSection:indexPath.section] - 1;
CAShapeLayer *MBLayer = [[CAShapeLayer alloc] init];
CGRect cellBounds = CGRectMake(0, 0, self.bounds.size.width, cell.bounds.size.height);
BOOL shouldAddSeperator = NO;
if (indexPath.row == 0 && indexPath.row == MBRows) {
[MBLayer setPath:[UIBezierPath bezierPathWithRoundedRect:cellBounds cornerRadius:radius].CGPath];
} else if (indexPath.row == 0) {
[MBLayer setPath:[UIBezierPath bezierPathWithRoundedRect:cellBounds
byRoundingCorners:(UIRectCornerTopLeft|UIRectCornerTopRight)
cornerRadii:CGSizeMake(radius, radius)].CGPath];
shouldAddSeperator = YES;
} else if (indexPath.row == MBRows) {
[MBLayer setPath:[UIBezierPath bezierPathWithRoundedRect:cellBounds
byRoundingCorners:(UIRectCornerBottomLeft|UIRectCornerBottomRight)
cornerRadii:CGSizeMake(radius, radius)].CGPath];
} else {
[MBLayer setPath:[UIBezierPath bezierPathWithRect:cell.bounds].CGPath];
shouldAddSeperator = YES;
}
[cell setMaskView:[[UIView alloc] initWithFrame:cell.bounds]];
[cell.maskView.layer insertSublayer:MBLayer atIndex:0];
if (shouldAddSeperator == YES) {
CGFloat seperator = (1.0f / [UIScreen mainScreen].scale);
CALayer *cellSeperator = [[CALayer alloc] init];
[cellSeperator setFrame:CGRectMake(15.0f, cell.bounds.size.height - seperator, cell.bounds.size.width - 15.0f, seperator)];
[cellSeperator setBackgroundColor:self.separatorColor.CGColor];
[cell.layer addSublayer:cellSeperator];
}
[cell.maskView.layer setMasksToBounds:YES];
[cell setClipsToBounds:YES];
}
Minha resposta pode ser tarde demais, mas para a versão Swift (qualquer), certamente será útil e muito fácil de usar.
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
if (tableView == self.tableViewMovies) {
//Top Left Right Corners
let maskPathTop = UIBezierPath(roundedRect: cell.bounds, byRoundingCorners: [.topLeft, .topRight], cornerRadii: CGSize(width: 5.0, height: 5.0))
let shapeLayerTop = CAShapeLayer()
shapeLayerTop.frame = cell.bounds
shapeLayerTop.path = maskPathTop.cgPath
//Bottom Left Right Corners
let maskPathBottom = UIBezierPath(roundedRect: cell.bounds, byRoundingCorners: [.bottomLeft, .bottomRight], cornerRadii: CGSize(width: 5.0, height: 5.0))
let shapeLayerBottom = CAShapeLayer()
shapeLayerBottom.frame = cell.bounds
shapeLayerBottom.path = maskPathBottom.cgPath
if (indexPath as NSIndexPath).section == 0 {
if indexPath.row == 0 {
cell.layer.mask = shapeLayerTop
}else if indexPath.row == 2 {
cell.layer.mask = shapeLayerBottom
}
}else if (indexPath as NSIndexPath).section == 1 {
if indexPath.row == 0 {
cell.layer.mask = shapeLayerTop
}else {
cell.layer.mask = shapeLayerBottom
}
}else if (indexPath as NSIndexPath).section == 2 {
if indexPath.row == 0 {
cell.layer.mask = shapeLayerTop
}else if indexPath.row == 2 {
cell.layer.mask = shapeLayerBottom
}
}
}
}PS: Usei o seguinte código para Swift 3.0.
func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath)
{
if (tableView == self.orderDetailsTableView)
{
//Top Left Right Corners
let maskPathTop = UIBezierPath(roundedRect: cell.bounds, byRoundingCorners: [.TopLeft, .TopRight], cornerRadii: CGSize(width: 5.0, height: 5.0))
let shapeLayerTop = CAShapeLayer()
shapeLayerTop.frame = cell.bounds
shapeLayerTop.path = maskPathTop.CGPath
//Bottom Left Right Corners
let maskPathBottom = UIBezierPath(roundedRect: cell.bounds, byRoundingCorners: [.BottomLeft, .BottomRight], cornerRadii: CGSize(width: 5.0, height: 5.0))
let shapeLayerBottom = CAShapeLayer()
shapeLayerBottom.frame = cell.bounds
shapeLayerBottom.path = maskPathBottom.CGPath
//All Corners
let maskPathAll = UIBezierPath(roundedRect: cell.bounds, byRoundingCorners: [.TopLeft, .TopRight, .BottomRight, .BottomLeft], cornerRadii: CGSize(width: 5.0, height: 5.0))
let shapeLayerAll = CAShapeLayer()
shapeLayerAll.frame = cell.bounds
shapeLayerAll.path = maskPathAll.CGPath
if (indexPath.row == 0 && indexPath.row == tableView.numberOfRowsInSection(indexPath.section)-1)
{
cell.layer.mask = shapeLayerAll
}
else if (indexPath.row == 0)
{
cell.layer.mask = shapeLayerTop
}
else if (indexPath.row == tableView.numberOfRowsInSection(indexPath.section)-1)
{
cell.layer.mask = shapeLayerBottom
}
}
}código de trabalho para swift ... o que realmente estamos fazendo é se a seção tem apenas uma linha, então fazemos em todos os lados, se a seção tem várias linhas, então fazemos no topo na primeira linha e na parte inferior na última linha ... as propriedades BottomLeft, BottomRight, topLeft, TopRight devem ser do tipo canto reto (sugestões do xcode quando você está digitando ... há outro canto de conteúdo de propriedade com o mesmo nome .. então verifique isso)
Infelizmente, não parece ser uma maneira fácil de fazer isso. Você terá que personalizar seu UITableViewCell's, algo assim funciona:
Defina o estilo de sua tableView como agrupado.
Defina a cor de fundo da TableView para uma cor clara.
No seu - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)torne o plano de fundo da célula claro e crie um UIView com os cantos arredondados desejados como plano de fundo. Algo assim:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"];
if(cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"Cell"];
}
[cell setBackgroundColor:[UIColor clearColor]];
UIView *roundedView = [[UIView alloc] initWithFrame:cell.frame];
[roundedView setBackgroundColor:[UIColor whiteColor]];
roundedView.layer.cornerRadius = 10.0;
[[cell contentView] addSubview:roundedView];
return cell;
}Você pode precisar fazer mais algum polimento, mas esta é a ideia principal.
Eu queria conseguir o mesmo, mas com borda ao redor de cada seção (linha no iOS6). Como não encontrei uma modificação fácil das soluções sugeridas, criei as minhas próprias. É uma modificação da resposta que @Roberto Ferraz deu neste tópico. Eu criei uma classe personalizada que herda de UITableViewCell. Nele adicionei uma visualização de container com o tamanho apropriado (no meu caso encolhi em ambos os lados com 15px). Do que na aula eu fiz isso:
- (void)layoutSubviews
{
[super layoutSubviews];
CGFloat cornerRadius = 10.0f;
self.vContainerView.layer.cornerRadius = cornerRadius;
self.vContainerView.layer.masksToBounds = YES;
self.vContainerView.layer.borderWidth = 1.0f;
if (self.top && self.bottom)
{
// nothing to do - cell is initialized in prepareForReuse
}
else if (self.top)
{
// cell is on top - extend height to hide bottom line and corners
CGRect frame = self.vContainerView.frame;
frame.size.height += cornerRadius;
self.vContainerView.frame = frame;
self.vSeparatorLine.hidden = NO;
}
else if (self.bottom)
{
// cell is on bottom - extend height and shift container view up to hide top line and corners
CGRect frame = self.vContainerView.frame;
frame.size.height += cornerRadius;
frame.origin.y -= cornerRadius;
self.vContainerView.frame = frame;
self.vSeparatorLine.hidden = YES;
}
else
{
// cell is in the middle - extend height twice the height of corners and shift container view by the height of corners - therefore hide top and bottom lines and corners.
CGRect frame = self.vContainerView.frame;
frame.size.height += (2 * cornerRadius);
frame.origin.y -= cornerRadius;
self.vContainerView.frame = frame;
self.vSeparatorLine.hidden = NO;
}
}
- (void)prepareForReuse
{
// establish original values when cell is reused
CGRect frame = self.vBorderView.frame;
frame.size.height = BORDER_VIEW_HEIGHT;
frame.origin.y = 0;
self.vBorderView.frame = frame;
self.vSeparatorLine.hidden = YES;
}Então, em sua fonte de dados, você faz o seguinte:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
...
// only one cell in section - must be rounded on top & bottom
if (indexPath.row == 0 && indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1)
{
cell.top = YES;
cell.bottom = YES;
}
// first cell - must be rounded on top
else if (indexPath.row == 0)
{
cell.top = YES;
cell.bottom = NO;
}
// last cell - must be rounded on bottom
else if (indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1)
{
cell.top = NO;
cell.bottom = YES;
}
else
{
cell.top = NO;
cell.top = NO;
}
return cell;
}E voila - você tem cantos arredondados E bordas em suas seções.
Espero que isto ajude!
PS Fiz algumas edições, pois encontrei alguns bugs no código original - principalmente não defini todos os valores em todos os casos, o que causa alguns efeitos impressionantes quando as células são reutilizadas :)
swift 4 No caso de você querer incluir o cabeçalho da seção, tente abaixo de um
declare cornerLayerWidth como variável global
var cornerLayerWidth: CGFloat = 0,0
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
let cornerRadius: CGFloat = 10
cell.backgroundColor = .clear
let layer = CAShapeLayer()
let pathRef = CGMutablePath()
let bounds = cell.bounds.insetBy(dx: 0, dy: 0)
cornerLayerWidth = bounds.width
var addLine = false
if indexPath.row == 0 && indexPath.row == tableView.numberOfRows(inSection: indexPath.section) - 1 {
pathRef.__addRoundedRect(transform: nil, rect: bounds, cornerWidth: cornerRadius, cornerHeight: cornerRadius)
}
else if indexPath.row == 0 {
}
else if indexPath.row == tableView.numberOfRows(inSection: indexPath.section) - 1 {
pathRef.move(to: .init(x: bounds.minX, y: bounds.minY))
pathRef.addArc(tangent1End: .init(x: bounds.minX, y: bounds.maxY), tangent2End: .init(x: bounds.midX, y: bounds.maxY), radius: cornerRadius)
pathRef.addArc(tangent1End: .init(x: bounds.maxX, y: bounds.maxY), tangent2End: .init(x: bounds.maxX, y: bounds.midY), radius: cornerRadius)
pathRef.addLine(to: .init(x: bounds.maxX, y: bounds.minY))
} else {
pathRef.addRect(bounds)
addLine = true
}
layer.path = pathRef
layer.fillColor = UIColor(white: 1, alpha: 1).cgColor
if (addLine == true) {
let lineLayer = CALayer()
let lineHeight = 1.0 / UIScreen.main.scale
lineLayer.frame = CGRect(x: bounds.minX, y: bounds.size.height - lineHeight, width: bounds.size.width , height: lineHeight)
lineLayer.backgroundColor = tableView.separatorColor?.cgColor
layer.addSublayer(lineLayer)
}
let testView = UIView(frame: bounds)
testView.layer.insertSublayer(layer, at: 0)
testView.backgroundColor = .clear
cell.backgroundView = testView
}e
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let cell = tableView.dequeueReusableCell(withIdentifier: "eMPOIListHeaderViewCell") as! eMPOIListHeaderViewCell
let cornerRadius: CGFloat = 10
let layer = CAShapeLayer()
let pathRef = CGMutablePath()
let bounds = CGRect(x: 0, y: 0, width: cornerLayerWidth, height: 50)//cell.bounds.insetBy(dx: 0, dy: 0)
pathRef.__addRoundedRect(transform: nil, rect: bounds, cornerWidth: cornerRadius, cornerHeight: cornerRadius)
pathRef.move(to: .init(x: bounds.minX, y: bounds.maxY))
pathRef.addArc(tangent1End: .init(x: bounds.minX, y: bounds.minY), tangent2End: .init(x: bounds.midX, y: bounds.minY), radius: cornerRadius)
pathRef.addArc(tangent1End: .init(x: bounds.maxX, y: bounds.minY), tangent2End: .init(x: bounds.maxX, y: bounds.midY), radius: cornerRadius)
pathRef.addLine(to: .init(x: bounds.maxX, y: bounds.maxY))
layer.path = pathRef
layer.fillColor = UIColor(white: 1, alpha: 1).cgColor
let lineLayer = CALayer()
let lineHeight = 1.0 / UIScreen.main.scale
lineLayer.frame = CGRect(x: bounds.minX, y: bounds.size.height - lineHeight, width: bounds.size.width , height: lineHeight)
lineLayer.backgroundColor = tableView.separatorColor?.cgColor
layer.addSublayer(lineLayer)
let testView = UIView(frame: bounds)
testView.layer.insertSublayer(layer, at: 0)
testView.backgroundColor = .clear
cell.backgroundView = testView
return cell
}Em Swift 4.2:
class MyCell: UITableViewCell {
var top = false
var bottom = false
override func layoutSubviews() {
super.layoutSubviews()
if top && bottom {
layer.cornerRadius = 10
layer.masksToBounds = true
return
}
let shape = CAShapeLayer()
let rect = CGRect(x: 0, y: 0, width: bounds.width, height: bounds.size.height)
let corners: UIRectCorner = self.top ? [.topLeft, .topRight] : [.bottomRight, .bottomLeft]
shape.path = UIBezierPath(roundedRect: rect, byRoundingCorners: corners, cornerRadii: CGSize(width: 10, height: 10)).cgPath
layer.mask = shape
layer.masksToBounds = true
}
}Usar:
Se a célula for a primeira de um grupo, defina top = True, se for a última célula bottom = true, se a célula for a única no grupo defina ambos como true.
Se você quiser mais ou menos arredondado, basta trocar os rádios de 10 para outro valor.
Este código definirá cantos arredondados para visualização de tabela inteira em vez de célula única.
UIView *roundedView = [[UIView alloc] initWithFrame:CGRectInset(table.frame, 5, 0)];
roundedView.backgroundColor = [UIColor colorWithWhite:1.f alpha:0.8f];
roundedView.layer.cornerRadius = 5.f;
[self.view addSubview:roundedView];
[roundedView release];
[self.view addSubview:table];E limpe a cor de fundo de cada célula em cellForRow
cell.backgroundColor=[UIColor clearColor];Adicione isso para remover a linha superior no tableview self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;