Swift - 设置tableView每个分区cell圆角
1.// 重新绘制cell边框
func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
let cornerRadius: CGFloat = 10
cell.backgroundColor = UIColor.clearColor()
let layer = CAShapeLayer()
let pathRef = CGPathCreateMutable()
let bounds = CGRectInset(cell.bounds, 10, 0)
var addLine = 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
//颜色修改
layer.fillColor = UIColor.init(white: 1, alpha: 0.5).CGColor
layer.strokeColor = UIColor.lightGrayColor().CGColor
if addLine == true {
let lineLayer = CALayer()
let lineHeight = (1 / 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)
}
let testView = UIView(frame: bounds)
testView.layer.insertSublayer(layer, atIndex: 0)
testView.backgroundColor = UIColor.clearColor()
cell.backgroundView = testView
}
2.// 设置tableView每个分区cell圆角
func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
// 圆角弧度半径
let cornerRadius: CGFloat = 6
// 设置cell的背景色为透明,如果不设置这个的话,则原来的背景色不会被覆盖
cell.backgroundColor = UIColor.clearColor()
// 创建一个shapeLayer
let layer = CAShapeLayer()
let backgroundLayer = CAShapeLayer() //显示选中
// 创建一个可变的图像Path句柄,该路径用于保存绘图信息
let pathRef = CGPathCreateMutable()
// 获取cell的size
// 第一个参数,是整个 cell 的 bounds, 第二个参数是距左右两端的距离,第三个参数是距上下两端的距离
let bounds = CGRectInset(cell.bounds, 10, 0)
// CGRectGetMinY:返回对象顶点坐标
// CGRectGetMaxY:返回对象底点坐标
// CGRectGetMinX:返回对象左边缘坐标
// CGRectGetMaxX:返回对象右边缘坐标
// CGRectGetMidX: 返回对象中心点的X坐标
// CGRectGetMidY: 返回对象中心点的Y坐标
// 这里要判断分组列表中的第一行,每组section的第一行,每组section的中间行
// CGPathAddRoundedRect(pathRef, nil, bounds, cornerRadius, cornerRadius)
if indexPath.row == 0 {
// 初始起点为cell的左下角坐标
CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds))
// 起始坐标为左下角,设为p,(CGRectGetMinX(bounds), CGRectGetMinY(bounds))为左上角的点,设为p1(x1,y1),(CGRectGetMidX(bounds), CGRectGetMinY(bounds))为顶部中点的点,设为p2(x2,y2)。然后连接p1和p2为一条直线l1,连接初始点p到p1成一条直线l,则在两条直线相交处绘制弧度为r的圆角。
CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds), CGRectGetMidX(bounds), CGRectGetMinY(bounds), cornerRadius)
CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius)
// 终点坐标为右下角坐标点,把绘图信息都放到路径中去,根据这些路径就构成了一块区域了
CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds))
} else if indexPath.row == tableView.numberOfRowsInSection(indexPath.section)-1 {
// 初始起点为cell的左上角坐标
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)
// 添加一条直线,终点坐标为右下角坐标点并放到路径中去
CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds))
} else {
// 添加cell的rectangle信息到path中(不包括圆角)
//假如用填充色,用这个
// CGPathAddRect(pathRef, nil, bounds)
//假如只要边框
CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds))
CGPathAddLineToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds))
CGPathMoveToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds))
CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds))
}
// 把已经绘制好的可变图像路径赋值给图层,然后图层根据这图像path进行图像渲染render
layer.path = pathRef
backgroundLayer.path = pathRef
// 按照shape layer的path填充颜色,类似于渲染render
// layer.fillColor = [UIColor colorWithWhite:1.f alpha:0.8f].CGColor
layer.strokeColor = UIColor.blackColor().CGColor
layer.fillColor = UIColor.clearColor().CGColor
// view大小与cell一致
let roundView = UIView(frame: self.view.bounds)
// 添加自定义圆角后的图层到roundView中
roundView.layer.insertSublayer(layer, atIndex: 0)
roundView.backgroundColor = UIColor.clearColor()
// cell的背景view
cell.backgroundView = roundView
// 以上方法存在缺陷当点击cell时还是出现cell方形效果,因此还需要添加以下方法
// 如果你 cell 已经取消选中状态的话,那以下方法是不需要的.
let selectedBackgroundView = UIView(frame: self.view.bounds)
backgroundLayer.fillColor = UIColor.cyanColor().CGColor
selectedBackgroundView.layer.insertSublayer(backgroundLayer, atIndex: 0)
selectedBackgroundView.backgroundColor = UIColor.clearColor()
cell.selectedBackgroundView = selectedBackgroundView
// 在使用上面代码前需要把tableView默认的分割线设置为None
}