for (int i = 0; i < 5; i ++ ) {
CAShapeLayer *shapeLayer = [CAShapeLayer layer];
CGRect rect = shapeLayer.frame;
rect.origin.y = 50*(i+1);
shapeLayer.frame = rect;
//设置虚线颜色
[shapeLayer setStrokeColor:[UIColor redColor].CGColor];
[shapeLayer setLineJoin:kCALineJoinRound];
//设置虚线的线宽及间距
[shapeLayer setLineDashPattern:[NSArray arrayWithObjects:@5,@2,nil]];
//创建虚线绘制路径
CGMutablePathRef path = CGPathCreateMutable();
//设置虚线绘制路径起点
CGPathMoveToPoint(path, NULL, 0, 0);
//设置虚线绘制路径终点
CGPathAddLineToPoint(path, NULL,self.view.frame.size.width, 0);
//设置虚线绘制路径
[shapeLayer setPath:path];
CGPathRelease(path);
[self.view .layer addSublayer:shapeLayer];
}
