SwiftOC 为View或ImageView设置聊天消息的小三角

概述Swift代码 override func viewDidLoad() { super.viewDidLoad() //UIImageView let showView = UIImageView(frame: CGRectMake(100, 100, 100, 100)) showView.image = UIImage(named: "Snip20160422 Swift代码

overrIDe func vIEwDIDLoad() {    super.vIEwDIDLoad()    //UIImageVIEw    let showVIEw = UIImageVIEw(frame: CGRectMake(100,100,100))    showVIEw.image = UIImage(named: "Snip20160422_3")    showVIEw.layer.mask = test(showVIEw)    self.vIEw.addSubvIEw(showVIEw)    //UIVIEw    let blankVIEw = UIVIEw(frame: CGRectMake(250,100))    blankVIEw.backgroundcolor = UIcolor.greencolor()    blankVIEw.layer.mask = test(blankVIEw)    self.vIEw.addSubvIEw(blankVIEw)}///把设置小三角func test(showVIEw: UIVIEw) -> CAShapeLayer {    let vIEwWIDth = CGfloat(CGRectGetWIDth(showVIEw.frame))    let vIEwHeight = CGfloat(CGRectGetHeight(showVIEw.frame))    //所占的宽度,整个vIEw所占的宽度不会变,已经被制定,所以这个宽度会占用整个vIEw的宽度,    let rightSpace: CGfloat = 10    //距离顶部的距离    let topSpace: CGfloat = 30    let point1 = CGPointMake(0,0)    let point2 = CGPointMake(vIEwWIDth - rightSpace,0)    let point3 = CGPointMake(vIEwWIDth - rightSpace,topSpace)    let point4 = CGPointMake(vIEwWIDth,topSpace)    let point5 = CGPointMake(vIEwWIDth - rightSpace,topSpace + 10)    let point6 = CGPointMake(vIEwWIDth - rightSpace,vIEwHeight)    let point7 = CGPointMake(0,vIEwHeight)    let path = UIBezIErPath()    path.movetoPoint(point1)    path.addlinetoPoint(point2)    path.addlinetoPoint(point3)    path.addlinetoPoint(point4)    path.addlinetoPoint(point5)    path.addlinetoPoint(point6)    path.addlinetoPoint(point7)    let layer = CAShapeLayer()    layer.path = path.CGPath    return layer    }}

OC代码

- (voID)vIEwDIDLoad {    [super vIEwDIDLoad];    UIVIEw *blankVIEw = [[UIVIEw alloc] initWithFrame:CGRectMake(100,100)];    blankVIEw.backgroundcolor = [UIcolor redcolor];    blankVIEw.layer.mask = [self testWithVIEw:blankVIEw];    [self.vIEw addSubvIEw:blankVIEw];    UIImageVIEw *imageVIEw = [[UIImageVIEw alloc] initWithFrame:CGRectMake(250,100)];    imageVIEw.image = [UIImage imagenamed:@"Snip20160422_3"];    imageVIEw.layer.mask = [self testWithVIEw:blankVIEw];    [self.vIEw addSubvIEw:imageVIEw];}- (CAShapeLayer *)testWithVIEw:(UIVIEw *)vIEw{    CGfloat vIEwWIDth = CGRectGetWIDth(vIEw.frame);    CGfloat vIEwHeight = CGRectGetHeight(vIEw.frame);    CGfloat rightSpace = 10;    CGfloat topSpace = 15;    CGPoint point1 = CGPointMake(0,0);    CGPoint point2 = CGPointMake(vIEwWIDth-rightSpace,0);    CGPoint point3 = CGPointMake(vIEwWIDth-rightSpace,topSpace);    CGPoint point4 = CGPointMake(vIEwWIDth,topSpace);    CGPoint point5 = CGPointMake(vIEwWIDth-rightSpace,topSpace+10.);    CGPoint point6 = CGPointMake(vIEwWIDth-rightSpace,vIEwHeight);    CGPoint point7 = CGPointMake(0,vIEwHeight);    UIBezIErPath *path = [UIBezIErPath bezIErPath];    [path movetoPoint:point1];    [path addlinetoPoint:point2];    [path addlinetoPoint:point3];    [path addlinetoPoint:point4];    [path addlinetoPoint:point5];    [path addlinetoPoint:point6];    [path addlinetoPoint:point7];    [path closePath];    CAShapeLayer *layer = [CAShapeLayer layer];    layer.path = path.CGPath;    return layer;}

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