UIView子类中的CAShapeLayer

我想用掩码来创buildUIView的子类。 我尝试过使用drawRect和layoutSubviews但没有成功，在这些尝试视图不出现。

 - (void)layoutSubviews { [super layoutSubviews]; UIBezierPath *path = [UIBezierPath new]; [path moveToPoint:(CGPoint){self.frame.origin.x + 10, self.frame.origin.y}]; [path addLineToPoint:(CGPoint){self.frame.origin.x + self.frame.size.width, self.frame.origin.y}]; [path addLineToPoint:(CGPoint){self.frame.origin.x + self.frame.size.width, self.frame.origin.y + self.frame.size.height}]; [path addLineToPoint:(CGPoint){self.frame.origin.x +10, self.frame.origin.y + self.frame.size.height}]; [path addLineToPoint:(CGPoint){self.frame.origin.x +10, self.frame.origin.y + (self.frame.size.height/2) + 5}]; [path addLineToPoint:(CGPoint){self.frame.origin.x , self.frame.origin.y + (self.frame.size.height/2)}]; [path addLineToPoint:(CGPoint){self.frame.origin.x +10, self.frame.origin.y + (self.frame.size.height/2) - 5}]; [path closePath]; CAShapeLayer *mask = [CAShapeLayer new]; mask.frame = self.bounds; mask.path = path.CGPath; self.layer.mask = mask; } 

我有什么方法覆盖这样做？ 我看到类似问题的答案，但不适合我。

Answer 1

我find了一个解决scheme。 我在我的视野里创造了另一个视angular，并将面具应用于她。

码：

 @interface BubbleView() @property (nonatomic, strong) UIView *maskView; @end @implementation BubbleView -(id) initWithCoder:(NSCoder *)aDecoder { self = [super initWithCoder:aDecoder]; self.maskView = [[UIView alloc] init]; [self addSubview:self.maskView]; self.backgroundColor = [UIColor colorWithWhite:1.0 alpha:0.0]; return self; } - (void)drawRect:(CGRect)rect { self.maskView.frame = self.bounds; self.maskView.backgroundColor = [UIColor whiteColor]; [super drawRect:rect]; } - (void)layoutSubviews { [super layoutSubviews]; UIBezierPath *path = [UIBezierPath new]; [path moveToPoint:(CGPoint){self.maskView.frame.origin.x + 10, self.maskView.frame.origin.y}]; [path addLineToPoint:(CGPoint){self.maskView.frame.origin.x + self.maskView.frame.size.width, self.maskView.frame.origin.y}]; [path addLineToPoint:(CGPoint){self.maskView.frame.origin.x + self.maskView.frame.size.width, self.maskView.frame.origin.y + self.maskView.frame.size.height}]; [path addLineToPoint:(CGPoint){self.maskView.frame.origin.x +10, self.maskView.frame.origin.y + self.maskView.frame.size.height}]; [path addLineToPoint:(CGPoint){self.maskView.frame.origin.x +10, self.maskView.frame.origin.y + (self.maskView.frame.size.height/2) + 5}]; [path addLineToPoint:(CGPoint){self.maskView.frame.origin.x , self.maskView.frame.origin.y + (self.maskView.frame.size.height/2)}]; [path addLineToPoint:(CGPoint){self.maskView.frame.origin.x +10, self.maskView.frame.origin.y + (self.maskView.frame.size.height/2) - 5}]; [path closePath]; CAShapeLayer *mask = [CAShapeLayer new]; mask.frame = self.maskView.bounds; mask.path = path.CGPath; self.maskView.layer.mask = mask; [self layoutIfNeeded]; }