- #define SCREEN_WIDTH [[UIScreen mainScreen] bounds].size.width
- #define SCREEN_HEIGHT [[UIScreen mainScreen] bounds].size.height
- - (void)addMask{
- UIButton * _maskButton = [[UIButton alloc] init];
- [_maskButton setFrame:CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT)];
- [_maskButton setBackgroundColor:[UIColor colorWithWhite:0 alpha:0.7]];
- [self.view addSubview:_maskButton];
- //把下面代码加入到view的-drawRect'中便可以实现
- //create path
- UIBezierPath *path = [UIBezierPath bezierPathWithRect:CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT)];
- // MARK: circlePath
- [path appendPath:[UIBezierPath bezierPathWithArcCenter:CGPointMake(SCREEN_WIDTH / 2, 200) radius:100 startAngle:0 endAngle:2*M_PI clockwise:NO]];
- // MARK: roundRectanglePath
- [path appendPath:[[UIBezierPath bezierPathWithRoundedRect:CGRectMake(20, 400, SCREEN_WIDTH - 200, 100) cornerRadius:15] bezierPathByReversingPath]];
- CAShapeLayer *shapeLayer = [CAShapeLayer layer];
- shapeLayer.path = path.CGPath;
- [_maskButton.layer setMask:shapeLayer];
- }