CALayer面具去除？

Question

我知道掩码添加了像

这样的东西

UIImageView *mask = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"mask.png"]];
[mask setFrame:kHexagonMaskRect];
[self setBackgroundColor:kBackgroundColor];
[self layer].mask = [mask layer];
[mask release];

但我如何删除它？将它设置为nil有效，但这是泄漏。

Answer 1

#import <QuartzCore/QuartzCore.h>

添加掩码

UIImageView *maskimageview = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"mask.png"]];
CALayer *mask = [CALayer layer];
mask.contents = (id)[[UIImage imageNamed:@"mask.png"] CGImage];
maskimageview.layer.mask = mask;
maskimageview.layer.masksToBounds = YES;

删除面具

 maskimageview.layer.mask = nil;

希望，这会对你有帮助..