摘要：
UIView *whiteView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];[whiteView setBackgroundColor:[UIColor whiteColor]];[whiteView setUserInteractionEnabled:NO];[self.view addSubview:whiteView];CALayer *maskLayer = [CALayer layer];// Mask imag 阅读全文