UIBlurEffect系统自带毛玻璃效果

`objc
//需要模糊效果的view
UIImageView*i = [[UIImageViewalloc]initWithFrame:CGRectMake(100,100,100,200)];
[self.viewaddSubview:i];
i.image= [UIImageimageNamed:@”1”];

//创建UIBlurEffect
UIBlurEffect*blurEffect = [UIBlurEffecteffectWithStyle:UIBlurEffectStyleLight];

//UIVisualEffectView
UIVisualEffectView*effectView = [[UIVisualEffectViewalloc]initWithEffect:blurEffect]; //设置模糊效果的frame effectView.frame = i.bounds; //添加到view上 [iaddSubview:effectView]; //设置模糊的程度 effectView.alpha =.5f;
typedefNS_ENUM(NSInteger, UIBlurEffectStyle) { UIBlurEffectStyleExtraLight, UIBlurEffectStyleLight,
UIBlurEffectStyleDark}