FXBlurView是UIView的子类，它实现毛玻璃效果的原理其实就是覆盖上一层FXBlurView的实例对象。
1 - (void)viewDidLoad { 2 [super viewDidLoad]; 3 4 UIImageView * imageView = [[UIImageView alloc] initWithFrame:self.view.bounds]; 5 imageView.image = [UIImage imageNamed:@"Default-Port-hd47"]; 6 [self.view addSubview:imageView]; 7 8 FXBlurView * aview = [[FXBlurView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)]; 9 aview.tintColor = [UIColor whiteColor]; //前景颜色 10 aview.blurRadius = 20.0; //模糊半径 11 aview.dynamic = YES; //动态改变模糊效果 12 [self.view addSubview:aview]; 13 14 FXBlurView * bview = [[FXBlurView alloc] initWithFrame:CGRectMake(0, 120, 100, 100)]; 15 bview.tintColor = [UIColor whiteColor]; //前景颜色 16 bview.blurEnabled = YES; //是否允许模糊，默认YES 17 bview.blurRadius = 10.0; //模糊半径 18 bview.dynamic = YES; //动态改变模糊效果 19 bview.iterations = 2; //迭代次数： 20 bview.updateInterval = 2.0; //更新时间（不确定具体功能） 21 22 /* 23 blurRadius ＝ 1.0 && dynamic ＝ 100 的效果和 blurRadius ＝ 10.0 && dynamic ＝ 1的效果大致相同 24 */ 25 26 [self.view addSubview:bview]; 27 28 FXBlurView * cview = [[FXBlurView alloc] initWithFrame:CGRectMake(150, 0, 200, 200)]; 29 cview.blurRadius = 20.0; 30 cview.tintColor = [UIColor whiteColor]; 31 [self.view addSubview:cview]; 32 }
demo下载：https://github.com/nicklockwood/FXBlurView