FXBlurView是UIView的子類，它實現(xiàn)毛玻璃效果的原理其實就是覆蓋上一層FXBlurView的實例對象。

- (void)viewDidLoad {

[super viewDidLoad];

UIImageView * imageView = [[UIImageView alloc] initWithFrame:self.view.bounds];

imageView.image = [UIImage imageNamed:@"Default-Port-hd47"];

[self.view addSubview:imageView];

FXBlurView * aview = [[FXBlurView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];

aview.tintColor = [UIColor whiteColor];? //前景顏色

aview.blurRadius = 20.0;???????????????? //模糊半徑

aview.dynamic = YES;???????????????????? //動態(tài)改變模糊效果

[self.view addSubview:aview];

FXBlurView * bview = [[FXBlurView alloc] initWithFrame:CGRectMake(0, 120, 100, 100)];

bview.tintColor = [UIColor whiteColor];? //前景顏色

bview.blurEnabled = YES;??????????????? //是否允許模糊，默認(rèn)YES

bview.blurRadius = 10.0;?????????????? //模糊半徑

bview.dynamic = YES;?????????????????? //動態(tài)改變模糊效果

bview.iterations = 2;????????????????? //迭代次數(shù)：

bview.updateInterval = 2.0;??????????? //更新時間（不確定具體功能）

/*

blurRadius ＝ 1.0 && dynamic ＝ 100 的效果和 blurRadius ＝ 10.0 && dynamic ＝ 1的效果大致相同

*/

[self.view addSubview:bview];

FXBlurView * cview = [[FXBlurView alloc] initWithFrame:CGRectMake(150, 0, 200, 200)];

cview.blurRadius = 20.0;

cview.tintColor = [UIColor whiteColor];

[self.view addSubview:cview];

}