FXBlurView用法

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。

 - (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(, , , )];
     aview.tintColor = [UIColor whiteColor];  //前景颜色
     aview.blurRadius = 20.0;                 //模糊半径
     aview.dynamic = YES;                     //动态改变模糊效果
     [self.view addSubview:aview];

     FXBlurView * bview = [[FXBlurView alloc] initWithFrame:CGRectMake(, , , )];
     bview.tintColor = [UIColor whiteColor];  //前景颜色
     bview.blurEnabled = YES;                //是否允许模糊，默认YES
     bview.blurRadius = 10.0;               //模糊半径
     bview.dynamic = YES;                   //动态改变模糊效果
     bview.iterations = ;                  //迭代次数：
     bview.updateInterval = 2.0;            //更新时间（不确定具体功能）

     /*
      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(, , , )];
     cview.blurRadius = 20.0;
     cview.tintColor = [UIColor whiteColor];
     [self.view addSubview:cview];
 }

demo下载：https://github.com/nicklockwood/FXBlurView