ios - 全屏模糊 View

Question

我想在触摸“显示 View ”按钮时在我的应用中显示模糊背景。我可以制作模糊背景，但它不是全屏。它显示在选项卡栏和导航栏下方。

这是我的登录屏幕，也是我想要的 (SCLAlertView)

但是我们不能向这个库中添加自定义 View 。所以我想制作一个自定义 View 并向该 View 添加一个进度条。

 @property (nonatomic, strong) UIView *ContentView;
 @property (nonatomic, strong) UIImageView *BgView;


_BgView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0,[[UIScreen mainScreen] applicationFrame].size.width,[[UIScreen mainScreen] applicationFrame].size.height)];

[_BgView setBackgroundColor:[UIColor blackColor]];
_BgView.userInteractionEnabled = YES;
_BgView.alpha = 1.0;
_BgView.tag=7001;

_ContentView = [[UIView alloc] init];
_ContentView.tag=7002;

[self.view addSubview:_ContentView];

_ContentView.backgroundColor = [UIColor whiteColor];
_ContentView.layer.cornerRadius = 2.0f;
_ContentView.layer.masksToBounds = YES;
_ContentView.layer.borderWidth = 0.5f;

当我触摸一个按钮时它调用这个方法

-(void)BlurBg{

    float width = self.view.frame.size.width-20;
    float height= 120.0;
    float x     = (self.view.frame.size.width-width)/2;
    float y     = (self.view.frame.size.height-height)/2;

    _ContentView.frame = CGRectMake(x, y, width, height);
    UIButton *OkBtn = [[UIButton alloc] initWithFrame:CGRectMake((_ContentView.frame.size.width-(_IcerikView.frame.size.width/3))/2, ((_ContentView.frame.size.height-20)/3)*2, _ContentView.frame.size.width/3, 40)];
    OkBtn.backgroundColor=[UIColor greenColor];
    [OkBtn setTitle:@"OK" forState:UIControlStateNormal];
    OkBtn.layer.cornerRadius = 1;
    OkBtn.clipsToBounds = YES;
    [OkBtn addTarget:self action:@selector(Sonuc) forControlEvents:UIControlEventTouchUpInside];

    [_ContentView addSubview:OkBtn];

    [self.view addSubview:_BgView];
    [self.view addSubview:_ContentView];
}

-(void) Sonuc{
    [[self.view viewWithTag:7001] removeFromSuperview];
    [[self.view viewWithTag:7002] removeFromSuperview];
}

Answer 1

Apple 为我们提供了一个很好的资源来复制模糊效果。查看UIBlurEffect

typedef enum {
UIBlurEffectStyleExtraLight,
UIBlurEffectStyleLight,
UIBlurEffectStyleDark 
} UIBlurEffectStyle;