UIVisualEffects，UIWebView透明背景

Question

我正在使用Cordova构建iOS应用程序。 我想我的webview是透明的，背后是用户壁纸的模糊背景。就像ios提醒应用程序一样。

我知道这是一个常见的问题，但我没有找到指定的回复

这可能吗？

在我viewDidLoad方法中，我添加这些行：提前

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    self.view.backgroundColor = [UIColor clearColor]; 

    UIBlurEffect *blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleDark]; 
    UIVisualEffectView *blurEffectView = [[UIVisualEffectView alloc] initWithEffect:blurEffect]; 
    blurEffectView.frame = self.view.bounds; 
    blurEffectView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight; 

    //This line places a dark black background with my app being blurred behind it 
    [self.view addSubview:blurEffectView]; 

    //This line instead just makes background of app plain black (the body of html app is transparent) and not blurred , I guess there is something wrong with view hierarchy maybe? 
    [self.view addSubview:self.webView]; 


    [self.webView setOpaque:NO]; 
    [self.webView setBackgroundColor:[UIColor clearColor]]; 
} 

感谢

Answer 1

设置的WebView背景颜色和不透明的顺序应该是这样的

[self.webView setBackgroundColor:[UIColor clearColor]]; 
[self.webView setOpaque:NO];