如何添加UIActivityIndi​​catorView背後黑色背景

Question

你好，我想表明我的UIViewController一個UIActivityIndicatorView正是這樣

我怎樣繪製UIViewIndicator這樣上圖中

我曾嘗試這

func showIndicatorView(){ 

     let loadingIndicator = UIActivityIndicatorView(frame: CGRectMake(0, 0, 50, 50)) 
     loadingIndicator.layer.cornerRadius = 05 

     loadingIndicator.opaque = false 
     loadingIndicator.backgroundColor = UIColor(white: 0.0, alpha: 0.6) 
     loadingIndicator.center = self.view.center; 
     loadingIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray 
     loadingIndicator.color = UIColor.whiteColor() 
     loadingIndicator.startAnimating() 
     self.view.addSubview(loadingIndicator) 


    } 

Answer 1

你可以把它放在另一個有黑色背景的視圖。像這樣的東西。如果您需要，也可以在該視圖中添加「加載...」標籤。

func showIndicatorView(){ 

    let loadingIndicator = UIActivityIndicatorView(frame: CGRectMake(0, 0, 50, 50)) 
    let backgroundView = UIView() 

    backgroundView.layer.cornerRadius = 05 
    backgroundView.clipsToBounds = true 
    backgroundView.opaque = false 
    backgroundView.backgroundColor = UIColor(white: 0.0, alpha: 0.6) 

    loadingIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray 
    loadingIndicator.color = UIColor.whiteColor() 
    loadingIndicator.startAnimating() 

    let loadingLabel = UILabel() 
    loadingLabel.text = "Loading..." 
    let textSize: CGSize = loadingLabel.text!.sizeWithAttributes([NSFontAttributeName: loadingLabel.font ]) 

    loadingLabel.frame = CGRectMake(50, 0, textSize.width, textSize.height) 
    loadingLabel.center.y = loadingIndicator.center.y 

    backgroundView.frame = CGRectMake(0, 0, textSize.width + 70, 50) 
    backgroundView.center = self.view.center; 

    self.view.addSubview(backgroundView) 
    backgroundView.addSubview(loadingIndicator) 
    backgroundView.addSubview(loadingLabel) 
} 

Answer 2

使用MBProgressHud庫。

這是你所需要的： -

https://github.com/jdg/MBProgressHUD