更改方向更改背景失败

tika 发表于 Dev

曾是

我有两个图像，bg-land并且bg-port方向不同。我想更改图像的方向。但是，图像不会改变。当我在LandScape中加载模拟器时，bg-land可以完美运行，但不能与“旋转”一起使用。代码：

   override func viewDidLoad() {
        super.viewDidLoad()
        loadBackground()  
    }

    func loadBackground(){

        if(UIApplication.sharedApplication().statusBarOrientation.isPortrait){
            var bgImage      = UIImage(named: "bg-port")
            var background   = UIImageView(frame: self.view.bounds);
            background.image = bgImage
            self.view.addSubview(background)
            self.view.sendSubviewToBack(background)
            println(bgImage)
        } else {
            var bgImage      = UIImage(named: "bg-land")
            var background   = UIImageView(frame: self.view.bounds);
            background.image = bgImage
            self.view.addSubview(background)
            self.view.sendSubviewToBack(background)
            println(bgImage)
        }


    }

    override func didRotateFromInterfaceOrientation(fromInterfaceOrientation: UIInterfaceOrientation) {
        loadBackground()
    }

Midhun MP

它没有更改，因为您UIImageView要将新添加的添加到先前创建的的后面UIImageView。不必这样做，而是在的类中创建一个成员变量UIImageView。（将其命名为background）

func loadBackground()
{
   if self.background == nil
   {
      self.background = UIImageView()
      self.view.addSubview(self.background)
      self.view.sendSubviewToBack(self.background)
   }

   if(UIApplication.sharedApplication().statusBarOrientation.isPortrait)
   {
        var bgImage           = UIImage(named: "bg-port")
        self.background.frame = self.view.bounds;
        self.background.image = bgImage
   }
   else
   {
        var bgImage           = UIImage(named: "bg-land")
        self.background.frame = self.view.bounds;
        background.image      = bgImage
   }
}