ios - 如何使 iOS 应用程序窗口的背景图像居中

Question

我一直在研究如何将应用程序的背景图像居中。这主要是为了允许我使用方形图像来减少要存储的资源量（并在进行更改时更新）。

Answer 1

这是我用来实现结果的代码

//  Create the window covering the bounds of the entire screen
self.window = [ [ [ UIWindow alloc ] initWithFrame:[ [ UIScreen mainScreen ] bounds ] ] autorelease ];

//  Set the background for the game.  This will show on the flip transition.
UIImageView  *bg = [ [ UIImageView alloc ] initWithImage: [ UIImage imageNamed: @"Background.png" ] ];
bg.frame = self.window.bounds;
bg.contentMode = UIViewContentModeCenter;

[ self.window addSubview: bg ];
[ self.window sendSubviewToBack: bg ];
[ bg release ];