普通UIwindow初始化方法
self.window = [[uiwindow alloc] initwithframe:[[uiscreen mainscreen]bounds]]antorelease]
UIwindow根据优先级不同有三种:(优先级依次由低到高)
UIwindowleveNormal //普通window
UIWindowlevelstatusBar // 状态级window
UIwindowleveAlert // 警示级window
window上可以加其他视图:
[self.window addSubview:view]
根控制器去执行视图的加载和切换(rootViewcontroller):
slef.window.rootViewcontroller = [[[rootViewcontroller alloc] init]
autorelease]
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