释放双眼,带上耳机,听听看~!
错误原因:
在于AppDelegate中didFinishLaunchingWithOptions未定义rootViewController,Xcode规定必须要有rootViewController。
解决办法:
UIViewController*emptyView=[[UIViewControlleralloc]initNibName:nilbundle:nil];self.window.rootViewController=emptyView;