我的项目在没有Storyboard的情况下运行，所以我在AppDelegate中加载了我的View:-(BOOL)application:(UIApplication*)applicationdidFinishLaunchingWithOptions:(NSDictionary*)launchOptions{UIWindow*window=[[UIWindowalloc]initWithFrame:[[UIScreenmainScreen]bounds]];self.window=window;self.window.rootViewController=[[SYLoginContro