摘要：
首先需要一个Nav，在FirstAppAppDelegate.m里添加：-(BOOL)application:(UIApplication*)applicationdidFinishLaunchingWithOptions:(NSDictionary*)launchOptions{//...ImageViewController*imgTab=[[ImageViewControlleralloc]init];UINavigationController*navImg=[[UINavigationControlleralloc]initWithRootViewController:imgTab. 阅读全文