iOS Navigationcontroller code creation

1. New class file Firstviewcontroller,subclass Of:uiviewcontroller

2. New class file Mynavigationcontroller,subclass Of:uinavigationcontroller

3.APPDELEGATE.M contains the above two header files and then writes in Didfinishlaunchingwithoptions

Firstviewcontroller *viewcontroller = [[Firstviewcontroller alloc]initwithnibname:nil Bundle:nil];

Mynavigationcontroller *navigationcontroller = [[Mynavigationcontroller alloc]initwithrootviewcontroller: Viewcontroller];

Self.window = [[UIWindow alloc]initwithframe:[[uiscreen Mainscreen] bounds]];

Self.window.rootViewController = Navigationcontroller;

Self.window.backgroundColor = [Uicolor Whitecolor];

[Self.window Makekeywindow];

return YES;

4. Return button settings

Back button

Uibarbuttonitem *return = [[Uibarbuttonitem alloc] initwithbarbuttonsystemitem:uibarbuttonsystemitemreply target: Self action: @selector (pop)];

Self.navigationItem.leftBarButtonItems = @[return];

iOS Navigationcontroller code creation