objective-c - hidesBackButton 不起作用

Question

[BGFacebookDelegateSingleton.singleton logoutFacebook];
BGLogin * login = [[BGLogin alloc]init];
UINavigationController * nav= self.navigationController;
[nav pushViewController:login animated:YES];
login.navigationItem.hidesBackButton=YES;//Button doesn't go out
PO(@(login.navigationItem.hidesBackButton)); //Confirm it's YES
while (false);

我想知道这可能有什么问题。它适用于其他地方但不适用于之后

[BGFacebookDelegateSingleton.singleton logoutFacebook];

[BGFacebookDelegateSingleton.singleton logoutFacebook]的内容；

只是：[FBSession.activeSession closeAndClearTokenInformation]；

Answer 1

尝试[self.navigationItem setHidesBackButton:YES];在登录名中写入viewDidLoad()

希望这可以帮助。