通用/中央popViewControllerAnimated方法

Question

我有一个可爱的小问题和场景：

问:我可以让self.navigationController popViewControllerAnimated:True

从一个中心类被控制，例如必须在每个视图中重复。

这就是我到目前为止所看到的视图：

//this is all I want to accomplish and repeat in every view. I want to pass on the own NavigationController and have central class add an action (and style) to the leftBarButton

[self.navigationItem setLeftBarButtonItem:[actionsCollection setGenericBackButton:self.navigationController]];

核心类：

@interface ActionsCollection ()
@property(nonatomic, weak)UINavigationController *NavCtrl; // I do this since I dont seem to be able to pass the self.NavigationController on to the buttons action selector (se bellow).
@end

setGenericBackButton执行以下操作：

-(UIBarButtonItem *)setGenericBackButton:(UINavigationController *)NavContrl{
     _NavCtrl = NavContrl; // so that I can get a the global (to the class) UINavigationController being reached from -(IBAction)backButtonAction (see bellow)

     UIButton* myBackButton = [ButtonMaker BtnTypeBack]; //just returns a styled btn

//this is where it starts to fail - I want to pass the 'NavContrl' on with the selector bunt havnt figured out how (thats why the global variable '_NavContrl'
    [myBackButton addTarget:self action:@selector(backButtonAction) forControlEvents:UIControlEventTouchUpInside];

    UIBarButtonItem* BackBtnItem = [[UIBarButtonItem alloc]initWithCustomView:myBackButton];

}

backButtonAction执行以下操作：

-(IBAction)backButtonAction{
     [_NavCtrl popViewControllerAnimated:TRUE];
}

我是不是懒得尝试节省代码行，试图做不可能的事情，或者这真的可以做到吗？我很高兴能更好地解释这一点。

Answer 1

好的程序员是懒惰的。

也就是说，如果您正确设置了UINavigationController，它将添加自己的后退按钮，并为您完成此操作。除了[self.navigationController pushViewController:someViewController animated:YES];之外，您不需要任何代码