如何在removefromsuperview後執行方法

Question

我有一個使用我的showNewView方法通過我的主UIViewController（稱爲MainUIVC）加載的UIViewController（稱爲SubUIVC），當我完成SubUIVC時，使用goBack返回MainUIVC方法。

我希望做的是在MainUIVC執行一些代碼一次GoBack方法完成，我的MainUIVC.view已經加載。

任何人都可以幫助我做到這一點？以下是我上面提到的兩種方法。

-(void) showNewView:(UIViewController*)showView{  
UIView *currentView = self.view; 

    // get the the underlying UIWindow, or the view containing the current view 
    UIView *theWindow = [currentView superview];  
    UIView *newView = showView.view; 

    // remove the current view and replace with newView 
    [theWindow addSubview:newView]; 

    // set up an animation for the transition between the views 
    CATransition *animation = [CATransition animation]; 
    [animation setDuration:WIPE_ANIMATION_DURATION]; 
    [animation setType:kCATransitionPush]; 
    [animation setSubtype:kCATransitionFromRight]; 
    [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]]; 

    [[theWindow layer] addAnimation:animation forKey:@"SwitchToNewView"]; 
} 

-(IBAction)goBack:(id)sender{  
    UIView *currentView = self.view; 

    // get the the underlying UIWindow, or the view containing the current view 
    UIView *theWindow = [currentView superview]; 

    // remove the current view and replace with superview 
    [currentView removeFromSuperview]; 

    // set up an animation for the transition between the views 
    CATransition *animation = [CATransition animation]; 
    [animation setDuration:WIPE_ANIMATION_DURATION]; 
    [animation setType:kCATransitionPush]; 
    [animation setSubtype:kCATransitionFromLeft]; 
    [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]]; 

    [[theWindow layer] addAnimation:animation forKey:@"SwitchToNewView"]; 
} 

Answer 1

在MainController中有一個BOOL屬性比通過goBack：function設置的BOOL屬性。

在主控制器的viewDidAppear :,檢查BOOL，看看是否認爲只是表現爲GoBack的結果：被調用，並做你的事。顯然你應該重置該標誌。