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  • UINavigationController检测后退按钮被按下

    Objective-c代码 复制代码 收藏代码
    1. -(void) viewWillDisappear:(BOOL)animated    
    2. {   
    3.     if ([self.navigationController.viewControllers indexOfObject:self]==NSNotFound)    
    4.     {   
    5.         // back button was pressed.  We know this is true because self is no longer   
    6.         // in the navigation stack.     
    7.         NSLog(@"viewWillDisappear:(BOOL)animated ");   
    8.         if(request)   
    9.         {   
    10.             [request clearDelegatesAndCancel];   
    11.             request.delegate = nil;   
    12.             [request release];   
    13.             request = nil;   
    14.         }   
    15.     }   
    16.     [super viewWillDisappear:animated];   
    17. }  
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  • 原文地址:https://www.cnblogs.com/zhwl/p/2633498.html
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