navigationController中viewWillAppear，viewDidAppear，viewWillDisappear和viewDidDisappeart调用问题

最新推荐文章于 2024-03-28 09:46:04 发布

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#uinavigationcontroller #login #interface

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当UIViewController被加入到[UIApplication sharedApplication].keyWindow时，viewWillAppear，viewDidAppear等方法才会被调用。为了解决push进去的UIViewController的生命周期方法调用，可以尝试设置导航控制器的代理或者在didFinishLaunchingWithOptions中直接将UINavigationController的view添加到window上，避免添加到其他View上。

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问题viewWillAppear，viewDidAppear，viewWillDisappear和viewDidDisappeart没有被调用。

原因是这个UIViewController需要添加到[UIApplication sharedApplication].keyWindow才会被调用。那如何满足需要那些被push进去的UIViewController的viewWillAppear和viewDidAppear的调用呢。

１.添加代理

@interface landpokerViewController : UIViewController <UINavigationControllerDelegate>
{
	UINavigationController* _gamePageManage;
}

2.添加VIEW

        LoginViewController* login = [[LoginViewController alloc] initWithNibName:@"LoginViewController" bundle:nil];
        _gamePageManage = [[UINavigationController alloc] initWithRootViewController:login];
        [login release];
        _gamePageManage.delegate = self;
        [self.view addSubview:_gamePageManage.view];

3.添加代理代码

- (void)navigationController:(UINavigationController *)navigationController 
      willShowViewController:(UIViewController *)viewController animated:(BOOL)animated 
{
    [viewController viewWillAppear:animated];
}

- (void)navigationController:(UINavigationController *)navigationController 
       didShowViewController:(UIViewController *)viewController animated:(BOOL)animated 
{
    [viewController viewDidAppear:animated];
}

以上方面解决了viewWillAppear，viewDidAppear，但是没有解决viewWillDisappear和viewDidDisappeart。

如果要彻底这个问题，使用以下代码

在didFinishLaunchingWithOptions把UINavigationController的view直接加到window上，不要间接的加到其他View上。

    if (!_gamePageManage)
    {
        //栈顶
        LoginViewController* login = [[LoginViewController alloc] initWithNibName:@"LoginVie
        
        _gamePageManage = [[UINavigationController alloc] initWithRootViewController:login];
        [PageManage sharePageManage].navigation = _gamePageManage;
        [login release];
        [window addSubview:_gamePageManage.view];
    }
    
    
    [window makeKeyAndVisible];