如何在iOS 8中关闭两个UIViewControllers？ [英] How to dismiss two UIViewControllers in iOS 8?

问题描述

我正在使用Objective C处理iPhone应用程序。因为我需要同时关闭两个UIViewControllers，所以我使用下面的代码：

I am working on iPhone application using Objective C. As I need to dismiss two UIViewControllers at once, so I am using below code :

[self.presentingViewController.presentingViewController dismissViewControllerAnimated:YES completion:nil];

此代码在iOS6和iOS7中运行良好，但在iOS8中无效。我已经使用断点检查，我的ViewController viewDidLoad和viewWillAppear方法正在调用，但我的视图根本没有加载，所以作为输出，我得到空白的白色屏幕。任何人都可以帮助我，对于iOS8，我该如何解决这个问题，我是否需要使用presentViewController而不是presentViewController？

This code is working fine in iOS6 and iOS7, but it is not working in iOS8. I have checked by using breakpoint, my ViewController viewDidLoad and viewWillAppear method is calling but my view is not loading at all, so as an output, I am getting blank white screen. Can anyone please help me that for iOS8, how can I solve this problem, should I need to use presentedViewController instead of presentingViewController?

推荐答案

Swift代码

@IBAction func goBack(sender: AnyObject) {
    var tmpController :UIViewController! = self.presentingViewController;

    self.dismissViewControllerAnimated(false, completion: {()->Void in
        println("done");
         tmpController.dismissViewControllerAnimated(false, completion: nil);
    });
}

示例项目

---

目标代码

- (IBAction)goBack:(id)sender {

    UIViewController *trmpVC = self.presentingViewController;

    [self dismissViewControllerAnimated:NO completion:^{
        [trmpVC dismissViewControllerAnimated:NO completion:nil];
    }];
}

示例项目

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