为什么在viewDidLoad中没有执行SegueWithIdentifier工作？ [英] Why doesn't performSegueWithIdentifier work inside viewDidLoad?

问题描述

一旦在视图控制器上调用viewDidLoad，我就试图触发故事板segue。 segue附加了一个标识符，当从链接到按钮或其他控件的方法内部调用时，它可以正常工作。但它在viewDidLoad中不起作用。它只是默默地失败了。在viewDidLoad中是否有一些关于segue被忽略的规则？

I'm trying to trigger a storyboard segue as soon as viewDidLoad is called on a view controller. The segue has an identifier attached, and works fine when called from inside a method thats linked to a button or other control. But it doesn't work inside of viewDidLoad. It just silently fails. Is there some rule about segue's being ignored in viewDidLoad?

我试过这两个：

[self performSegueWithIdentifier: @"mySegue" 
                          sender: self];

这个：

[self dismissViewControllerAnimated:YES completion:^() {
[self performSegueWithIdentifier:@"mySegue" sender:self];
}];

两者均无效。

推荐答案

您无法关闭尚未显示的视图控制器。 didLoad 具有纯粹的内存管理功能，您可以将其用作（部分）构造函数。
可能有效的方法是在 viewDidAppear 中启动一个segue，但是我建议你在第一时间开始使用你想要的视图。

You can not dismiss a view controller that isn't presented yet. didLoad has purely memory management functions, you can use it as (part of a) constructor. What may work, is to start a segue in viewDidAppear, however I would suggest to start with the view you want at the first time.

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