如何从子视图导航到mainviewcontroller [英] How can i navigate to mainviewcontroller from subview

问题描述

我刚刚开始使用swift，我创建了一个子视图，上面有一个按钮，我想使用该按钮将我带到我的mainviewcontroller。

I have just started working with swift, i have created a subview which has a button on it, i would like to use that button to take me to my mainviewcontroller.

我对不同的按钮使用了相同的功能，但是在同一个文件中有一个功能允许该按钮工作，代码在下面

i have used same functionality for a different button however having a function in same file allows that button to work the code is below

var playAgainButton = UIButton(frame: CGRectMake(0, 150, 320, 40))
            playAgainButton.setTitle("Play Again", forState: UIControlState.Normal)
            playAgainButton.addTarget(self, action: Selector("startGame"), forControlEvents: UIControlEvents.TouchUpInside)
            playAgainButton.backgroundColor = UIColor.redColor()
            gameOver.addSubview(playAgainButton)

是否可以使用类似的代码导航到不同的viewcontroller？

is it possible to use similar code to navigate to a different viewcontroller?

谢谢

推荐答案

您使用的是故事板，还是全部都是代码？如果它在代码中，请创建一个方法，如

Are you using storyboards, or is this all in code? If it's in code, create a method like

func goToMainVC() {
    if let navController = self.navigationController {
        navController.popToRootViewControllerAnimated(true)
    }
}

和将按钮的目标设置为调用它的选择器。

and set the button's target to a selector that calls it.

如果您使用的是故事板，则有三种选择：

If you're using storyboards, you have three options:

1. 按住ctrl +将连接从按钮拖回主视图控制器（简单但形状不好，因为它只是将主VC推回导航控制器）;


2. 在上面的 fun goToMainVC（）方法之前添加 @IBAction ，然后按ctrl +拖动连接你的按钮到它所包含的视图控制器，然后选择那个插座方法（大多数人都这样做）;或


3. 最好的选择是使用展开segue，如此处。

1. ctrl+drag a connection from your button back to the main view controller (easy, but bad form because it just pushes the main VC back onto the nav controller);
2. Add @IBAction before the fun goToMainVC() method above, then ctrl+drag a connection from your button to the view controller in which it's contained, and then select that outlet method (this is how most people would do it); or
3. The best option is to use an unwind segue, as described here.

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