问题描述
对不起,我不能很好地解释自己。我真的是编程新手,而委托这个话题仍然困扰着我。我有一些很棒的帮助曾经有过一次,但是现在我试图在其他情况下使用委托,但我做对了。我拼凑了一些无效的代码,无论我搜索了多少代码,都找不到解决它的方法。
Sorry in advance that I can’t explain myself very well. I’m really new to programming and the topic of delegation still eludes me. I had some great help with this once before, but now I am trying to use a delegate in a different situation and I can’t get it right. I pieced together a bit of code that doesn’t work, and no matter how much I search I can’t find a way to fix it.
我在容器视图中有一个带有嵌入式视图控制器(EmbeddedController)的视图控制器(MainController)。我正在尝试让嵌入式控制器中的按钮操作容器视图(containerView)。
I have a view controller (MainController) with and embedded view controller (EmbeddedController) in a container view. I am trying to have a button in the embedded controller manipulate the container view (containerView).
EmbeddedController:
EmbeddedController:
protocol ControllerDelegate {
func hideContainerView()
}
class EmbeddedController: UIViewController {
var delegate: VControllerDelegate?
@IBAction func button(sender: AnyObject) {
delegate?.hideContainerView()
}
}
MainController:
MainController:
class MainController: UIViewController, ControllerDelegate {
@IBOutlet var containerView: UIView!
func hideContainerView() {
containerView.hidden = true
}
override func viewDidLoad() {
super.viewDidLoad()
var vc = EmbeddedController()
vc.delegate = self
}
}
有人知道我在做什么错吗?为什么这不起作用?
Does anyone have any idea what I am doing wrong? And why this isn’t working?
推荐答案
我最终要做的是将其添加到MainController中:
What I ended up doing is adding this to the MainController:
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if (segue.identifier == "mySegue") {
let vc = segue.destinationViewController as! EmbeddedController
vc.delegate = self
}
}
故事板中,我从MainController到EmbeddedController选择了segue,并将标识符设置为 mySegue。
In storyboard I selected the segue from the MainController to the EmbeddedController, and set the identifier to "mySegue".
在委托上方的代码没有返回nil的情况下。起初我没有研究此解决方案,因为我认为segue仅用于在视图控制器之间进行转换,而且在我看来,我并不认为嵌入式控制器是一种过渡。也许比我更有知识的人(这时几乎是这里的任何人)都可以解释这两者如何契合。
Without the code above the delegate kept returning nil. I didn't look into this solution at first as I thought segues were only for transitioning between view controllers, and in my mind I didn't see the embedded controller as a transition. Maybe someone more knowledgable than me (which is practically anyone on here at this point) can explain how this is all fitting together.
无论如何,这就是我解决的方法我的问题,希望其他人也可以从中受益:)
In any case, this is how I solved my issue and hopefully someone else can benefit from this as well :)
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