blocks|key|2931496|text|这样做的步骤。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2931497|容器视图必须包含子视图控制器的嵌入segue，该子视图控制器的名称如下所示."homeToContainer“(见附图)|ordered-list-item|2931498|📷|atomic|offset|length|2931499|​|2931500|将此方法添加到父视图控制器(DiaryEntryViewController+)
重写func准备(用于segue:+UIStoryboardSegue，发件人:+Any?)+{如果让vc+=+segue.destination+as？ChildViewController，segue.identifier+==+"homeToContainer“{+vc.delegate+=+self+}|2931501|在ChildViewController中添加协议及其变量：
protocol+ChildToParentProtocol:class+{+func+buttonClickedByUser()+func+needToPassInfoToParent(带有值:Int)}类ChildViewController:+UIViewController+{弱var委托:ChildToParentProtocol？=+nil+@IBAction+func+createTourPressed(_发件人:+UIButton)+{+//+Call+here委托方法告诉父级delegate?.buttonClickedByUser()+}}|2931502|在父ViewController中的最后一个部分中，添加以下扩展：
扩展DiaryEntryViewController:ChildToParentProtocol+{+func+buttonClickedByUser()+{}+func+needToPassInfoToParent(带值:Int){}|2931503|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://developer.qcloudimg.com/http-save/yehe-900000/be00d6d0dcd7762c01e4c514739d330a.png|imageAlt^0|0|0|0|1|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|11|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|12|8|@]|9|@$H|13|I|14|1|15]]|A|$]]|$1|J|3|K|5|6|7|16|8|@]|9|@]|A|$]]|$1|L|3|M|5|D|7|17|8|@]|9|@]|A|$]]|$1|N|3|O|5|D|7|18|8|@]|9|@]|A|$]]|$1|P|3|Q|5|D|7|19|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]]|S|$T|$5|U|V|W|A|$X|Y|Z|-4]]]]

Steps to do that.

<ol>
<li>Your container view must contain a embed segue to the child view controller, name that segue something like this.... "homeToContainer" (See the attached Image)
<a href="https://i.stack.imgur.com/mfOAs.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/mfOAs.png" alt="Add Embed segue name"></a></li>
<li>Add this method to your parent View controller (DiaryEntryViewController )

<pre><code>override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
 if let vc = segue.destination as? ChildViewController,
 segue.identifier == "homeToContainer" {
 vc.delegate = self
 }
}
</code></pre></li>
<li>Add Protocol and its variable in ChildViewController:

<pre><code> protocol ChildToParentProtocol:class {


 func buttonClickedByUser()
 func needToPassInfoToParent(with value:Int)

 }


 class ChildViewController: UIViewController {

 weak var delegate:ChildToParentProtocol? = nil

 @IBAction func createTourPressed(_ sender: UIButton) {
 // Call here delegate methods to tell parent about the action
 delegate?.buttonClickedByUser()

 }

 }
</code></pre></li>
<li>In the last in your parent ViewController, add this Extension: 

<pre><code> extension DiaryEntryViewController:ChildToParentProtocol {

 func buttonClickedByUser() {

 }
 func needToPassInfoToParent(with value:Int) {


 }
 }
</code></pre></li>
</ol>

blocks|key|2931543|text|如果以编程方式添加容器视图，则应使用回调从容器视图获取返回值到父视图。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2931544|父控制器：|offset|length|style|BOLD|2931545|let+containerView+=+UIView()
containerView.translatesAutoresizingMaskIntoConstraints+=+false
view.addSubview(containerView)

NSLayoutConstraint.activate([
++++containerView.leadingAnchor.constraint(equalTo:+view.leadingAnchor,+constant:+0),
++++containerView.trailingAnchor.constraint(equalTo:+view.trailingAnchor,+constant:+0),
++++containerView.topAnchor.constraint(equalTo:+headerView.bottomAnchor,+constant:+0),
++++containerView.bottomAnchor.constraint(equalTo:+view.bottomAnchor,+constant:+0),
++++])

let+controller+=+YourViewController(nibName:+"YourNibView",+bundle:+nil)

//This+is+important+to+get+value+back+and+also+define+callback+to+container+view+call+as+well
controller.callback+=+{+result+in
++++self.isCardJoinedFromJoinScreen+=+true
++++self.viewWillAppear(true)
}
addChild(controller)
controller.view.translatesAutoresizingMaskIntoConstraints+=+false
containerView.addSubview(controller.view)

NSLayoutConstraint.activate([
++++controller.view.leadingAnchor.constraint(equalTo:+containerView.leadingAnchor),
++++controller.view.trailingAnchor.constraint(equalTo:+containerView.trailingAnchor),
++++controller.view.topAnchor.constraint(equalTo:+containerView.topAnchor),
++++controller.view.bottomAnchor.constraint(equalTo:+containerView.bottomAnchor)
++++])|code-block|syntax|javascript|2931546|容器视图控制器|2931547|定义此回调|2931548|var+callback+:+((Bool)->())?|2931549|当您将值传递给父控制器时，请调用以下回调|2931550|self.callback?(true)+or+self.callback?(false)|2931551|entityMap^0|0|0|5|0|0|0|7|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@$D|10|E|11|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|12|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|13|8|@$D|14|E|15|F|G]]|9|@]|A|$]]|$1|O|3|P|5|6|7|16|8|@]|9|@]|A|$]]|$1|Q|3|R|5|J|7|17|8|@]|9|@]|A|$K|L]]|$1|S|3|T|5|6|7|18|8|@]|9|@]|A|$]]|$1|U|3|V|5|J|7|19|8|@]|9|@]|A|$K|L]]|$1|W|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]]|X|$]]

If you added container view programmatically, you should use call back to get back values from container view to parent view.

Parent Controller: 

<pre><code>let containerView = UIView()
containerView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(containerView)

NSLayoutConstraint.activate([
 containerView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 0),
 containerView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: 0),
 containerView.topAnchor.constraint(equalTo: headerView.bottomAnchor, constant: 0),
 containerView.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: 0),
 ])

let controller = YourViewController(nibName: "YourNibView", bundle: nil)

//This is important to get value back and also define callback to container view call as well
controller.callback = { result in
 self.isCardJoinedFromJoinScreen = true
 self.viewWillAppear(true)
}
addChild(controller)
controller.view.translatesAutoresizingMaskIntoConstraints = false
containerView.addSubview(controller.view)

NSLayoutConstraint.activate([
 controller.view.leadingAnchor.constraint(equalTo: containerView.leadingAnchor),
 controller.view.trailingAnchor.constraint(equalTo: containerView.trailingAnchor),
 controller.view.topAnchor.constraint(equalTo: containerView.topAnchor),
 controller.view.bottomAnchor.constraint(equalTo: containerView.bottomAnchor)
 ])

</code></pre>

Container View Controller 
define this callback

<pre><code>var callback : ((Bool)-&gt;())?
</code></pre>

and at the point when you pass value to parent controller call this callback like 

<pre><code>self.callback?(true) or self.callback?(false)
</code></pre>

Im new to swift and i would like pass an array from my container view to parent view.I have created the container view using story board, but the container view appears and disappears programatically as shown below:

<pre><code>//in parent view controller, inside viewDidLoad()
CameraView.isHidden = true

//in child view controller, on click of button,
let parent = self.parent as! DiaryEntryViewController
parent.CameraView.isHidden = true
</code></pre>

I want the data selected to be shown whenever i click the button to display container view.
I don't know how to pass values from child view controller to parent view controller and where can I should be able to access the values.These values need to accessed inside a function which is called on click of another button inside parent view controller.

Pass values from container view to parent view controller

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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问将值从容器视图传递给父视图控制器
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