将数据传递给嵌入在容器视图中的视图控制器

Question

我的视图控制器只需要传递一个名为“otherUser”的 NSDictionary。我正在使用分段控制器方便地向使用容器视图的用户呈现其中的 4 个视图。我知道所有这些视图将同时加载并保持加载状态，这就是我想要的，即使会占用内存。我知道如何直接将此值传递给视图控制器，但不知道如何将其传递给视图控制器，然后将其传播到 4 个视图以加载相同的数据。 ---- 下面是我根据搜索栏操作将“otherUser”传递给“BusinessProfileSwitchView”（带有容器视图的视图控制器）。

 override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    super.prepare(for: segue, sender: sender)
    if segue.identifier == "BusinessProfiles" {
        // gotta check if we're currently searching
        if self.searchController.isActive && searchController.searchBar.text != "" {
            if let indexPath = tableView.indexPathForSelectedRow {
                let user = filteredUsers[indexPath.row]
                let controller = segue.destination as? BusinessProfileSwitchView
                controller?.otherUser = user
            }
        } else {
            if let indexPath = tableView.indexPathForSelectedRow {
                let user = usersArray[indexPath.row]
                let controller = segue.destination as? BusinessProfileSwitchView
                controller?.otherUser = user
            }
        }
    }
}

你们认为我应该使用什么攻击方法将“otherUser”/NSDictionary 传递给带有容器视图的视图控制器，然后将“otherUser”传播到 4 个视图？下面是我连接到其他 4 个视图的视图控制器。

 import UIKit

 class BusinessProfileSwitchView: UIViewController {

@IBOutlet weak var feedView: UIView!
@IBOutlet weak var collectionView: UIView!
@IBOutlet weak var infoView: UIView!
@IBOutlet weak var socialView: UIView!

var infos: BusinessProfilesDetails!
var collections: BusinessProfilePostsCollection!
var feeds: BusinessProfilePostsFeed!
var socials: BusinessProfilesViewController!

@IBOutlet weak var switchController: UISegmentedControl!

var otherUser: NSDictionary!

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    switch  switchController.selectedSegmentIndex {
    case 0:
        infoView.isHidden = false
        feedView.isHidden = true
        collectionView.isHidden = true
        socialView.isHidden = true
        break
    case 1:
        infoView.isHidden = true
        feedView.isHidden = true
        collectionView.isHidden = false
        socialView.isHidden = true
        break
    case 2:
        infoView.isHidden = true
        feedView.isHidden = false
        collectionView.isHidden = true
        socialView.isHidden = true
        break
    case 3:
        infoView.isHidden = true
        feedView.isHidden = true
        collectionView.isHidden = true
        socialView.isHidden = false
        break
    default:

        break;
    }
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

@IBAction func viewControl(_ sender: UISegmentedControl) {
    switch  switchController.selectedSegmentIndex {
    case 0:
        infoView.isHidden = false
        feedView.isHidden = true
        collectionView.isHidden = true
        socialView.isHidden = true
        break
    case 1:
        infoView.isHidden = true
        feedView.isHidden = true
        collectionView.isHidden = false
        socialView.isHidden = true
        break
    case 2:
        infoView.isHidden = true
        feedView.isHidden = false
        collectionView.isHidden = true
        socialView.isHidden = true
        break
    case 3:
        infoView.isHidden = true
        feedView.isHidden = true
        collectionView.isHidden = true
        socialView.isHidden = false
        break
    default:

        break;
    }
}

}

Answer 1

在您的 Storyboard 中，当您在 ContainerView 中嵌入 VC 时，您还会看到一个“segue”连接器。当根 VC 加载时，您将接到一个电话，准备为此进行 segue。

给每个故事板创建的 segue 一个标识符 - 例如“infoViewEmbedSegue”、“feedViewEmbedSegue”等。

我猜在你的根 VC 中

var infos: BusinessProfilesDetails!
var feeds: BusinessProfilePostsFeed!

是引用infoView内容的变量吗？如果是这样，请在 prepare() 中：

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

    // get a reference to the embedded PageViewController on load

    if let vc = segue.destination as? BusinessProfilesDetails,
        segue.identifier == "infoViewEmbedSegue" {
        self.infos = vc
        // if you already have your data object
        self.infos.otherUser = theDataDict
    }

    if let vc = segue.destination as? BusinessProfilePostsFeed,
        segue.identifier == "feedViewEmbedSegue" {
        self.feeds = vc
        // if you already have your data object
        self.feeds.otherUser = theDataDict
    }

    // etc

}

现在您将拥有对嵌入在容器视图中的实际视图控制器的持久引用，以防您想在根 VC 的其他部分访问它们，例如：

@IBAction func btnTapped(_ sender: Any) {
    self.feeds.otherUser = theDataDict
}