Question

我有一个视图控制器，我在其中添加多个自定义视图。我想要做的是访问我动态添加的视图，并在某些触发器（如位置更新）上访问它。

如下所示...我已经简化了一些代码。但这应该会让你对我想要实现的目标有一个相当好的看法。

  class MapViewController: UIViewController, UIScrollViewDelegate, UITextFieldDelegate, CLLocationManagerDelegate {
     //my custom views
     var mapPins = Set<UserPin>()
     override func viewDidLoad() {
         createScreen()
         updateScreen() //this happens on location update
         super.viewDidLoad()
    }

    func createScreen() {

        let userPinA = UserPin(userID: "ab12319ssdf91dfa2js92kajsdf23kd93", name: "J smith", posX: Int(1500), posY: Int(1800), pictureURL: "sad_face.jpg", direction: 1, colour: "Red", currentTrack: 33, lastTimeConnected: Date())
        mapPins.insert(userPinB)

        //this is actually done dynamically but good enough for the example
        mapPins.insert(userPinB)
        mapPins.insert(userPinC)
        mapPins.insert(userPinD)

        containerView = UIView()

        // adding is not a problem. So far so good!
        for userpin in mapPins
        {
            imageView.addSubview(userpin)
        }

        containerView.addSubview(imageView)
        scrollView.addSubview(containerView)
        view.addSubview(scrollView)
    }

    //triggered on location update, just believe it fires for the purpose of this
    func updateScreen()
    {
        //Here is the issue!
        //I want to get to the right view by userID, the same that is updated on my mapPins set, and update the posX and posY (animation is the intention). How do I do that?
        //something like self.view.subviews.view.userID, obviously that does not work. I just don't think I understand enough how custom views work to access the properties of them.

    }

这是我的自定义视图的外观。正如您可以看到它的简单视图。 userID字段是我真正感兴趣的字段。

 import UIKit

    class UserPin: UIView {


        var userID : String?
        var name : String?
        var posX : Int?
        var posY : Int?
        var pictureURL : String?
        var direction : Int?
        var colour : String?
        var currentTrack : Int?
        var lastTimeConnected : Date?

        init(userID: String, name: String, posX: Int, posY: Int, pictureURL: String, direction: Int, colour: String, currentTrack : Int, lastTimeConnected : Date)
        {
            self.userID = userID
            self.name = name
            self.posX = posX
            self.posY = posY
            self.pictureURL = pictureURL
            self.direction = direction
            self.colour = colour
            self.currentTrack = currentTrack
            self.lastTimeConnected = lastTimeConnected

            super.init(frame: CGRect(x: posX, y: posY, width: 100, height: 100))
            self.addControls(userID, name: name, posX: posX, posY: posY,  pictureURL: pictureURL, direction: direction,  colour: colour,  currentTrack: currentTrack, lastTimeConnected: lastTimeConnected)
        }
     func addControls(_ userID: String, name: String, posX: Int, posY: Int, pictureURL: String, direction: Int, colour: String, currentTrack : Int, lastTimeConnected : Date) {
    //does stuff on the view with labels and shapes and stuff
    }

Answer 1

您可以在视图控制器中创建Dictionary，其中密钥为userID，对象为customView s

如果有许多自定义视图，则效率会更高，因为Array必须经常迭代。

如何通过自定义字段查找自定义视图

1 个答案: