如何在 UIView 的 init 方法中传递参数？答案

【问题标题】：how to pass parameter in init method of UIView?如何在 UIView 的 init 方法中传递参数？
【发布时间】：2018-02-24 12:26:36
【问题描述】：

如果我犯了任何错误，请告诉我，不要沮丧。

这是我试图播放视频的问题，下面是代码

import UIKit
import AVFoundation

// custom UIView to display frame for avplayer

class VideoPlayerView: UIView {

    let urlString String?

    override init(frame: CGRect) {
        super.init(frame: frame)

        backgroundColor = .blackColor()

        //static url for video

        urlString = "https://firebasestorage.googleapis.com/v0/b/gameofchats-762ca.appspot.com/o/message_movies%2F12323439-9729-4941-BA07-2BAE970967C7.mov?alt=media&token=3e37a093-3bc8-410f-84d3-38332af9c726"
        if let url = NSURL(string: urlString) {
            let player = AVPlayer(URL: url)

            let playerLayer = AVPlayerLayer(player: player)
            self.layer.addSublayer(playerLayer)
            playerLayer.frame = self.frame

            player.play()
        }

    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

// 视图控制器启动视频播放器

class VideoPlayerController: UIViewController {

    var message: Messages?{
        didSet{

        }
    }


    let overlayView: UIView = {
        let view = UIView()
        view.isUserInteractionEnabled = true
        view.backgroundColor = UIColor(white: 0, alpha: 0.5)
        return view
    }()


    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = .black

                let height = view.frame.width * 9 / 16
        let videoPlayerFrame = CGRect(x: 0, y: 0, width: view.frame.width, height: height)

        let videoPlayerView = VideoContainerView(frame: videoPlayerFrame)
        view.addSubview(videoPlayerView)

        videoPlayerView.center = view.center

    }

在 VideoPlayerView 的 init 方法中，我将视频的静态 url 用于播放正常的 urlString 属性。我想从我的 videoPlayerController 类中设置 urlString 属性，我该怎么做？因为当我初始化时

let view = VideoPlayerView(frame:frame) // this code will call init method before i can set the urlString property.

任何人都知道如何做到这一点。请帮忙。提前感谢您的任何建议。

【问题讨论】：

标签： ios uiview swift4 init

【解决方案1】：

只需使用所需参数制作其他初始化程序并调用它。

convenience init(frame: CGRect, urlString: String) {
    self.init(frame: frame)
    //make here what you want
}

【讨论】：