Question

如果我犯了任何错误，请告诉我，不要贬低这个问题。

这是我试图播放视频的问题，以下是代码

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")
    }
}

//查看控制器以启动视频播放器

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方法中我已经使用了urlString属性的静态url视频，它正常播放。我想从我的videoPlayerController类设置urlString属性我怎么能这样做？因为当我初始化

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。

Answer 1

只需使用所需参数创建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
}

如何在UIView的init方法中传递参数？

1 个答案: