将 imageView 添加到视图时不播放声音。我正在使用 AVAudioPlayer

Question

我将 Imageview 添加到视图后，声音立即停止播放。视图是持有者。如果我删除设置 Imageview 的属性和约束的代码，声音确实会播放。我唯一的猜测是我搞砸了约束......？最后一个方法，名为 configureUI()，是我尝试设置图像视图并为其提供约束的地方。顾名思义，这个图像视图是将要播放的当前歌曲的封面图像。

在此先感谢那些提供帮助的人。

import UIKit
import AVFoundation

class PLayerViewController: UIViewController {
    @IBOutlet var holder: UIView!
    var gabayArray = [Gabays]()
    var position: Int = 0
    
    var player: AVAudioPlayer?
    
    //user interface elements
    var coverImageView: UIImageView!
    var gabayName: UILabel!
    var gabyaaName: UILabel!

    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        configurePlayer()
        configureUI()
    }
    
    override func viewWillAppear(_ animated: Bool) {
        if let player = player {
            player.stop()
        }
        print("yo")
    }
    
    override func viewDidLayoutSubviews() {
        if holder.subviews.count == 0 {
            configure()
        }
        print("yooo")
    }

    func configurePlayer() {
        //set up player
        
        let gabay = gabayArray[position]
        let urlString = Bundle.main.path(forResource: gabay.gabayName, ofType: "mp3")
        
        do {
            try AVAudioSession.sharedInstance().setMode(.default)
            try AVAudioSession.sharedInstance().setActive(true, options: .notifyOthersOnDeactivation)
            
            guard let urlString = urlString else{return}
            
            player = try AVAudioPlayer(contentsOf: URL(string: urlString)!)
            guard let player = player else{return}
            player.play()
            print("zip it")
        }
        
        catch{
            print("error is: \(error.localizedDescription)")
        }
    }
    
    func configureUI() {
        
        //set up user interface
        let gabay = gabayArray[position]

        coverImageView = UIImageView()
        coverImageView.backgroundColor = .systemBlue
        coverImageView.image = UIImage(named: gabay.imageName)
        holder.addSubview(coverImageView)

        gabayName = UILabel()
        gabyaaName = UILabel()

        //set up constraints
        NSLayoutConstraint.activate([
            coverImageView.topAnchor.constraint(equalTo: holder.layoutMarginsGuide.topAnchor, constant: 20),
            coverImageView.leadingAnchor.constraint(equalTo: holder.layoutMarginsGuide.leadingAnchor, constant: 10),
            coverImageView.trailingAnchor.constraint(equalTo: holder.layoutMarginsGuide.trailingAnchor, constant: -10),
            coverImageView.widthAnchor.constraint(equalTo: holder.widthAnchor, multiplier: 0.8),
            coverImageView.heightAnchor.constraint(equalTo: holder.heightAnchor, multiplier: 0.5)
        ])
    }
}

Answer 1

重构这些部分

1- 将

translatesAutoresizingMaskIntoConstraints

设置为 imageView

coverImageView.translatesAutoresizingMaskIntoConstraints = false

2-删除这些代码

override func viewDidLayoutSubviews() {
    if holder.subviews.count == 0 {
        configure()
    }
    print("yooo")
}

&

override func viewWillAppear(_ animated: Bool) {
    if let player = player {
        player.stop()
    }
    print("yo")
}