Question

我正在尝试将声音添加到我正在编写的iOS应用中。我一直收到错误消息

“调用中的参数标签不正确（包含'contentsOfURL：错误：'，预期”contentsOfURL：fileTypeHint：'）“。

我试过用几种方法修补它，我无法建立它。这是我的代码：

import UIKit  import AVFoundation

class ViewController: UIViewController {

    var Setup = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("DMSetup", ofType: "mp3")!)
    var audioPlayer = AVAudioPlayer()

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

        audioPlayer = AVAudioPlayer(contentsOfURL: Setup, error: nil)
        audioPlayer.prepareToPlay()

    }

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

    @IBAction func PlayKeySetup(sender: UIButton) {
        audioPlayer.play()
    }


}

有什么建议吗？我是这里的新手，所以我肯定我错过了一些明显的东西。 xCode 7.3.1，OSX 10.11.4

感谢。

Answer 1

通常在属性名称中使用大写字母，它被视为不良态度，您应该使用setup

试试这段代码：

let setupUrl = NSBundle.mainBundle().URLForResource("DMSetup", withExtension: "mp3")
if (setupUrl == nil) {
   print("Could not find file: DMSetup.mp3")
   return
}
do { audioPlayer = try AVAudioPlayer(contentsOfURL: Setup!, fileTypeHint: nil) }
catch let error as NSError { print(error.description) }

if let player = audioPlayer {
     player.prepareToPlay()
}

Answer 2

试试这段代码：

var audioPlayer: AVAudioPlayer!

let path = NSBundle.mainBundle().pathForResource("yourfilename", ofType: "format")

let CREATE_ANY_VARIABLE = NSURL(fileURLWithPath: path!)

do {
        try audioPlayer = AVAudioPlayer(contentsOfURL: CREATE_ANY_VARIABLE)

} catch let error as NSError {
        print(error.debugDescription)
    }


audioPlayer.prepareToPlay()

然后你就可以在这个功能的任何地方玩！代码中的问题是var的名称与AVFoundation的另一个Setup方法重叠

将声音添加到iOS应用

2 个答案: