AVAudioPlayer不在Swift播放音频

AVAudioPlayer不在Swift播放音频

本文介绍了AVAudioPlayer不在Swift播放音频的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我有一个非常简单的单一视图中的代码Swift应用程序在我的 ViewController

I have this code in a very simple, single view Swift application in my ViewController:

var audioPlayer = AVAudioPlayer()

@IBAction func playMyFile(sender: AnyObject) {

    let fileString = NSBundle.mainBundle().pathForResource("audioFile", ofType: "m4a")
    let url = NSURL(fileURLWithPath: fileString)
    var error : NSError?
    audioPlayer = AVAudioPlayer(contentsOfURL: url, error: &error)
    audioPlayer.delegate = self
    audioPlayer.prepareToPlay()
    if (audioPlayer.isEqual(nil)) {
        println("There was an error: (er)")
    } else {
        audioPlayer.play()
        NSLog("working")
    }

我已添加 import AVFoundation audioPlayer 是一个全局变量。当我执行代码,它打印工作,所以它使通过没有错误,但没有声音播放。

I have added import AVFoundation and audioPlayer is a global variable. When I execute the code, it does print "working", so it makes it through without errors but no sound is played. The device is not in silent.

推荐答案

你的代码有很多错误,Socratic方法崩溃了,它可能是最简单的只是抛出它并显示你:

There's so much wrong with your code that Socratic method breaks down; it will probably be easiest just to throw it out and show you:

var player : AVAudioPlayer! = nil // will be Optional, must supply initializer

@IBAction func playMyFile(sender: AnyObject?) {
    let path = NSBundle.mainBundle().pathForResource("audioFile", ofType:"m4a")
    let fileURL = NSURL(fileURLWithPath: path)
    player = AVAudioPlayer(contentsOfURL: fileURL, error: nil)
    player.prepareToPlay()
    player.delegate = self
    player.play()
}

做任何错误检查,但是如果有问题,上方是你会崩溃。

I have not bothered to do any error checking, but the upside is you'll crash if there's a problem.

一个最后一点,它可能或可能不相关:不是每个 m4a 文件可以播放。例如,高度压缩的文件可能会失败(双关语)。

One final point, which may or may not be relevant: not every m4a file is playable. A highly compressed file, for example, can fail silently (pun intended).

这篇关于AVAudioPlayer不在Swift播放音频的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

07-23 01:13