MonoTouch的：播放声音 [英] MonoTouch: Playing sound

问题描述

我想，当用户点击特定的按钮来播放一短声。但问题是，我总是收到对象引用未设置为一个实例对象。指空！

I am trying to play a short sound when user taps on the specific button. But the problem is that I always receive Object reference not set to an instance object. means Null!

我第一次尝试MonoTouch.AudioToolBox.SystemSound。

I first tried MonoTouch.AudioToolBox.SystemSound.

MonoTouch.AudioToolbox.AudioSession.Initialize();   
MonoTouch.AudioToolbox.AudioSession.Category = MonoTouch.AudioToolbox.AudioSessionCategory.MediaPlayback;   
MonoTouch.AudioToolbox.AudioSession.SetActive(true);   

var t = MonoTouch.AudioToolbox.SystemSound.FromFile("click.mp3");
t.PlaySystemSound();

让我注意到，click.mp3是我的根文件夹的解决方案，它被标记为内容。
中的另一种方法是 MonoTouch.AVFoundation.AVAudioPlayer 。

Let me notice that "click.mp3" is in my root solution folder and it is flagged as Content. The other approach is MonoTouch.AVFoundation.AVAudioPlayer.

var url = NSUrl.FromFilename("click.mp3");
AVAudioPlayer player = AVAudioPlayer.FromUrl(url);
player.FinishedPlaying += (sender, e) => { player.Dispose(); };
player.Play();

但同样的错误。我GOOGLE了它，我看到很多人有这个问题。我们需要知道它是否是一个错误或没有。

But same error. I googled it and I see that many people has this problem. We need to know whether it is a bug or not.

推荐答案

您的代码看起来是正确的（我比较的代码的这里，这是能够播放音频）。

Your code looks correct (I compared to the code here, which is able to play audio).

什么可能是问题是，音频文件不包含在该应用束不知。您可以轻松地使用此代码检查：

What might be the problem is that the audio file isn't included in the app bundle somehow. You can easily check it with this code:

if (!System.IO.File.Exists ("click.mp3"))
    Console.WriteLine ("bundling error");

这篇关于MonoTouch的：播放声音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IT屋！