Avaudioplayer Initwithcontentsofurl Nil

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ios - AVAudioPlayer initWithContentsOfURL returns nil for ...

https://stackoverflow.com/questions/20104398/avaudioplayer-initwithcontentsofurl-returns-nil-for-aac-m4a-files

I use the following code to play an audio file. It plays fine for MP3 files, but when I try to play an AAC file, the [[AVAudioPlayer alloc] initWithContentsOfURL:] returns nil and I …

Could not initialize an instance of the type 'AVFoundation ...

https://social.msdn.microsoft.com/Forums/en-US/28eeda9e-6ee8-4049-9861-fa4b0e6a9cae/could-not-initialize-an-instance-of-the-type-avfoundationavaudioplayer

I tried with all the AVAudioPlayer contractors but all of them fail throwing this exception: Could not initialize an instance of the type 'AVFoundation.AVAudioPlayer': the native 'initWithContentsOfURL:error:' method returned nil. I will really appreciate any …

How To Play Sounds - AVAudioPlayer Tutorial (For 2019)

https://codewithchris.com/avaudioplayer-tutorial/

In this AVAudioPlayer tutorial, we’re going to go through an example of playing a sound file that you’ve added to your Xcode project. You’ll see that it’s actually a really simple task to accomplish! Adding the framework to your project The first thing we’ll need to do is to add the AVFoundation framework to the

AVAudioPlayer cannot play music with a NSTimer in background

https://www.py4u.net/discuss/2784061

Answer #2: before going to code. you need to tell the OS that you want permission to play music in background. you can do that by setting a Key in your app's info.plist. <key> UIBackgroundModes </key> <array> <string> audio </string> </array>. doing so, you will be able to play audio when app moves to background.

iOS AVAudioPlayer(音频播放) - 简书 - jianshu.com

https://www.jianshu.com/p/b6696495504b

iOS AVAudioPlayer(音频播放) AVAudioPlayer. 在iOS程序中，音频播放随处可见，有的声音只有1秒，有的声音好几分钟。iOS支持的音频格式AAC、ALAC、IMA4、linear、MP3。 AVAudioPlayer类用于回放音频数据。是一个易于使用的类，它提供了大量的功能。

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