Avaudioplayer Alloc Initwithcontentsofurl Error

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(iOS) Why does AVAudioPlayer initWithContentsOfURL …

https://stackoverflow.com/questions/9462728/ios-why-does-avaudioplayer-initwithcontentsofurl-always-fail-with-error-code

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ios - AVAudioPlayer initWithContentsOfURL returns nil for ...

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

It plays fine for MP3 files, but when I try to play an AAC file, the [ [AVAudioPlayer alloc] initWithContentsOfURL:] returns nil and I get the following error: Error Domain=NSOSStatusErrorDomain Code=1937337955 "The operation couldn’t be completed. (OSStatus error 1937337955.)" The audio file plays fine on Mac and iPhone (when I email it to …

How To Play Sounds - AVAudioPlayer Tutorial (For 2019)

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

_audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:soundUrl error:nil]; 2 times but i changed the _audioplayer to another name. But then they said an error saying that redefinition of “path” and “soundUrl”!

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.

AVAudioPlayer常用属性_majiakun1的专栏-程序员宝宝 - 程序员宝宝

https://cxybb.com/article/majiakun1/17188295

要使用 AVAudioPlayer 的对象播放文件，你只需为其指定一个音频文件并设定一个实现了AVAudioPlayerDelegate 协议的 delegate 对象。初始化;1:initWithData:error:他使用一个指向内存中一些音频数据的NSData对象. 这种形式对于已经把音频数据下载到缓冲区的情形很有用.initWithContentsOfURL:

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