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objective c - iOS App build fails with undeclared ...
https://stackoverflow.com/questions/70612619/ios-app-build-fails-with-undeclared-identifier-avaudiosession
AppDelegate.m:59:5: Use of undeclared identifier 'AVAudioSession'. I've tried cleaning the build folder and re-building to no avail. This answer and this answer are mistaken attempts to build an app for Mac. But as far as I know, this all for iOS: This answer claims that I need to add AudioToolBox.Framework and import it as well.
AVAudioPlayer Class (AVFoundation) | Microsoft Docs
https://docs.microsoft.com/en-us/dotnet/api/avfoundation.avaudioplayer
An instance of the AVFoundation.IAVAudioPlayerDelegate model class which acts as the class delegate. Description of the object, the Objective-C version of ToString. A value that increases while the AVAudioPlayer is playing or paused. Used for synchronizing multiple audio players.
Apple Developer Documentation
https://developer.apple.com/documentation/avfaudio/avaudioplayer
class AVAudioPlayer: NSObject. Overview. Use an audio player to: Play audio of any duration from a file or buffer. Control the volume, panning, rate, and looping behavior of the played audio. Access playback-level metering data. Play multiple sounds simultaneously by synchronizing the playback of multiple players.
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
错误：'fxVolumeSlider'未声明（首次使用此函数） - 需要声 …
https://www.itdaan.com/blog/2011/06/09/79605d1dd49e88ea28be4716e2428607.html
warning: 'AVAudioPlayer' may not respond to '-setFxVolume:' 警告：'AVAudioPlayer'可能无法响应'-setFxVolume：' So everytime i play the play button, i try to adjust the volume but i get kicked out of the app. 因此，每当我播放播放按钮时，我都会尝试调整音量但我会被踢出应用程序. 2 个解决方案
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