使用AVAudioPlayer iOS 7播放音频

本文介绍了使用AVAudioPlayer iOS 7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

我正在努力遵循Apple有关使用 AVAudioPlayer 类播放小型$ code> .wav 文件的文档。我也不确定基本音频播放需要什么工具箱。到目前为止我已导入：

I'm struggling to follow Apple's documentation regarding playing back a small .wav file using the AVAudioPlayer class. I'm also not sure what toolboxes I need for basic audio playback. So far I have imported:

AVFoundation.framework CoreAudio.framework AudioToolbox.framework

这是我的代码 .h 和 .m ：

#import <UIKit/UIKit.h> #import <AVFoundation/AVFoundation.h> @interface ViewController : UIViewController <AVAudioPlayerDelegate> - (IBAction)playAudio:(id)sender; @end #import "ViewController.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. } - (IBAction)playAudio:(id)sender { NSLog(@"Button was Pressed"); NSString *filePath = [[NSBundle mainBundle] pathForResource:@"XF_Loop_028" ofType:@"wav"]; NSURL *fileURL = [[NSURL alloc] initFileURLWithPath:filePath]; // create new audio player AVAudioPlayer *myPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:fileURL error:nil]; [myPlayer play]; } @end

我似乎没有有任何错误。但是，我没有收到任何音频。

I don't seem to have any errors. However, I am not getting any audio.

推荐答案

您在这里遇到ARC问题。当myPlayer超出范围时，它正在被清理。创建一个强大的属性，分配AVAudioPlayer，你可能已经全部设置好了！

You're having an ARC issue here. myPlayer is being cleaned up when it's out of scope. Create a strong property, assign the AVAudioPlayer and you're probably all set!

@property(nonatomic, strong) AVAudioPlayer *myPlayer; ... // create new audio player self.myPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:fileURL error:nil]; [self.myPlayer play];