Question

我正在使用AVFoundation来播放wav文件。但我无法发挥它。也没有出现任何错误或警告。

XCode是4.2，设备是iOS 5.

- (IBAction) playSelectedAlarm:(id)sender {

UIButton *button = (UIButton *)sender;

int bTag = button.tag;

NSString *fileName = [NSString stringWithFormat:@"%d23333", bTag];

NSLog(@"%@", fileName);

NSString *path = [[NSBundle mainBundle] pathForResource:fileName ofType:@"wav"];

NSURL *fileURL = [[NSURL alloc] initFileURLWithPath: path];

AVAudioPlayer *theAudio=[[AVAudioPlayer alloc] initWithContentsOfURL:fileURL error:NULL];

theAudio.volume = 1.0;

theAudio.delegate = self;

[theAudio prepareToPlay];

[theAudio play];

}

Answer 1

这是解决方案;

我在头文件中设置了AVAudioPlayer ..

@property（nonatomic，retain）AVAudioPlayer * theAudio;

我猜'保留'解决了我的问题。因为在我发送“播放”之后，它发送“释放”来平衡分配。取消分配AVAudioPlayer后，它将停止播放音频。

Answer 2

我遇到了与Xcode 4.5相同的问题。使AVAudioPlayer成为一个强类型属性使它发挥作用。

因此需要在@interface中添加以下代码：

@property (nonatomic, strong) AVAudioPlayer *theAudio;

@implementation将成为：

- (IBAction) playSelectedAlarm:(id)sender {

    UIButton *button = (UIButton *)sender;

    int bTag = button.tag;

    NSString *fileName = [NSString stringWithFormat:@"%d23333", bTag];

    NSLog(@"%@", fileName);

    NSString *path = [[NSBundle mainBundle] pathForResource:fileName ofType:@"wav"];

    NSURL *fileURL = [[NSURL alloc] initFileURLWithPath: path];

    self.theAudio=[[AVAudioPlayer alloc] initWithContentsOfURL:fileURL error:NULL];

    self.theAudio.volume = 1.0;

    self.theAudio.delegate = self;

    [self.theAudio prepareToPlay];

    [self.theAudio play];

}

用AVFoundation播放wav声音文件

2 个答案: