关于objective C:iOS为条码扫描器添加哔声

iOS add beep to barcode scanner

我一直在使用来自 infragistics 的带有 iOS 7 (Objective-C) 的扫描条码,它运行良好。我正在尝试在成功完成扫描时添加哔声,但不断收到错误消息。我相信对于比我了解更多的人来说,这很容易解决。

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-(void)loadBeepSound{
    // Get the path to the beep.mp3 file and convert it to a NSURL object.
    NSString *beepFilePath = [NSString stringWithFormat:@"%@/beep.mp3", [[NSBundle mainBundle] resourcePath]];
    NSURL *beepURL = [NSURL URLWithString:beepFilePath];

    NSError *error;

    // Initialize the audio player object using the NSURL object previously set.
    _audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:beepURL error:&error];
    if (error) {
        // If the audio player cannot be initialized then log a message.
        NSLog(@"Could not play beep file.");
        NSLog(@"%@", [error localizedDescription]);
        NSLog(@"beepFilePath %@", beepFilePath);
    }
    else{
        // If the audio player was successfully initialized then load it in memory.
        [_audioPlayer prepareToPlay];
    }
}

错误记录为 -

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-Could not play beep file.
-The operation couldna€?t be completed. (OSStatus error -10875.)
-beepFilePath /private/var/mobile/Containers/Bundle/Application/22BB6164-82F8-46E5-B4B6-  4C91BCA2B7E9/ReThink Edu App.app/beep.mp3

因此加载哔声似乎是一个问题,但它位于主捆绑包中,并且目标成员资格框已打勾。也许我只是想以错误的方式解决这个问题!


而不是这个:

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    NSURL *beepURL = [NSURL URLWithString:beepFilePath];

试试这个:

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    NSURL *beepURL = [NSURL fileURLWithPath:beepFilePath];


当您使用 [NSURL URLWithString:beepFilePath]; 时,它只会获取文件夹路径的字符串,例如 Users/***/folder/etc

所以使用 [NSURL fileURLWithPath:beepFilePath]; 这段代码将完整路径像 file:///Users/***/folder/etc.

工作代码:

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NSURL *beepURL = [NSURL fileURLWithPath:beepFilePath];

可选方法:

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NSURL *beepURL = [NSURL URLWithString:[NSString stringWithFormat:@"file:///%@", beepFilePath]];