Question

我一直在使用来自infragistics的iOS 7扫描条码（Objective-C），效果很好。我正在尝试在完成成功扫描时添加一声蜂鸣声，但一直收到错误。对于比我更了解的人，我确信这是一个简单的解决方法。

-(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 -

-Could not play beep file.
-The operation couldn’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，但它在主束中并且目标成员资格框被勾选。也许我只是想以错误的方式解决这个问题！

Answer 1

而不是：

    NSURL *beepURL = [NSURL URLWithString:beepFilePath];

请改为尝试：

    NSURL *beepURL = [NSURL fileURLWithPath:beepFilePath];

Answer 2

使用[NSURL URLWithString:beepFilePath];时，它只获取文件夹路径的字符串，如Users/***/folder/etc。

因此请使用[NSURL fileURLWithPath:beepFilePath];此代码作为完整路径，例如file:///Users/***/folder/etc。

工作代码：

NSURL *beepURL = [NSURL fileURLWithPath:beepFilePath];

可选方法：

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

iOS为条形码扫描器增加了哔哔声

2 个答案: