小编use*_*444的帖子

我期待用滑块选项调暗手电筒的LED.我知道Apple支持iOS 6但是,我不确定要使用什么代码.这是我目前在.m文件中的代码.

-(IBAction)torchOn:(id)sender;
{
    onButton.hidden = YES;
    offButton.hidden = NO;

    onView.hidden = NO;
    offView.hidden = YES;


    AVCaptureDevice *flashLight = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
    if([flashLight isTorchAvailable] && [flashLight isTorchModeSupported:AVCaptureTorchModeOn])
    {
        BOOL success = [flashLight lockForConfiguration:nil];
        if(success)
        {
            [flashLight setTorchMode:AVCaptureTorchModeOn];
            [flashLight unlockForConfiguration];
        }
    }
}


-(IBAction)torchOff:(id)sender;
{
    onButton.hidden = NO;
    offButton.hidden = YES;

    onView.hidden = YES;
    offView.hidden = NO;

    AVCaptureDevice *flashLight = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
    if([flashLight isTorchAvailable] && [flashLight isTorchModeSupported:AVCaptureTorchModeOn])
    {
        BOOL success = [flashLight lockForConfiguration:nil];
        if(success)
        {
            [flashLight setTorchMode:AVCaptureTorchModeOff];
            [flashLight unlockForConfiguration];
        }
    }
}