如何将AVCaptureDevice静音？

Question

我的cams是AVCaptureDevice，我确定闪光灯是关着的，但现在我需要把相机的噪音关了，有没有办法做到这一点？

NSArray* cams = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
    AVCaptureDevice* device = nil;
    if(isBackCamera)
    {
        device = [possibleCameras objectAtIndex:0];
    }
    else
    {
        device = [possibleCameras objectAtIndex:1];
    }

    device.flashMode = AVCaptureFlashModeOff;

Answer 1

我想苹果不会允许你这么做的

Answer 2

我能够禁用/静音相机快门声音，同时以编程方式使用以下代码截图。已确认在iPhone 5上运行iOS8.3，并被应用商店接受。

MPVolumeView* volumeView = [[MPVolumeView alloc] init];
//find the volumeSlider
UISlider* volumeViewSlider = nil;
for (UIView *view in [volumeView subviews]){
    if ([view.class.description isEqualToString:@"MPVolumeSlider"]){
        volumeViewSlider = (UISlider*)view;
        break;
    }
}

[volumeViewSlider setValue:0.0f animated:YES];
[volumeViewSlider sendActionsForControlEvents:UIControlEventTouchUpInside];