Ios AVCam到情节提要-摄像头未显示

我从Apple下载了AVCam示例，并尝试将xib文件迁移到情节提要

问题是“newCaptureVideoPreviewLayer”没有在视图中显示视频。。。 视图引用了“videoPreviewView”这是视频应该出现的视图

这是AVCam示例中的代码，我只是粘贴了代码并删除了不必要的内容：

- (void)viewDidLoad
{
    if ([self captureManager] == nil) {
    AVCamCaptureManager *manager = [[AVCamCaptureManager alloc] init];
    [self setCaptureManager:manager];
    [manager release];

    [[self captureManager] setDelegate:self];

    if ([[self captureManager] setupSession]) {
        // Create video preview layer and add it to the UI
        AVCaptureVideoPreviewLayer *newCaptureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:[[self captureManager] session]];
        UIView *view = [self videoPreviewView];
        CALayer *viewLayer = [view layer];
        [viewLayer setMasksToBounds:YES];

        CGRect bounds = [view bounds];
        [newCaptureVideoPreviewLayer setFrame:bounds];

        [newCaptureVideoPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];

        [viewLayer insertSublayer:newCaptureVideoPreviewLayer below:[[viewLayer sublayers] objectAtIndex:0]];

        [self setCaptureVideoPreviewLayer:newCaptureVideoPreviewLayer];
        [newCaptureVideoPreviewLayer release];

        // Start the session. This is done asychronously since -startRunning doesn't return until the session is running.
        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
            [[[self captureManager] session] startRunning];
        });
    }
}

[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}

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有人有建议吗？

您可能需要确保您的camerapreview视图是故事板中的顶部子视图。最后添加它或使用BringSubviewToFront api

如果按“拍照”，我猜相机正在将图片保存到您的照片相机卷中？如果不是，则可能是init代码的问题。我不得不更改ios 6的iMirrored弃用代码