iphone - AvCam iOS 6 中的风景

Question

我是 iOS 新手，正在尝试使用 AvCam 创建自定义相机。我在获取横向预览时遇到问题 - 它会将 View 顺时针旋转 90 度并在半个屏幕上显示。

我收到此消息 -

WARNING: -[ setOrientation:] is deprecated.

请使用 AVCaptureConnection 的 -setVideoOrientation:

AVCaptureConnection 已经设置了方向，所以我不知道我还应该做什么。

我知道这个问题在以前的 iOS 版本(4,5)中被问过很多次，但这些技术/代码都不适合我(iOS 6)。

原始代码(Apple 未进行任何更改)

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];

        if ([newCaptureVideoPreviewLayer isOrientationSupported]) {
            [newCaptureVideoPreviewLayer setOrientation:AVCaptureVideoOrientationPortrait];
        }



        [newCaptureVideoPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];

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

        [self setCaptureVideoPreviewLayer:newCaptureVideoPreviewLayer];

AVCaptureConnection block :

-(void)startRecordingWithOrientation:(AVCaptureVideoOrientation)videoOrientation; {
AVCaptureConnection *videoConnection = [AVCamUtilities connectionWithMediaType:AVMediaTypeVideo fromConnections:[[self movieFileOutput] connections]];
if ([videoConnection isVideoOrientationSupported])
    [videoConnection setVideoOrientation:videoOrientation];

[[self movieFileOutput] startRecordingToOutputFileURL:[self outputFileURL] recordingDelegate:self];

}

Answer 1

上次我也偶然发现了这个问题。我通过做两件事解决了这个问题

1. 获得正确的方向
   替换

   if ([newCaptureVideoPreviewLayer isOrientationSupported]) {
       [newCaptureVideoPreviewLayer setOrientation:AVCaptureVideoOrientationPortrait];
   }  
   

   与

   if ([newCaptureVideoPreviewLayer.connection isVideoOrientationSupported]) {  
       [newCaptureVideoPreviewLayer.connection setVideoOrientation:[UIDevice currentDevice].orientation];
   }
   

2. 在初始化期间强制更新视频方向，以通过触发捕获横向模式下的视频输出- (void)deviceOrientationDidChange 在 AVCaptureManager.m 中手动进行

   我将其添加到:

   - (BOOL) setupSession
   {
       BOOL success = NO;
   
       ...
   
       AVCamRecorder *newRecorder = [[AVCamRecorder alloc] initWithSession:[self session] outputFileURL:self.lastOutputfileURL];
       [newRecorder setDelegate:self];
   
       [self performSelector:@selector(deviceOrientationDidChange)];
   
       ...
   
       return success;
   }