AvCam iOS 6的景观

Question

我是iOS的新手，尝试用AvCam创建定制相机。我有困难获得景观方向预览-它旋转90度顺时针，并显示在半屏幕上。

我收到这条消息--

警告：- setOrientation:是不推荐的。

请使用AVCaptureConnection的-setVideoOrientation：

AVCaptureConnection已经设定了方向，所以我不知道我还能做什么。

我知道在iOS的早期版本(4,5)中，这个问题被问了很多次，但是这些技术/代码对我没有用(iOS 6)。

原始代码(没有对Apple做任何更改)

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块：

-(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。我做了两件事解决了这个问题

1. 找到正确的方向 Replaceif (newCaptureVideoPreviewLayer isOrientationSupported) { newCaptureVideoPreviewLayer isOrientationSupported }Withif (newCaptureVideoPreviewLayer.connection isVideoOrientationSupported) { [newCaptureVideoPreviewLayer.connection setVideoOrientation:UIDevice currentDevice.orientation]；}
2. 通过在- (void)deviceOrientationDidChange中手动触发AVCaptureManager.m，强制在初始化过程中更新视频方向以捕获景观模式下的视频输出。 我把它加到：

• ( BOOL ) setupSession {BOOL成功=否；performSelector:@selector(deviceOrientationDidChange)；AVCamRecorder *AVCamRecorder *newRecorder = [AVCamRecorder alloc initWithSession:self session outputFileURL:self.lastOutputfileURL]；newRecorder setDelegate: self；self AVCamRecorder.返回成功；}

Answer 2

因此，这里有一个解决办法，但我相信肯定会有比这更好的解决办法。我从这个问题中得到了一部分代码：

iPhone App - Show AVFoundation video on landscape mode

但是，为了使其在iOS6上工作(它仍然显示警告)，必须为每个方向调整框架：

-(void)willAnimateRotationToInterfaceOrientation：(UIInterfaceOrientation)toInterfaceOrientation持续时间：(NSTimeInterval)持续时间{

[CATransaction begin];
if (toInterfaceOrientation==UIInterfaceOrientationLandscapeLeft){
    captureVideoPreviewLayer.orientation = UIInterfaceOrientationLandscapeLeft;
    captureVideoPreviewLayer.frame = CGRectMake(0, 0, 480, 320);

} else if (toInterfaceOrientation==UIInterfaceOrientationPortrait){
    captureVideoPreviewLayer.orientation = UIInterfaceOrientationPortrait;
    captureVideoPreviewLayer.frame = CGRectMake(0, 0, 320, 480);

} else if (toInterfaceOrientation==UIInterfaceOrientationLandscapeRight){
    captureVideoPreviewLayer.orientation = UIInterfaceOrientationLandscapeRight;
    captureVideoPreviewLayer.frame = CGRectMake(0, 0, 480, 320);

}
[CATransaction commit];
[super willAnimateRotationToInterfaceOrientation:toInterfaceOrientation duration:duration];

}