AVCAM iOS 6中的景观

Question

我是iOS的新手，尝试使用AVCAM创建自定义相机。我在获得景观方向的预览很难 - 它使视图顺时针旋转90度并在半屏幕上显示。

我收到此消息 -

警告： - [setorientation：]不推荐使用。

请使用avcaptureconnection的-setVideoInientation：

avcaptureconnection已经设置了方向，所以我不知道我应该做什么。

我知道这个问题已被iOS的先前版本（4,5）提出了很多次，但是这些技术/代码中的不适合我（iOS 6）。

原始代码（没有对Apple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。我通过做两件事解决了这个问题

1. 获得正确的方向
   更换

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

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

2. 强制在初始化期间更新视频取向，以通过触发视频输出以捕获视频输出 - (void)deviceOrientationDidChange在AVCaptureManager.m

   中手动

   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;
   }
   

Answer 2

所以，这是一个解决方法，但是我相信必须有比这更好的解决方案。我从这个问题中获得了代码的一部分：

iPhone应用程序 - 在景观模式上显示Avfoundation视频

，但必须针对每个方向调整框架才能使其在ios6上工作（并且仍然显示警告）：

---

- （void）willanimatimatotation tointerfaceorientation：（uiinterfaceorientation）到interfaceorientation 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];

}