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我正在使用AVFoundation类在我的应用程序中实现自定义相机.我只捕捉静止图像,而不是视频.我有一切工作,但我被一些东西困扰.我会在捕获静止图像时考虑设备方向,并适当地设置视频连接的videoOrientation.代码段:

    // set the videoOrientation based on the device orientation to
    // ensure the pic is right side up for all orientations
    AVCaptureVideoOrientation videoOrientation;
    switch ([UIDevice currentDevice].orientation) {
        case UIDeviceOrientationLandscapeLeft:
            // Not clear why but the landscape orientations are reversed
            // if I use AVCaptureVideoOrientationLandscapeLeft here the pic ends up upside down
            videoOrientation = AVCaptureVideoOrientationLandscapeRight;
            break;
        case UIDeviceOrientationLandscapeRight:
            // Not clear why but the landscape orientations are reversed
            // if I use AVCaptureVideoOrientationLandscapeRight here the pic ends up upside down …