ios - 如何让 CvVideoCamera 不自动旋转？

Question

我的 CvVideoCamera 会自动旋转，但我不希望它这样做。 This has been raised on the bugtracker , 但是有一段时间没有事件了。

Answer 1

子类CvVideoCamera，只删除旋转代码。我希望我的方向始终是纵向的，所以这很简单:

MyCvVideoCamera.h

#import <opencv2/highgui/cap_ios.h>

@interface MyCvVideoCamera : CvVideoCamera

- (void)updateOrientation;
- (void)layoutPreviewLayer;

@property (nonatomic, retain) CALayer *customPreviewLayer;

@end

MyCvVideoCamera.m

#import "MyCvVideoCamera.h"

@implementation MyCvVideoCamera

- (void)updateOrientation;
{
    // nop
}
- (void)layoutPreviewLayer;
{
    if (self.parentView != nil) {
        CALayer* layer = self.customPreviewLayer;
        CGRect bounds = self.customPreviewLayer.bounds;
        layer.position = CGPointMake(self.parentView.frame.size.width/2., self.parentView.frame.size.height/2.);
        layer.bounds = bounds;
    }
}
@end