如何让CvVideoCamera不自动旋转？

Question

我的CvVideoCamera自动旋转，我不想这样做。 This has been raised on the bugtracker，但暂时没有任何活动。

Answer 1

子类CvVideoCamera，只需删除旋转代码即可。我希望我的方向始终是肖像，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

Answer 2

为了使其有效，我不得不添加：

@protocol CvVideoCameraDelegateMod <CvVideoCameraDelegate>
@end

到上面描述的MyCvVideoCamera.h

和

@synthesize customPreviewLayer = _customPreviewLayer;

到MyCvVideoCamera.m

Answer 3

快速修复 在初始化CVVideoCamera之前添加这些行

NSNumber * value = [NSNumber numberWithInt：UIInterfaceOrientationPortrait]; [[UIDevice currentDevice] setValue：value forKey：@＆＃34; orientation＆＃34;];

self.videoCamera = [[CvVideoCamera alloc] initWithParentView：self.previewImage]; self.videoCamera.delegate = self;