ios - UIImageView 没有在 iPhone 中以正确的方向呈现图像

Question

我尝试了很多解决方案，但还没有奏效

这是我正在做的:

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
    {
        UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
        imagePicker.delegate = self;
        imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
        imagePicker.modalPresentationStyle = UIModalPresentationCurrentContext;
        //imagePicker.allowsEditing = YES;

        NSOperatingSystemVersion ios8_0_0 = (NSOperatingSystemVersion){8, 0, 0};

          //This was suggested in answer of some question of stackoverflow
        if ([[NSProcessInfo processInfo] isOperatingSystemAtLeastVersion:ios8_0_0])
        {
            if([[UIDevice currentDevice]orientation] == UIDeviceOrientationFaceUp)
            {
                if([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationLandscapeLeft)
                {
                    [[UIDevice currentDevice]setValue:[NSNumber numberWithInteger:UIDeviceOrientationLandscapeRight] forKey:@"orientation"];
                }
                else
                {
                    [[UIDevice currentDevice]setValue:[NSNumber numberWithInteger:UIDeviceOrientationLandscapeLeft] forKey:@"orientation"];
                }
            }
        }

        self.imagePickerController = imagePicker;
        [self presentViewController:self.imagePickerController animated:YES completion:nil];

}

当上述方法不起作用时，我在保存图片时尝试了一些其他方法

 NSData *imgPngData = UIImagePNGRepresentation([info objectForKey:UIImagePickerControllerOriginalImage]);
    UIImage *image = [UIImage imageWithData:imgPngData];
     imgPngData = UIImagePNGRepresentation(image);
        [_profilePicture setImage:[UIImage imageWithCGImage:[image CGImage] scale:1.0 orientation:UIImageOrientationUp]];

但对行为没有影响。这就是我拍摄这张照片时发生的事情。

这就是出现在我的 imageView 上的内容

请提出一些建议。提前感谢大家。

Answer 1

我通过集成以下代码解决了同样的问题。引用 link对于代码

- (UIImage *)fixOrientation {

    // No-op if the orientation is already correct
    if (self.imageOrientation == UIImageOrientationUp) return self;

    // We need to calculate the proper transformation to make the image upright.
    // We do it in 2 steps: Rotate if Left/Right/Down, and then flip if Mirrored.
    CGAffineTransform transform = CGAffineTransformIdentity;

    switch (self.imageOrientation) {
        case UIImageOrientationDown:
        case UIImageOrientationDownMirrored:
            transform = CGAffineTransformTranslate(transform, self.size.width, self.size.height);
            transform = CGAffineTransformRotate(transform, M_PI);
            break;

        case UIImageOrientationLeft:
        case UIImageOrientationLeftMirrored:
            transform = CGAffineTransformTranslate(transform, self.size.width, 0);
            transform = CGAffineTransformRotate(transform, M_PI_2);
            break;

        case UIImageOrientationRight:
        case UIImageOrientationRightMirrored:
            transform = CGAffineTransformTranslate(transform, 0, self.size.height);
            transform = CGAffineTransformRotate(transform, -M_PI_2);
            break;
        case UIImageOrientationUp:
        case UIImageOrientationUpMirrored:
            break;
    }

    switch (self.imageOrientation) {
        case UIImageOrientationUpMirrored:
        case UIImageOrientationDownMirrored:
            transform = CGAffineTransformTranslate(transform, self.size.width, 0);
            transform = CGAffineTransformScale(transform, -1, 1);
            break;

        case UIImageOrientationLeftMirrored:
        case UIImageOrientationRightMirrored:
            transform = CGAffineTransformTranslate(transform, self.size.height, 0);
            transform = CGAffineTransformScale(transform, -1, 1);
            break;
        case UIImageOrientationUp:
        case UIImageOrientationDown:
        case UIImageOrientationLeft:
        case UIImageOrientationRight:
            break;
    }

    // Now we draw the underlying CGImage into a new context, applying the transform
    // calculated above.
    CGContextRef ctx = CGBitmapContextCreate(NULL, self.size.width, self.size.height,
                                             CGImageGetBitsPerComponent(self.CGImage), 0,
                                             CGImageGetColorSpace(self.CGImage),
                                             CGImageGetBitmapInfo(self.CGImage));
//    CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceGray();
//    CGContextRef ctx = CGBitmapContextCreate(NULL, self.size.width, self.size.height,
//                                            8, self.size.width,
//                                             colorspace,
//                                             kCGImageAlphaNone);
    CGContextConcatCTM(ctx, transform);
    switch (self.imageOrientation) {
        case UIImageOrientationLeft:
        case UIImageOrientationLeftMirrored:
        case UIImageOrientationRight:
        case UIImageOrientationRightMirrored:
            // Grr...
            CGContextDrawImage(ctx, CGRectMake(0,0,self.size.height,self.size.width), self.CGImage);
            break;

        default:
            CGContextDrawImage(ctx, CGRectMake(0,0,self.size.width,self.size.height), self.CGImage);
            break;
    }

    // And now we just create a new UIImage from the drawing context
    CGImageRef cgimg = CGBitmapContextCreateImage(ctx);
    UIImage *img = [UIImage imageWithCGImage:cgimg];
    CGContextRelease(ctx);
    CGImageRelease(cgimg);
    return img;
}