Question

我正在使用Ios6中的iPad App，当我们点击右边的按钮时，我正在执行如下操作：

-(IBAction)camerabuttonAction:(id)sender
{
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    picker.delegate = self;

   self.popoverController = [[UIPopoverController alloc] initWithContentViewController:picker];
   [self.popoverController presentPopoverFromRect:CGRectMake(50, -250, 500, 300) inView:appDelegate.splitview.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
}

我的问题是，当我在Land scape模式时，如果我点击按钮。每次使用后，相机将以纵向模式显示（图像以反向模式显示）。但是，如果我摇动iPad，它会在LandScape中显示，即正确的方向。

见下图

当我处于Land scape模式时，如果我点击按钮，相机会显示如下图像：

enter image description here

如果我摇动iPad，那么相机会显示如下图像：

enter image description here

我已经尝试了很多并用Google搜索，但我找不到任何解决方案。这是在浪费我的时间，所以如果有人参与其中，请指导我并发布示例代码。

Answer 1

我在我的项目中遇到了同样的问题，我已经尝试了以下内容并为我工作

我的代码：

- (UIImage *)scaleAndRotateImage:(UIImage *)image {
    int kMaxResolution = 640; // Or whatever

    CGImageRef imgRef = image.CGImage;

    CGFloat width = CGImageGetWidth(imgRef);
    CGFloat height = CGImageGetHeight(imgRef);


    CGAffineTransform transform = CGAffineTransformIdentity;
    CGRect bounds = CGRectMake(0, 0, width, height);
    if (width > kMaxResolution || height > kMaxResolution) {
        CGFloat ratio = width/height;
        if (ratio > 1) {
            bounds.size.width = kMaxResolution;
            bounds.size.height = roundf(bounds.size.width / ratio);
        }
        else {
            bounds.size.height = kMaxResolution;
            bounds.size.width = roundf(bounds.size.height * ratio);
        }
    }

    CGFloat scaleRatio = bounds.size.width / width;
    CGSize imageSize = CGSizeMake(CGImageGetWidth(imgRef), CGImageGetHeight(imgRef));
    CGFloat boundHeight;
    UIImageOrientation orient = image.imageOrientation;
    switch(orient) {

        case UIImageOrientationUp: //EXIF = 1
            transform = CGAffineTransformIdentity;
            break;

        case UIImageOrientationUpMirrored: //EXIF = 2
            transform = CGAffineTransformMakeTranslation(imageSize.width, 0.0);
            transform = CGAffineTransformScale(transform, -1.0, 1.0);
            break;

        case UIImageOrientationDown: //EXIF = 3
            transform = CGAffineTransformMakeTranslation(imageSize.width, imageSize.height);
            transform = CGAffineTransformRotate(transform, M_PI);
            break;

        case UIImageOrientationDownMirrored: //EXIF = 4
            transform = CGAffineTransformMakeTranslation(0.0, imageSize.height);
            transform = CGAffineTransformScale(transform, 1.0, -1.0);
            break;

        case UIImageOrientationLeftMirrored: //EXIF = 5
            boundHeight = bounds.size.height;
            bounds.size.height = bounds.size.width;
            bounds.size.width = boundHeight;
            transform = CGAffineTransformMakeTranslation(imageSize.height, imageSize.width);
            transform = CGAffineTransformScale(transform, -1.0, 1.0);
            transform = CGAffineTransformRotate(transform, 3.0 * M_PI / 2.0);
            break;

        case UIImageOrientationLeft: //EXIF = 6
            boundHeight = bounds.size.height;
            bounds.size.height = bounds.size.width;
            bounds.size.width = boundHeight;
            transform = CGAffineTransformMakeTranslation(0.0, imageSize.width);
            transform = CGAffineTransformRotate(transform, 3.0 * M_PI / 2.0);
            break;

        case UIImageOrientationRightMirrored: //EXIF = 7
            boundHeight = bounds.size.height;
            bounds.size.height = bounds.size.width;
            bounds.size.width = boundHeight;
            transform = CGAffineTransformMakeScale(-1.0, 1.0);
            transform = CGAffineTransformRotate(transform, M_PI / 2.0);
            break;

        case UIImageOrientationRight: //EXIF = 8
            boundHeight = bounds.size.height;
            bounds.size.height = bounds.size.width;
            bounds.size.width = boundHeight;
            transform = CGAffineTransformMakeTranslation(imageSize.height, 0.0);
            transform = CGAffineTransformRotate(transform, M_PI / 2.0);
            break;

        default:
            [NSException raise:NSInternalInconsistencyException format:@"Invalid image orientation"];

    }

    UIGraphicsBeginImageContext(bounds.size);

    CGContextRef context = UIGraphicsGetCurrentContext();

    if (orient == UIImageOrientationRight || orient == UIImageOrientationLeft) {
        CGContextScaleCTM(context, -scaleRatio, scaleRatio);
        CGContextTranslateCTM(context, -height, 0);
    }
    else {
        CGContextScaleCTM(context, scaleRatio, -scaleRatio);
        CGContextTranslateCTM(context, 0, -height);
    }

    CGContextConcatCTM(context, transform);

    CGContextDrawImage(UIGraphicsGetCurrentContext(), CGRectMake(0, 0, width, height), imgRef);
    UIImage *imageCopy = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    return imageCopy;
}

Answer 2

您可以尝试将变换赋予imagePickerController

imagePickerController.view.transform = CGAffineTransformMakeRotation(-M_PI/2);

Answer 3

我在Google搜索中研究了您的问题并得到了一些结果或可能性如下： -

结果1

一些答案说它是一个iOS 6的bug，所以你无法修复它像下面的命令： -

iPad camera popover preview wrong rotation and scale

结果2

我认为我们无法控制相机的方向。相机方向属性是内置的，随着设备的方向而变化。

iPad camera orientation portrait mode?

结果3

您可以管理中心的缩放实时iPhone相机视图，物理移动拾取器框架。通过Bellow代码： -

[picker.view setFrame:CGRectMake(xOffset,yOffset,picker.view.frame.size.width,picker.view.frame.size.height)];

希望你得到实际的解决方案。关于这个错误或问题

Answer 4

我会在这里尝试一下，因为我自己没有这样做......

您是否尝试过创建UIImagePickerController的子类并从ViewController（超类）实现interfaceOrientation的方法？

Answer 5

请试试这个

[popController presentPopoverFromRect:CGRectMake(1024, 
  self.view.bounds.origin.y + (self.view.bounds.size.height / 2), 1, 1) 
inView:self.view 
permittedArrowDirections:UIPopoverArrowDirectionRight 
animated:YES];

Answer 6

我有一个ipad应用程序只有lanscape模式，我吓坏了，因为我读了所有这些帖子，但我用这个非常简单的代码拍照，它适用于我唯一的lanscape应用程序。重要的是我没有从图书馆中选择一张图片，我只是拍照并用它将它放在另一张图片上，它对我来说非常适合。

if ([UIImagePickerController isSourceTypeAvailable:
         UIImagePickerControllerSourceTypeCamera])
    {

        UIImagePickerController *imagePicker =
        [[UIImagePickerController alloc] init];
        imagePicker.delegate = self;
        imagePicker.sourceType =
        UIImagePickerControllerSourceTypeCamera;
        imagePicker.mediaTypes = [NSArray arrayWithObjects:
                                  (NSString *) kUTTypeImage,
                                  nil];
        imagePicker.allowsEditing = NO;
        [self presentViewController:imagePicker
                                animated:YES completion:nil];
       // [imagePicker release];
        newMedia = YES;
    }

-(void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    [self.popoverController dismissPopoverAnimated:true];
  //  [popoverController release];

    NSString *mediaType = [info
                           objectForKey:UIImagePickerControllerMediaType];
    [self dismissViewControllerAnimated:YES completion:nil];
    if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
        UIImage *image = [info
                          objectForKey:UIImagePickerControllerOriginalImage];

        imageView.image = image;
        if (newMedia)
            UIImageWriteToSavedPhotosAlbum(image,
                                           self,
                                           @selector(image:finishedSavingWithError:contextInfo:),
                                           nil);
    }
    else if ([mediaType isEqualToString:(NSString *)kUTTypeMovie])
    {
        // Code here to support video if enabled
    }
}

无法以横向模式从相机以适当的格式显示图像

6 个答案: