UIImagePickerController 问题 - iPhone

Question

我使用UIImagePickerController 以portrait 和landscape 模式从相机拍摄照片，我的应用程序中允许的方向是portrait & landscape。在纵向模式下，我的相机覆盖工作正常。但是在横向模式下，在拍摄照片后默认相机覆盖标签“预览”并使用和重拍操作按钮，并且从相机拍摄的实时图像也以纵向模式出现。我是否需要使用自动调整大小。如何在横向模式下设置这个完整的相机覆盖视图（第二张截图）？

这是我要提交的代码UIImagePickerController：

UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera] == NO){
    NSLog(@"Camera not available");
    return;
}

imagePickerController.delegate = self;
imagePickerController.allowsEditing = YES;
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentViewController:imagePickerController animated:YES completion:nil];

对于方向，这是我使用图像选择器控制器的视图控制器类的代码..

- (BOOL)shouldAutorotate {
    return YES;
}

- (NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskPortrait;  
}

这是我的相机初始视图，当我的设备处于横向模式时：

从相机拍摄照片后的第二次查看：

我的视图控制器，我在其中显示图像选择器仅处于纵向模式，但从相机拍摄照片应该适用于使用图像选择器的纵向和横向。我希望在横向模式下，我的相机叠加层（附加的第二个屏幕截图）应该在视图底部显示他们的预览标签栏。是否可以使用默认相机叠加层或我需要创建自定义相机叠加层视图？请帮我修复它。这是我的应用程序的主要问题。

谢谢。

Answer 1

不，你不能用“UIImagePickerController”kindly take a look at documentation来做到这一点。

重要提示：UIImagePickerController 类仅支持纵向模式。此类旨在按原样使用，不支持子类化。此类的视图层次结构是私有的，不得修改，但有一个例外。您可以将自定义视图分配给 cameraOverlayView 属性，并使用该视图来显示附加信息或管理相机界面和代码之间的交互。

但您可以使用Assets Library Framework 访问图像列表并创建自己的图像选择器。

你也可以试试 git：ELCImagePickerController。

快乐编码。

Answer 2

您可以尝试下面的代码来修复您的 Uiimage，您可能需要稍微调整一下才能获得自己的正确方向，

- (void)imagePickerController:(UIImagePickerController *)picker
    didFinishPickingMediaWithInfo:(NSDictionary *)info
 {
       UIImage *originalImage = (UIImage*) [info  objectForKey:UIImagePickerControllerOriginalImage];

    //--> get the fixed orientation image
  UIImage *fixedImage = [self fixOrientation:originalImage];


 }


- (UIImage *)fixOrientation:(UIImage*)takenImage {
// --> check the correct orientation if yes return the same.
if (takenImage.imageOrientation == UIImageOrientationUp) return takenImage;

// --> if taken image orientation is wrong adjust the image as per the correct orientation.
CGAffineTransform transform = CGAffineTransformIdentity;

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

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

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

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

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

//--> draw the calculated image above
CGContextRef ctx = CGBitmapContextCreate(NULL, takenImage.size.width, takenImage.size.height,
                                         CGImageGetBitsPerComponent(takenImage.CGImage), 0,
                                         CGImageGetColorSpace(takenImage.CGImage),
                                         CGImageGetBitmapInfo(takenImage.CGImage));
CGContextConcatCTM(ctx, transform);
switch (takenImage.imageOrientation) {
        case UIImageOrientationLeft:
        case UIImageOrientationLeftMirrored:
        case UIImageOrientationRight:
        case UIImageOrientationRightMirrored:

        CGContextDrawImage(ctx, CGRectMake(0,0,takenImage.size.height,takenImage.size.width), takenImage.CGImage);
        break;

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

// return the new fixed image to display
CGImageRef cgimg = CGBitmapContextCreateImage(ctx);
UIImage *img = [UIImage imageWithCGImage:cgimg];
CGContextRelease(ctx);
CGImageRelease(cgimg);
return img;
}

您可以调整代码以获得所需的方向。