iOS - Uiimageview - How to Handle Uiimage Image Orientation

iOS - UIImageView - how to handle UIImage image orientation

If I understand, what you want to do is disregard the orientation of the UIImage? If so then you could do this:

UIImage *originalImage = [... whatever ...];

UIImage *imageToDisplay =
     [UIImage imageWithCGImage:[originalImage CGImage]
              scale:[originalImage scale]
              orientation: UIImageOrientationUp];

So you're creating a new UIImage with the same pixel data as the original (referenced via its CGImage property) but you're specifying an orientation that doesn't rotate the data.

iOS UIImage: set image orientation without rotating the image itself

- (UIImage *)removeRotationForImage:(UIImage*)image {
   if (image.imageOrientation == UIImageOrientationUp) return image;

   UIGraphicsBeginImageContextWithOptions(image.size, NO, image.scale);
   [image drawInRect:(CGRect){0, 0, image.size}];
   UIImage *normalizedImage =  UIGraphicsGetImageFromCurrentImageContext();
   UIGraphicsEndImageContext();
   return normalizedImage;
}

IOS :Get UIImage Orientation inside a UIImageview with exif data?

You can use myImage.imageOrientation, which will give you the UIImageOrientation.

OR

If you used UIImagePickerViewController then use its delegate method

"imagePickerController:didFinishPickingMediaWithInfo:"

In This method you can also access the info dictionary

NSlog(@"%d", [info objectForKey:@"Orientation"]);

Save UIImage, Load it in Wrong Orientation

I have faced similar problem and here is how I solved it.

While we save image we need to save its orientation information along with the image ...

NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
[userDefaults setInteger:[myImage imageOrientation] forKey:@"kImageOrientation"];
[imageOrientation release];

And we load image we need to read its orientation information and apply it to the image…

UIImage *tempImage = [[UIImage alloc] initWithContentsOfFile:fullPath];
UIImage *orientedImage= [[UIImage alloc] initWithCGImage: tempImage.CGImage scale:1.0 orientation:imageOrientation];
[tempImage release];

orientedImage is what we need.

Thanks,

Best way to manage image orientation?

I found my error!!

I was saving the image using UIImagePNGRepresentation(image); so the image lose the orientation and when I wanted to use it, the image already was a default orientation that isn´t the correct one.

The solution is to use UIImageJPEGRepresentation(image, 1.0); instead of UIImagePNGRepresentation(image); and for automatically the image save with the correct orientation.

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