is it possible that the -(MWPhoto *) photoWithImage
method doesn't read the orientation property of the UIImage? i would try rotating the image by drawing it into a rotated image context and then extracting the rotated image from the context. check out this thread:
Creating a UIImage from a rotated UIImageView
how to add rotate photo functionality to MWPhotoBrowser?
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31-08-2022 - |
Question
Below is my attempt. I added a rightBarButtonItem to the navigation bar. Then connected it with the method below. What am I doing wrong? When I click the button, the method is called, because I see the log. Nothing visible happens when it is called. If I click the button repeatedly, the image flickers however.
- (void)rotatedImage
{
NSLog(@"rotatedImage");
id <MWPhoto> assetPhoto = [self photoAtIndex:_currentPageIndex];
UIImageOrientation imageOrientation = assetPhoto.underlyingImage.imageOrientation;
UIImageOrientation orientationToBe;
if (imageOrientation == UIImageOrientationLeft) orientationToBe = UIImageOrientationDown;
else if (imageOrientation == UIImageOrientationDown) orientationToBe = UIImageOrientationRight;
else if (imageOrientation == UIImageOrientationRight) orientationToBe = UIImageOrientationUp;
else orientationToBe = UIImageOrientationLeft;
UIImage *rotatedImage = [UIImage imageWithCGImage:[assetPhoto.underlyingImage CGImage] scale: 1 orientation:orientationToBe];
MWPhoto *r = [MWPhoto photoWithImage:rotatedImage];
[_photos replaceObjectAtIndex:_currentPageIndex withObject:r];
[self reloadData];
}
Solution
OTHER TIPS
I add the photo rotate functionality to MwphotoBrawse.Its rotate succesfully.May be help to any.My code is.
id <MWPhoto> assetPhoto = [self photoAtIndex:_currentPageIndex];
UIImage *rotatedImage = [UIImage imageWithCGImage:[assetPhoto.underlyingImage CGImage]];
initWithImage:rotatedImage];
CGRect screenRect = [[UIScreen mainScreen] bounds];
CGFloat screenWidth = screenRect.size.width;
CGFloat screenHeight = screenRect.size.height;
CGFloat radians = DegreesToRadians(90);
UIView *rotatedViewBox = [[UIView alloc] initWithFrame:CGRectMake(0,0, screenWidth, screenHeight)];
CGAffineTransform t = CGAffineTransformMakeRotation(radians);
rotatedViewBox.transform = t;
CGSize rotatedSize = rotatedViewBox.frame.size;
UIGraphicsBeginImageContextWithOptions(rotatedSize, NO, [[UIScreen mainScreen] scale]);
CGContextRef bitmap = UIGraphicsGetCurrentContext();
CGContextTranslateCTM(bitmap, rotatedSize.width / 2, rotatedSize.height / 2);
CGContextRotateCTM(bitmap, radians);
CGContextScaleCTM(bitmap, 1.0, -1.0);
CGContextDrawImage(bitmap, CGRectMake(-self.view.bounds.size.width / 2, -self.view.bounds.size.height / 2 , self.view.bounds.size.width, self.view.bounds.size.height),rotatedImage.CGImage );
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
MWPhoto *r = [MWPhoto photoWithImage:newImage];
[_photos replaceObjectAtIndex:_currentPageIndex withObject:r];
[self performLayout];
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