Hey guys I'm doing some image editing with UIImagePickerController. Here is some code in imagePickerController:didFinishPickingMediaWithInfo:
UIImage *editedImg = [info objectForKey:UIImagePickerControllerEditedImage];
UIImageView *imgView = [[UIImageView alloc] initWithImage:editedImg];
CGRect imgFrm = imgView.frame;
float rate = imgFrm.size.height / imgFrm.size.width;
imgFrm.size.width = size;
imgFrm.size.height = size * rate;
imgFrm.origin.x = 0;
imgFrm.origin.y = (size - imgFrm.size.height) / 2;
[imgView setFrame:imgFrm];
UIView *cropView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, size, size)];
[cropView setBackgroundColor:[UIColor blackColor]];
[cropView addSubview:imgView];
UIImage *croppedImg = [MyUtil createUIImageFromUIView:cropView];
The above is to set the image in a size*size view and draw a image from a view when the height of the image returned by picker is smaller than size.
Here is the code of createUIImageFromUIView:(UIView*)view :
+ (UIImage *)createUIImageFromUIView:(UIView *)view
{
UIGraphicsBeginImageContextWithOptions(view.frame.size, NO, 2.0);
CGContextRef ctx = UIGraphicsGetCurrentContext();
[view.layer renderInContext:ctx];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return viewImage;
}
My problem is : when debugging, the 'editedImg'(defined in first line) just shows 'nil'. But, the following code works well. I get the corpView(shows 'nil' too) correctly and get cropped image and can encode it to base64 encoded string for sending to server side. I just want to know why the editedImg is nil(returned by [info objectForKey:UIImagePickerControllerEditedImage], but when I choose to print the info in debug mode, the output is not nil in the console)?
After some searching I accidentally found this : string value always shows nil in objective-c
This is the reason why I always see 'nil' in debug mode while the code works well.