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Retina display problem #23

abiaad opened this Issue · 2 comments

3 participants


I'm using ELCImagePickerController for my application. This is great but compared to the original picker controller it seems that the image saved is not retina ready. I compared two images and the one from ELCImagePicker is a bit pixeled ...

Here's the code that is getting the UIImage :

for(ALAsset *asset in _assets) {

        NSMutableDictionary *workingDictionary = [[NSMutableDictionary alloc] init];
        [workingDictionary setObject:[asset valueForProperty:ALAssetPropertyType] forKey:@"UIImagePickerControllerMediaType"];
        [workingDictionary setObject:[UIImage imageWithCGImage:[[asset defaultRepresentation] fullScreenImage]] forKey:@"UIImagePickerControllerOriginalImage"];
        [workingDictionary setObject:[[asset valueForProperty:ALAssetPropertyURLs] valueForKey:[[[asset valueForProperty:ALAssetPropertyURLs] allKeys] objectAtIndex:0]] forKey:@"UIImagePickerControllerReferenceURL"];

        [returnArray addObject:workingDictionary];

        [workingDictionary release];    

Do you know how can I do to correctly render my images (for retina) ? I tried to change - fullScreenImage property to - fullResolutionImage but the result is insanely huge (400 ko to 1 Mo for a photo). Thanks for your help !


Be sure that when you scale down the image in your code to use the dimension * 2 on retina devices.

When you want to show an image in a 40x40 view, you should scale the image down to 80x80 on retina devices and add it to a 40x40 sized image view.


Changing the scale part of the following to [UIScreen mainScreen].scale should fix this.
This is also done in commit: 3894cf2
UIImage *img = [UIImage imageWithCGImage:imgRef

To be:
UIImage *img = [UIImage imageWithCGImage:imgRef
scale:[UIScreen mainScreen].scale

@jvanmetre jvanmetre closed this
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