Get the Image (UIImage) using asset URL in iOS 7

Question

I have some images in my Photo Album. I have already retrieved the asset urls of all of them.. I want to get a particular image using the asset url... below code gave me asset url..

    ALAssetRepresentation *defaultRepresentation = [asset defaultRepresentation];

                      NSString *uti = [defaultRepresentation UTI];
                      NSURL *URL = [[asset valueForProperty:ALAssetPropertyURLs] valueForKey:uti];

Now using this url, how can I get the image(UIImage)?

http://stackoverflow.com/questions/3837115/display-image-from-url-retrieved-from-alasset-in-iphone and http://stackoverflow.com/questions/14496910/unable-to-load-image-from-asset-url — iPatel, Feb 01 '14 at 05:14

score 10 · Accepted Answer · answered Feb 01 '14 at 05:46

Get Url by this,

NSURL *url= (NSURL*) [[asset valueForProperty:ALAssetPropertyURLs] valueForKey:[[[asset valueForProperty:ALAssetPropertyURLs] allKeys] objectAtIndex:0]];

And get image from url like below.

ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *myasset)
{
    ALAssetRepresentation *rep = [myasset defaultRepresentation];
    @autoreleasepool {
        CGImageRef iref = [rep fullScreenImage];
        if (iref) {
            UIImage *image = [UIImage imageWithCGImage:iref];
            self.loadedImage = image;
            dispatch_async(dispatch_get_main_queue(), ^{
                //UIMethod trigger...
            });
            iref = nil;
        }
    } 
};

ALAssetsLibraryAccessFailureBlock failureblock  = ^(NSError *myerror)
{
    NSLog(@"Can't get image - %@",[myerror localizedDescription]);
};

ALAssetsLibrary* assetslibrary = [[ALAssetsLibrary alloc] init];
[assetslibrary assetForURL:yourUrl
               resultBlock:resultblock
              failureBlock:failureblock];

@Jamil If we do the JOB while scrolling the table view means, it may slow down the rendering for the case sync. that's why I'm using async. — Mani, Nov 10 '16 at 09:50

score 0 · Answer 2 · edited Feb 01 '14 at 05:13

0

UIImage *img = [UIImage imageWithCGImage:[[myAsset defaultRepresentation] fullResolutionImage]

Hope this helps

edited Feb 01 '14 at 05:13

iPatel

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answered Feb 01 '14 at 05:12

Sunny Shah

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4

This doesn't use the Asset URL and hence doesn't answer the question. – Michael Aug 14 '14 at 11:50

Get the Image (UIImage) using asset URL in iOS 7

2 Answers2

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