问题
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)?
回答1:
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];
回答2:
UIImage *img = [UIImage imageWithCGImage:[[myAsset defaultRepresentation] fullResolutionImage]
Hope this helps
来源:https://stackoverflow.com/questions/21494338/get-the-image-uiimage-using-asset-url-in-ios-7