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How to get last modified date using ALAsset class in iOS

Mark Devid 1689 20-Dec-2015
I want to get the last modified date from ALAsset type video?
I tried with:
NSDate *date = [dateFormatter dateFromString:[[[[asset defaultRepresentation] metadata] objectForKey:@"{TIFF}"] objectForKey:@"DateTime"]];
but metadata is coming empty for a video.
Please help me.

Updated on 20-Dec-2015
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