ios - How to use [NSFileHandle fileHandleForReadingAtPath:url]? -


i want pass assets url 

nsurl *url = [nsurl urlwithstring:@"assets-library://asset/asset.png?id=1000000001&ext=png"]; nsfilehandle *filehandle = [nsfilehandle filehandleforreadingatpath:url] nslog(@"filehandle: %@", filehandle);

i getting 

filehandle = nil;

how can create filehandle object assets url please let me know

becuase want upload file in chunk.


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