Handle cache in diskOperation

[huntrax11]

would you like to handle cache in disk operation? You know some code like above-

• (NSData)dataForKey:(NSString)key { if([self hasCacheForKey:key]) { return [NSData dataWithContentsOfFile:cachePathForKey(key) options:0 error:NULL]; } else { for(NSInvocationOperation* operation in [diskOperationQueue operations]){ NSInvocation invocation=[operation invocation]; NSString path=nil; NSData *data=nil; [invocation getArgument:&path atIndex:3]; if([path hasSuffix:key]){ [invocation getArgument:&data atIndex:2]; return data; } } return nil; } }