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Does -dataWithContentsOfURL: of NSData work in a background thread?

Does -dataWithContentsOfURL: of NSData work in a background thread?

Solution

  • No, it doesn't.

    In order to get data from URL asynchronously you should use the NSURLRequest and NSURLConnection approach.

    You will have to implement the NSURLConnectionDelegate methods:

    -(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response;
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data;
-(void)connectionDidFinishLoading:(NSURLConnection *)connection;
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error;