iphone - How to cancel the link like this? -

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i used nstimer update data in link every seconds,and method this:

nsstring *url=[nsstring stringwithformat:@"http://disca.malauu.com/jsbfall.txt"]; nserror *error=[nsstring stringwithformat:@"you error"]; nsstring *urldata=[nsstring stringwithcontentsofurl:[nsurl urlwithstring:url] encoding:nsutf8stringencoding error:&error]; nslog(@"urlstring:%@",urldata);

and if network conges,the connection connect long time.how can cancel if link doesn't update data half of second? can me answer,think much!

if think implement using nsurlconnection , delegate pattern allow cancel connection, , set options timeout.
second advantage request performed asynchronously, , won't block execution of app, if network doesn't answer immediatly.

you find more information way, on nsurlconnection class reference page, , in url loading system programming guide.


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