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Editorial Team
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Asked: 2026-05-20T16:18:51+00:00

I have a UISearchBar in my app. As the user types any term, a

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I have a UISearchBar in my app. As the user types any term, a dynamic search against an external API is performed..I send the entire search term as parameter to the API.

My question is, a user can type very quickly..So is there any way that instead of making a request to the API for every letter the user types, can we create a delay i.e. if the difference between typing 2 successive letters is extremely small, combine that into a single requests (rather than make 2 separate requests)

I currently use

[NSObject cancelPreviousPerformRequestsWithTarget:self];
    [xmlParser performSelector:@selector(parseXMLFile:) withObject:url afterDelay:0.3];

But this is just creating a delay…I want the parseXMLFile to not be executed multiple times if the diff is very small (i.e. user types very quickly)

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1 Answer

  1. Editorial Team

    Use an NSTimer. For example, schedule a timer (with callback for search) to fire after 0.5 second, then if a new search term comes up before timer fires, invalidate it and reschedule.

    If no new search within 0.5, then timer will fire and search will happen.

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