Please confirm: NSTimer is to repeatedly make an event occur at intervals

Question

I'm trying to make an iOS app. As part of the app, I want a UIScrollView to scroll every X seconds. I believe that I need to use NSTimer. Is this correct?

score 3 · Accepted Answer · answered Oct 28 '10 at 18:09

3

Yes. You can use NSTimer for this:

float interval = 2.5f; //whatever interval you want
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:interval target:someTarget selector:@selector(someSelector:) userInfo:nil repeats:YES];

answered Oct 28 '10 at 18:09

Jacob Relkin

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score 2 · Answer 2 · edited May 23 '17 at 11:47

2

Yes. You can use NSTimer to perform either a delayed event or a periodic event. There is a good post on using NSTimer here.

edited May 23 '17 at 11:47

Community

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answered Oct 28 '10 at 18:10

Error 454

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score 1 · Answer 3 · answered Oct 28 '10 at 18:07

Yes.

NSTimer* theTimer = [NSTimer scheduledTimerWithTimeInterval:X
                                                     target:someController
                                                   selector:@selector(scrollThatView)
                                                   userInfo:nil
                                                    repeats:YES];

score 0 · Answer 4 · answered Oct 28 '10 at 18:07

0

You don’t need to use an NSTimer—there are other ways to do it—but yes, an NSTimer will allow you to do so.

answered Oct 28 '10 at 18:07

Jeff Kelley

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Really, what else can be used? – Moshe Oct 28 '10 at 18:15
Well, you could run code in a background thread that polled the time every run, you could run code in a background thread that sleeps between invocations, etc. An `NSTimer` is probably your best bet, though. – Jeff Kelley Oct 28 '10 at 19:37

Please confirm: NSTimer is to repeatedly make an event occur at intervals

4 Answers4