is there timer in ios

Question

I want to create a timer for example to count 2 sec and after each second an nslog type for example 1 sec passed

any suggestion to do that

Solution 1

yes there is NSTimer, use it as -

[NSTimer scheduledTimerWithTimeInterval:2 target:self selector:@selector() userInfo:nil repeats:NO];

Solution 2

What you're after is NSTimer.

Which, I can't not point out, even a cursory search of the framework docs would have turned up. Laziness IS one of the three Virtues of the Programmer, but c'mon.

Solution 3

You can call your NSTimer like this

[NSTimer scheduledTimerWithTimeInterval:2 target:self selector:@selector(changeValue) userInfo:nil repeats:YES];

changeValue function can be like

-(void)changeValue{
    NSLog("calling function after every two seconds");
}

Solution 4

You might want to use NSTimers timerWithTimeInterval:target:selector:userInfo:repeats: method. Point that towards some object that implements a selector which prints your log entries.

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Comments

[AMH]

target:self selector:@selector(printmESSEAGE:) YOU MEAN , WHEN the printmESSEAGE will be caled , after one second or at the end of the interval , how to control the calling time of this function

[saadnib]

NSTimer will call the specified function in selector after the time interval we pass here.

[AMH]

how to implement the part of firring certain function every 1 sec for 4 sec interval for example

[saadnib]

you have to fire it for every 1 sec, and in that function manage a count that how much time that function executed and after count > 4 call [timer invalidate]; for this you also have to create NSTimer *timer in .h also.

[Dan Ray]

@AMH - No, I mean there's lots of documentation that you might want to look at before coming here and asking big broad general questions.

[Dan Ray]

@AMH - For that matter, guess what the first google result for "timer in ios" is? Google will get you answers MUCH faster than posting your google search on Stack Overflow.