Nstimer with method that have variable

Question

I have a method that have input variable and I need to schedule this method usingNSTimer Unfortunately when I try to make the idea I got some error My code is the following:

My method:

-(void)movelabel:(UILabel *)label {
}

I make my scheduling using the following:

[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(movelabel:myLbabeName) userInfo:nil repeats:YES];

But, I got the following error:

error: expected ':' before ')' token

In other case (case of method without input variable i'm calling the timer like the following:

[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(myMethodNameWithoutVariable) userInfo:nil repeats:YES];

Regards

Answer 1

The selector you give to scheduledTimerWithTimeInterval:target:selector:userInfo:repeats: does not take arbitrary arguments. It should be either a selector without parameter or a selector with a single parameter of type (NSTimer *).

That means you can't directly call moveLabel: with your parameter myLbabeName.

You could use the userInfo dictionary with an intermediary method like this:

(timerRef is a NSTimer class variable)

timerRef = [NSTimer scheduledTimerWithTimeInterval:0.1 
                               target:self 
                               selector:@selector(timerMovelabel:) 
                               userInfo:[NSDictionary dictionaryWithObject:myLbabeName 
                                                                    forKey:@"name"]
                                repeats:YES];

and

- (void)timerMovelabel:(NSTimer *)timer {
    [self movelabel:[[timer userInfo] objectForKey:@"name"]];
}

EDIT

If you want to stop the timer, keep a reference to it and call [timerRef invalidate]