Change NSTimer interval after a certain number of fires

Question

In the following code, the NSTimer interval is set at 1 second between each picture. My goal is to change the interval after the first two pictures, hello.png and b

Answer 1

The best/simpliest way :

    -(void)Timer{

    // Do what you want here

  // modify the frequency value if you want.  
        [NSTimer scheduledTimerWithTimeInterval:frequence target:self selector:@selector(Timer) userInfo:nil repeats:NO];
    }

Frequence is a variable that contains the interval. You just need to call Timer method by yourself the first time ;)

For you, it would give

    -(void)changeImage{
        if (counter == self.images.count - 1 )
            counter = 0;
        else
            counter ++;

        frequence = (counter < 2)?1:4;

        self.animationImageView.image = self.images[counter];
        [NSTimer scheduledTimerWithTimeInterval:frequence target:self selector:@selector(changeImage) userInfo:nil repeats:NO];
    }