Question

I want to animate increment of numbers starting from 1 to a limit (variable) , the duration of animation is 1.5 seconds. each time when I call the method this animation should work ( animate increment from 0 to (eg: 70 ).
int j=1;

[UIView beginAnimations:nil context:nil]; 
[UIView setAnimationDuration: 1.5]; 
[UIView setAnimationDelegate: self];

do{
self.label.text=[NSString stringWithFormat:@"%ï", j];
}

while(j<=limit);

 [UIView commitAnimations];

Please help to animate the incrementing of the numbers…..

Answer 1

You can’t do something like this. You can only animate the animatable properties of a view. These are: frame, bounds, center, transform, alpha, backgroundColor and contentStretch.

You want to use a NSTimer that updates the label every 1.5 seconds.

Probably something along those lines:

- (void)startAnimationWithLimit:(NSInteger)limit {
    self.limit = limit;
    self.timerFireCount = 0;
    [self.timer invalidate];        // stop timer if one is running already
    self.timer = [NSTimer scheduledTimerWithTimeInterval:1.5f target:self selector:@selector(timerFired:) userInfo:nil repeats:YES];
}

- (void)timerFired:(NSTimer *)timer {
    self.timerFireCount++;
    self.label.text = [NSString stringWithFormat:@"%i", self.timerFireCount];
    if (self.timerFireCount > self.limit) {
        [timer invalidate];
        self.timer = nil;
        self.label.text = @"Press start";
    }
}

and then start the timer with [self startAnimationWithLimit:70];