How to stop this sequence? - ios

Question

i am animating a frame, through this code, which is easily understandable in code, now i am trying to stop this sequence after 20 time means in completion parentheses i need to call that function for 20 times only: how can i do that?
-(void)conveyComplete:(UIView*)v
{
[self convey:v delay:0];
}
-(void)convey:(UIView*)v delay:(int)nDelay
{
[UIView animateWithDuration:.5
delay:nDelay
options:(UIViewAnimationOptionCurveLinear | UIViewAnimationOptionAllowUserInteraction)
animations: ^
{
CGRect rPos = v.frame;
NSLog(#"x:%f y:%f vFrame:%f vFrame:%f" , rPos.origin.x,rPos.origin.y,v.frame.origin.x,v.frame.origin.y);
rPos.origin.x -= 5;
rPos.origin.y -=100;
v.frame = rPos;
}
completion: ^(BOOL finished)
{
[self conveyComplete:v];
NSLog(#"I:%i, F:%i",i,f);
}];
}

Answer 1

As your function does only animation, one possible solution is not to call function 20 times, but instead set repeat count of animation with setAnimationRepeatCount: method.
It'll looks something similar to this:
[UIView UIView animateWithDuration:.5
delay:nDelay
options:(UIViewAnimationOptionRepeat | ...)
animations: ^{
// Do your animation stuff
[UIView setAnimationRepeatCount:20];
}
completion:NULL];
But one other aspect that is worth regarding is whether you need to repeat animation 20 times at all. All you do is just stepwise shifting of you view frame. Why not to animate this at once by setting appropriate offsets and animation duration?

Answer 2

i have made a global integer:
int i=1;
-(void)conveyComplete:(UIView*)v{
[self convey:v delay:0];
}
-(void)convey:(UIView*)v delay:(int)nDelay{
[UIView animateWithDuration:.5
delay:nDelay
options:(UIViewAnimationOptionCurveLinear | UIViewAnimationOptionAllowUserInteraction)
animations: ^
{
CGRect rPos = v.frame;
i+=1;// then increase +1 every time it runs
NSLog(#"x:%f y:%f vFrame:%f vFrame:%f" , rPos.origin.x,rPos.origin.y,v.frame.origin.x,v.frame.origin.y);
rPos.origin.x -= 5;
rPos.origin.y -=100;
v.frame = rPos;
}
completion: ^(BOOL finished)
{
if(i<20){
[self conveyComplete:v];
}
NSLog(#"I:%i, F:%i",i,f);
}];
}