animation of uiimageView stops - iphone

Question

here is what I wanna do http://www.youtube.com/watch?v=rD3MTTPaK98
and here is my code:
-(void) onTimer {
UIImage * image = [UIImage imageNamed:#"abouffer_03.png"];
imageView = [[UIImageView alloc] initWithImage:image];
[imageView setCenter:[self randomPointSquare]];
[imageViewArray addObject:imageView];
[[self view] addSubview:imageView];
[imageView release];
ix=imageView.center.x;
iy=imageView.center.y;
X=(240-ix)/230;
Y=(160-iy)/230;
coteA=(240-ix);
coteB=(160-iy);
angleDeRotation=atan(coteB/coteA);
if(ix>250||0>iy>320){
imageView.transform = CGAffineTransformMakeRotation(angleDeRotation+3.14);
}
else{
imageView.transform = CGAffineTransformMakeRotation(angleDeRotation);
}
}
-(void)onTimer2{
for(int i=0; i< [imageViewArray count];i++){
imageView = [imageViewArray objectAtIndex:i];
imageView.center = CGPointMake(imageView.center.x + X, imageView.center.y + Y);
}
onTimer is called every 2 seconds
but it doesn't work, there is no error but when a "imageView" is created after 2 seconds it sop moving and go to the same direction of the new " imageView" that has been created. How can I solve this ? sorry for my english I'm french :/

Answer 1

You’re adding X and Y to all of your image views, but it’a always the last-computed value. Make an array of X and Y values and use the value that corresponds with your image view.
Where you define imageViewArray, also define xArray and yArray as NSMutableArrays. Then in -onTimer, when you set X and Y, do this:
[xArray addObject:[NSNumber numberWithFloat:X]];
[yArray addObject:[NSNumber numberWithFloat:Y]];
Finally, in -onTimer2, do this:
-(void)onTimer2{
for(int i=0; i< [imageViewArray count];i++) {
float localX = [(NSNumber *)[xArray objectAtIndex:i] floatValue];
float localY = [(NSNumber *)[yArray objectAtIndex:i] floatValue];
imageView = [imageViewArray objectAtIndex:i];
imageView.center = CGPointMake(imageView.center.x + localX, imageView.center.y + localY);
}
That will use the value of X and Y that you set in -onTimer.