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POHow to know the current position of circle while it is rotating on custom route path?
 

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  1. POHow to know the current position of circle while it is rotating on custom route path?
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    <p>I have used this code to animate the circle along a fixed custom route path along two buttons using their x &amp; y coordinates. Now I want to know the exact location of circle at each route while it is rotating or animating how could I know this?</p> <pre><code>- (void) animateCicleAlongPath:(NSInteger)pt1:(NSInteger)pt2 { UIButton *animatebtn1 = (UIButton *)[self.view viewWithTag:pt1]; UIButton *animatebtn2 = (UIButton *)[self.view viewWithTag:pt2]; NSLog(@"%@",animatebtn1); NSLog(@"%@",animatebtn2); NSLog(@"%@",NSStringFromCGRect(circleView.frame)); int a1; int a2; int b1; int b2; a1=animatebtn1.frame.origin.x; a2=animatebtn1.frame.origin.y; b1=animatebtn2.frame.origin.x; b2=animatebtn2.frame.origin.y; pathAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"]; [UIView setAnimationDidStopSelector:@selector(animationDidStart:)]; pathAnimation.calculationMode = kCAAnimationPaced; pathAnimation.fillMode = kCAFillModeForwards; pathAnimation.removedOnCompletion = YES; CGMutablePathRef curvedPath = CGPathCreateMutable(); CGPathMoveToPoint(curvedPath, NULL, b1, b2); NSLog(@"%@",[finalpath description]); for (int i=0; i&lt;finalpath.count; i++) { int j=[[finalpath objectAtIndex:i]intValue]; UIButton *animatebtn = (UIButton *)[self.view viewWithTag:j]; int p1=animatebtn.frame.origin.x; int p2=animatebtn.frame.origin.y; CGPathAddLineToPoint(curvedPath, NULL, p1,p2); } pathAnimation.path = curvedPath; CGPathRelease(curvedPath); UIGraphicsBeginImageContext(CGSizeMake(20,20)); // CGContextRef ctx = UIGraphicsGetCurrentContext(); //Set context variables CGContextSetLineWidth(context, 1.5); CGContextSetFillColorWithColor(context, [UIColor redColor].CGColor); CGContextSetStrokeColorWithColor(context, [UIColor whiteColor].CGColor); //Draw a circle - and paint it with a different outline (white) and fill color (green) CGContextAddEllipseInRect(context, CGRectMake(1, 1, 18, 18)); CGContextDrawPath(context, kCGPathFillStroke); UIImage *circle = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); circleView = [[UIImageView alloc] initWithImage:circle]; [imageScrollView addSubview:circleView]; [imageScrollView bringSubviewToFront:circleView]; [circleView setHidden:NO]; circleView.alpha=1; pathAnimation.speed=0.5; pathAnimation.duration=10; circleView.animationDuration=10; [circleView.layer addAnimation:pathAnimation forKey:@"moveTheSquare"]; [circleView release]; </code></pre> <p>}</p>
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