- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
UITouch *touch = [touches anyObject];
CGPoint origin = [self.imageView center];
// sample code inside Touchesbegan method
CGRect tempRect = CGRectMake(0, 0, 320, 200);
if (CGRectContainsPoint(tempRect, [touch locationInView:self.view]))
{
// do some thing
CGFloat angle = angleBetweenLinesInRadians(origin, [touch previousLocationInView:self.view], origin, [touch locationInView:self.view]);
// NSLog(@"angle %2f",angle);
i=i+angle;
// NSLog(@"value of i %f",i);
self.imageView.layer.doubleSided=FALSE;
//self.imageView2.hidden = YES;
self.imageView.layer.transform=CATransform3DMakeRotation(i, 0.0, 0.1, 0.0);
self.imageView2.layer.transform=CATransform3DMakeRotation(i, 0.0, 0.1, 0.0);
// NSLog(@"position.z %f",self.imageView.layer.zPosition);
// NSLog(@"position.y %f",self.imageView.layer.position.y);
CALayer* layer = [self.imageView.layer presentationLayer];
float currentAngle = [[layer valueForKeyPath:@"transform.rotation.z"] floatValue];
NSLog(@"currentAngle %f",currentAngle);
CALayer* layer2 = [self.imageView2.layer presentationLayer];
float currentAngle2 = [[layer2 valueForKeyPath:@"transform.rotation.z"] floatValue];
NSLog(@"currentAngle2 %f",currentAngle2);
}
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
CALayer* layer = [self.imageView.layer presentationLayer];
float currentAngle = [[layer valueForKeyPath:@"transform.rotation.z"] floatValue];
NSLog(@"currentAngle %f",currentAngle);
if (currentAngle==0) {
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.75];
[UIView setAnimationDelay:0.0];
[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
self.imageView.layer.transform=CATransform3DMakeRotation(0, 0.0, 0.1, 0.0);
self.imageView2.layer.transform=CATransform3DMakeRotation(0, 0.0, 0.1, 0.0);
[UIView commitAnimations];
i=0;
}else {
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.75];
[UIView setAnimationDelay:0.0];
[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
self.imageView.layer.transform=CATransform3DMakeRotation(3.14, 0.0, 0.1, 0.0);
self.imageView2.layer.transform=CATransform3DMakeRotation(3.14, 0.0, 0.1, 0.0);
[UIView commitAnimations];
i=3.14;
}
}
static inline CGFloat angleBetweenLinesInRadians(CGPoint line1Start, CGPoint line1End, CGPoint line2Start, CGPoint line2End) {
CGFloat a = line1End.x - line1Start.x;
CGFloat b = line1End.y - line1Start.y;
CGFloat c = line2End.x - line2Start.x;
CGFloat d = line2End.y - line2Start.y;
CGFloat line1Slope = (line1End.y - line1Start.y) / (line1End.x - line1Start.x);
CGFloat line2Slope = (line2End.y - line2Start.y) / (line2End.x - line2Start.x);
CGFloat degs = acosf(((a*c) + (b*d)) / ((sqrt(a*a + b*b)) * (sqrt(c*c + d*d))));
return (line2Slope > line1Slope) ? degs : -degs;
}
