[英]How to get perfect X , Y position of rotating UIView in ios
I am using CABasicanimation for rotate an UIView. 我正在使用CABasicanimation来旋转UIView。 I am using this code, 我正在使用此代码,
CABasicAnimation *rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
NSNumber *currentAngle = [CircleView.layer.presentationLayer valueForKeyPath:@"transform.rotation"];
rotationAnimation.fromValue = currentAngle;
rotationAnimation.toValue = @(50*M_PI);
rotationAnimation.duration = 50.0f; // this might be too fast
rotationAnimation.repeatCount = HUGE_VALF; // HUGE_VALF is defined in math.h so import it
[CircleView.layer addAnimation:rotationAnimation forKey:@"rotationAnimationleft"];
in this i want perfect X,Y position while "UIView" is rotating. 在这里我想要完美的X,Y位置,而“UIView”正在旋转。 If anyone know please help me. 如果有人知道请帮助我。
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So, if I understand you correctly, you just want to get the X and Y coordinates of your view during rotation? 所以,如果我理解正确,你只想在旋转过程中获得视图的X和Y坐标?
You can do this by logging the frame of the presentationLayer, like this: 您可以通过记录presentationLayer的框架来完成此操作,如下所示:
- (IBAction)buttonAction:(UIButton *)sender {
CGRect position = [[CircleView.layer presentationLayer] frame];
NSLog(@"%@", NSStringFromCGRect(position));
}
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