How to get perfect X , Y position of rotating UIView in ios

问题

I am using CABasicanimation for rotate an UIView. I am using this code,

    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. If anyone know please help me.

Thank you in advance.

回答1:

I Got A Answer Of This Question Please Go To This Link For Answer

Go to This Link For Answer

回答2:

So, if I understand you correctly, you just want to get the X and Y coordinates of your view during rotation?

You can do this by logging the frame of the presentationLayer, like this:

- (IBAction)buttonAction:(UIButton *)sender {

    CGRect position = [[CircleView.layer presentationLayer] frame];
    NSLog(@"%@", NSStringFromCGRect(position));
}

来源：https://stackoverflow.com/questions/34763819/how-to-get-perfect-x-y-position-of-rotating-uiview-in-ios