我在 View 中使用了下面的 3dRotation 函数。但我不想在 View 上倾斜/翻转，我只想在 View 上左/右/上/下移动。
我如何避免在 View 中倾斜和翻转旋转？
- (void)Move3dPan:(UIPanGestureRecognizer *)gesture
{
if (gesture.state == UIGestureRecognizerStateChanged)
{
CGPoint displacement = [gesture translationInView:self.view];
CATransform3D currentTransform = self.popUpView.layer.sublayerTransform;
if (displacement.x==0 && displacement.y==0)
{
// no rotation, nothing to do
return;
}
CGFloat totalRotation = sqrt(displacement.x * displacement.x + displacement.y * displacement.y) * M_PI / 360.0;
CGFloat xRotationFactor = displacement.x/totalRotation;
CGFloat yRotationFactor = displacement.y/totalRotation;
CATransform3D rotationalTransform = CATransform3DRotate(currentTransform, totalRotation,
(xRotationFactor * currentTransform.m12 - yRotationFactor * currentTransform.m11),
(xRotationFactor * currentTransform.m22 - yRotationFactor * currentTransform.m21),
(xRotationFactor * currentTransform.m32 - yRotationFactor * currentTransform.m31));
[CATransaction setAnimationDuration:0];
self.popUpView.layer.sublayerTransform = rotationalTransform;
[gesture setTranslation:CGPointZero inView:self.view];
}
}
最佳答案
-(void) startAnimatingCupView
{
[self stopAnimatingCupView];
timer = [NSTimer scheduledTimerWithTimeInterval:0.8 repeats:true block:^(NSTimer * _Nonnull timer) {
[self animateCupView];
}];
}
-(void) animateCupView{
[UIView animateWithDuration:0.4 animations:^{
self.imgCup.transform = CGAffineTransformMakeRotation(DEGREES_TO_RADIANS(180));
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.4 animations:^{
self.imgCup.transform = CGAffineTransformMakeRotation(DEGREES_TO_RADIANS(360));
}];
}];
}
-(void) stopAnimatingCupView{
if (timer != nil) {
[timer invalidate];
timer = nil;
}
[self.imgCup.layer setTransform:CATransform3DIdentity];
}
我希望这能奏效
关于ios - 如何避免在 iOS 中对 CATransform3D 旋转进行倾斜/翻转？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41054948/