围绕anchorPoint的旋转正在进行跳跃

Question

我有UIView的子类TagView。我围绕锚点旋转它，如下所示：

double rads = DEGREES_TO_RADIANS(self.angle);
[self setAnchorPoint:self.anchor forView:self];
CGAffineTransform transform = CGAffineTransformRotate(CGAffineTransformIdentity, rads);
self.transform = transform;

我正在使用提议的here:方法设置锚点

- (void)setAnchorPoint:(CGPoint)anchorPoint forView:(UIView *)view {
    CGPoint newPoint = CGPointMake(view.bounds.size.width * anchorPoint.x, 
                                   view.bounds.size.height * anchorPoint.y);
    CGPoint oldPoint = CGPointMake(view.bounds.size.width * view.layer.anchorPoint.x, 
                                   view.bounds.size.height * view.layer.anchorPoint.y);

    newPoint = CGPointApplyAffineTransform(newPoint, view.transform);
    oldPoint = CGPointApplyAffineTransform(oldPoint, view.transform);

    CGPoint position = view.layer.position;

    position.x -= oldPoint.x;
    position.x += newPoint.x;

    position.y -= oldPoint.y;
    position.y += newPoint.y;

    view.layer.position = position;
    view.layer.anchorPoint = anchorPoint;
}

我有一个自动布局的问题，我已经修复了，通过将我的视图放在容器UIView中并将其设置在中心。但是当我改变我视图中的标签的内容时，它会跳转。

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