UITextView缩放和旋转后，文本消失

Question

我在UIPinchGestureRecognizer上添加了UIRotationGestureRecognizer和UITextView。收缩或旋转时，将更改UITextView对象的transform属性。但是，如果我将其旋转一定角度并放大到一定比例，文本将突然消失。

如果我继续旋转它，文本可能会以某种角度重新出现。

有什么办法可以解决失踪案吗？

这就是我使用手势识别器方法所做的事情。

- (void)onPinchtextView:(UIPinchGestureRecognizer *)pinchGestureRecognizer {
CGFloat scale = pinchGestureRecognizer.scale;
if (pinchGestureRecognizer.state == UIGestureRecognizerStateChanged || pinchGestureRecognizer.state == UIGestureRecognizerStateBegan) {
    self.textView.transform = CGAffineTransformScale(self.textView.transform, scale, scale);
    pinchGestureRecognizer.scale = 1.f;
}

- (void)onRotatetextView:(UIRotationGestureRecognizer *)rotateGestureRecognizer {
    CGFloat rotation = rotateGestureRecognizer.rotation;
    if (rotateGestureRecognizer.state == UIGestureRecognizerStateChanged || rotateGestureRecognizer.state == UIGestureRecognizerStateBegan) {
        self.textView.transform = CGAffineTransformRotate(self.textView.transform, rotation);
        [rotateGestureRecognizer setRotation:0];
    }
}