如何使用捏缩放（UIPinchGestureRecognizer）来改变UITextView的宽度？ [英] How can I use pinch zoom(UIPinchGestureRecognizer) to change width of a UITextView?

问题描述

我可以使用 UIPinchGestureRecognizer 处理程序来处理扩展对象，但我不想扩展我想要更改大小。例如，我有一个 UITextView ，我已经附加了一个 UIPinchGestureRecognizer 手势，如果用户捏我想要更改textview的宽度以匹配夹点。我不想缩放它，所以 UITextView 更大（缩放）。

I can get the UIPinchGestureRecognizer handler to work with scaling an object but I don't want to scale I want to change the size. For example I have a UITextView and I've attached a UIPinchGestureRecognizer gesture to it and if the user pinches I want to change the width of the textview to match the pinch. I don't want to scale it so the UITextView is larger(zooming).

推荐答案

我正在做同样的事情。
如果我发现如何做，我会更新这篇文章。

I am doing the very same thing. I will update this post if I found how to do it.

试试这个，它对我有用（对于UIView）：

Try this, it work for me (for UIView):

- (IBAction)handlePinchGesture:(UIGestureRecognizer *)sender {
    static CGRect initialBounds;

    UIView *_view = sender.view;

    if (sender.state == UIGestureRecognizerStateBegan)
    {
        initialBounds = _view.bounds;
    }
    CGFloat factor = [(UIPinchGestureRecognizer *)sender scale];

    CGAffineTransform zt = CGAffineTransformScale(CGAffineTransformIdentity, factor, factor);
    _view.bounds = CGRectApplyAffineTransform(initialBounds, zt);
    return;
}

这篇关于如何使用捏缩放（UIPinchGestureRecognizer）来改变UITextView的宽度？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！