iOS - UIPinchGestureRecognizer & UIPanGestureRecognizer -重置

Question

在我的缩放和摇摄申请中，我使用了上述手势识别器。这很好用。我想要一个按钮，它将图像带回到初始状态。这意味着显示实际图像或重置到初始状态。有人能告诉我如何做到这一点吗？

守则如下：

-(void)handlePanGesture:(UIPanGestureRecognizer*)recognizer

{
    CGPoint translation = [(UIPanGestureRecognizer*)recognizer translationInView:[self superview]];
    recognizer.view.center = CGPointMake(recognizer.view.center.x + translation.x, recognizer.view.center.y + translation.y);
    [(UIPanGestureRecognizer*)recognizer setTranslation:CGPointMake(0, 0) inView:[self superview]];
}

-(void)handlePinchGesture:(UIPinchGestureRecognizer*)recognizer
{
    static CGRect initialBounds;

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

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

Answer 1

基于@borrden的评论。

1. 检查ImageView的当前中心与原始中心是否相同。如果不重置ImageView的中心。您可以添加一个UIView.animation。让它看起来很好。
2. 通过将imageView设置为imageView，将其调整为原始大小这也可以添加到UIView.animation中。在上面。
3. 代码。根据你的需要做出改变。 UIView.animateWithDuration(0.2，延迟: 0.0，选项：.CurveEaseIn，动画：{//将图像移回中心self.mainImageView.center = self.originalCenter！self.layoutIfNeeded() //调整图像大小为原始self.mainImageView.transform = CGAffineTransformIdentity }，完成:0)