UIPinchGestureRecognizer在不同的x和y方向上缩放视图

Question

我不想将比例用作经典缩放,而是我想将quadrates的形式更改为矩形.经过大量的尝试,我的手指是长方形的角落.所以,但如果我在我的视图中开始一个新的捏手势,我的手指变小,而不是像正常的尺度那样变大.

if ([gestureRecognizer numberOfTouches] >1) {
    //getting width and height between gestureCenter and one of my finger
    float x = [gestureRecognizer locationInView:self].x - [gestureRecognizer locationOfTouch:0 inView:self].x;
    if (x<0) {
        x *= -1;
    }
    float y = [gestureRecognizer locationInView:self].y - [gestureRecognizer locationOfTouch:0 inView:self].y;
    if (y<0) {
        y *= -1;
    }
    //double size cause x and y is just the way from the middle to my finger
    float width = x*2;
    if (width < 1) {
        width = 1;
    }
    float height = y*2;
    if (height < 1) {
        height = 1;
    }
    self.bounds = CGRectMake(self.bounds.origin.x , self.bounds.origin.y , width, height);
    [gestureRecognizer setScale:1];
    [[self layer] setBorderWidth:2.f];
}

有没有人知道一种制作XY尺度的方法,它不会调整到我的手指位置作为角落.

非常感谢你

Answer 1

得到了解决方案

- (void) scaleSelfWith:(UIPinchGestureRecognizer *)gestureRecognizer{
if ([gestureRecognizer numberOfTouches] >1) {

    //getting width and height between gestureCenter and one of my finger
    float x = [gestureRecognizer locationInView:self].x - [gestureRecognizer locationOfTouch:1 inView:self].x;
    if (x<0) {
        x *= -1;
    }
    float y = [gestureRecognizer locationInView:self].y - [gestureRecognizer locationOfTouch:1 inView:self].y;
    if (y<0) {
        y *= -1;
    }

    //set Border
    if (gestureRecognizer.state == UIGestureRecognizerStateBegan) {
        xDis = self.bounds.size.width - x*2;
        yDis = self.bounds.size.height - y*2;
    }

    //double size cause x and y is just the way from the middle to my finger
    float width = x*2+xDis;
    if (width < 1) {
        width = 1;
    }
    float height = y*2+yDis;
    if (height < 1) {
        height = 1;
    }
    self.bounds = CGRectMake(self.bounds.origin.x , self.bounds.origin.y , width, height);
    [gestureRecognizer setScale:1];
    [[self layer] setBorderWidth:2.f];
}
}  

将xDif和yDif添加到我从视图侧面触摸的距离.
在比例后,我将它们添加到大小