ios – 如何将手势限制在UIImageView的范围内？

概述我想限制黑色图像UIView在girlimageview bounds内移动.我不应该移动到girlimageview之外. 我的girlimageview是带框架的静态图像(5,0,310,320) 我正在使用UIGestureRecognizer在imageview上移动黑色图像. 我尝试使用UIPanGestureRecognizer进行下面的代码限制,但无法限制它. UIPanGestur 我想限制黑色图像UIVIEw在girlimagevIEw bounds内移动.我不应该移动到girlimagevIEw之外. @H_404_7@

@H_404_7@我的girlimagevIEw是带框架的静态图像(5,310,320)

@H_404_7@我正在使用UIGestureRecognizer在imagevIEw上移动黑色图像.

@H_404_7@我尝试使用UIPanGestureRecognizer进行下面的代码限制,但无法限制它.

@H_404_7@

UIPanGestureRecognizer *panTagGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)];[panTagGesture setDelegate:self];[blackanimatevIEw addGestureRecognizer:panTagGesture]; -(voID) handlePan:(UIGestureRecognizer*)panGes{        CGPoint point = [panGes locationInVIEw:girlimagevIEw];        if (point.x < girlimagevIEw.bounds.size.wIDth) {            CGRect newframe = CGRectMake(point.x,point.y,blackanimatevIEw.frame.size.wIDth,blackanimatevIEw.frame.size.height);            blackanimatevIEw.frame = newframe;        }        if (point.y < girlimagevIEw.bounds.size.height-160) {            CGRect newframe = CGRectMake(point.x,blackanimatevIEw.frame.size.height);            blackanimatevIEw.frame = newframe;          }    }

@H_404_7@任何帮助,将不胜感激.

解决方法

- (voID)handlePan:(UIGestureRecognizer*)panGes {CGPoint point = [panGes locationInVIEw:girlimagevIEw];CGRect girlimageVIEwBounds = girlimagevIEw.bounds;CGRect blackAnimateVIEwFrame = blackanimatevIEw.frame;CGfloat newX = MIN(point.x,girlimageVIEwBounds.size.wIDth - blackAnimateVIEwFrame.size.wIDth);newX = MAX(newX,0.0f);CGfloat newY = MIN(point.y,girlimageVIEwBounds.size.height - blackAnimateVIEwFrame.size.height);newY = MAX(newY,0.0f);blackAnimateVIEwFrame.origin.x = newX;blackAnimateVIEwFrame.origin.y = newY;blackanimatevIEw.frame = blackAnimateVIEwFrame;}

@H_404_7@这是代码.如果黑色视图是女孩图像视图的子视图,它应该工作.

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