iOS:对象重叠时禁用平移手势 [英] iOS: disable pan gesture when objects overlap

问题描述

我使用Pan Gesture移动了一些对象.现在，我希望对象在以下任一情况下停止永久移动:

I have a few objects moved by using Pan Gesture. Now I want the object to stop moving permanently when either:

1. 它与特定的(固定的，无法移动的)对象重叠， 或
2. 它会输入一定范围的位置.

1. It overlaps a particular (stationary, not able to be moved) object, or
2. It enters a certain range of locations.

当两个对象重叠时，我尝试使用removeGestureRecogniser停止它，但是它不起作用.

I've tried to stop it when the two objects overlap using removeGestureRecogniser but it didn't work.

- (IBAction)cowimagemove:(UIPanGestureRecognizer *)recognizer {

if (cowimage.center.x==stayimage.center.x) {
    [self removeGestureRecogniser];
    }
else {
    CGPoint translation = [recognizer translationInView:self.view];
    recognizer.view.center = CGPointMake(recognizer.view.center.x + translation.x,
                                         recognizer.view.center.y + translation.y);
    [recognizer setTranslation:CGPointMake(0, 0) inView:self.view];
    }
}

推荐答案

尝试捕获UIGestureRecognizer委托中的重叠项.

Try catching the overlap in your UIGestureRecognizer Delegate.

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
   if ([self checkForOverlap:gestureRecognizer]) {
       return NO;
   } 
   return YES;

}

在checkForOverlap方法中，您使用手势识别器对象测试相关点等，如果是这种情况，则返回YES.

In your checkForOverlap method you use the gesture recognizer object to test for the relevant points etc. and return YES if it is the case.

(当然，上面的缩写是

return ![self checkForOverlap:gestureRecognizer];

)

这篇关于iOS:对象重叠时禁用平移手势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！