Objective c 在ScrollView中移动UIImageView

在我的scrollview中，我有多个ImageView，当用户点击LONGPRESS时，我可以移动每个ImageView。我使用

UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(moveImage:)];
[panGesture setMaximumNumberOfTouches:2];
[panGesture setDelegate:self];
[imageview addGestureRecognizer:panGesture];


UILongPressGestureRecognizer *longPressRecognizer = [[UILongPressGestureRecognizer alloc] init];
[imageview addGestureRecognizer:longPressRecognizer];

- (BOOL) gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {

return YES;
}



- (void)adjustAnchorPointForGestureRecognizer:(UIGestureRecognizer *)gestureRecognizerv     {
if (gestureRecognizer.state == UIGestureRecognizerStateBegan) {
    UIView *piece = gestureRecognizerv.view;
    CGPoint locationInView = [gestureRecognizerv locationInView:piece];
    CGPoint locationInSuperview = [gestureRecognizerv locationInView:piece.superview];

    piece.layer.anchorPoint = CGPointMake(locationInView.x / piece.bounds.size.width, locationInView.y / piece.bounds.size.height);
    piece.center = locationInSuperview;
}
}


- (void)moveImage:(UIPanGestureRecognizer *)gestureRecognizerg
{
NSLog(@"sdfgdsgsdg");
UIView *piece = [gestureRecognizerg view];
[self adjustAnchorPointForGestureRecognizer:gestureRecognizerg];

// need to test if the scrollview is already using the touches. If it is, leave them
if (!galleryView.tracking) {
    if ([gestureRecognizerg state] == UIGestureRecognizerStateBegan || [gestureRecognizerg state] == UIGestureRecognizerStateChanged) {
        CGPoint translation = [gestureRecognizerg translationInView:[piece superview]];

        [piece setCenter:CGPointMake([piece center].x + translation.x, [piece center].y + translation.y)];
        [gestureRecognizerg setTranslation:CGPointZero inView:[piece superview]];
    }
}
}

---

这里我的问题是，IMAGEVIEW在scollview中到处移动，我需要重新排列视图，就像Gallery view一样。

要获得这种重新排列行为，你需要有一些逻辑来设置网格并“捕捉”元素，在需要时移动元素，等等。它相当复杂。您当前的代码只是用手势移动视图

然而，如果你能够瞄准iOS 6及以上版本，你几乎肯定会想使用

UICollectionView

，这会让你免费获得很多。集合视图简化了重新安排后的布局和逻辑，通常会使您的生活更加轻松