Question

我有一个NSPageController - 控制器，可让用户在水平视图之间滑动。

问题在于，我们滑动到的视图中的一个视图上有一个NSTableView。此时我无法刷回以前的视图，因为NSTableView正在“吃掉”所有滑动手势。有没有人知道如何在NSTableView上禁用仅水平滚动，以便水平滑动栅格会转到NSPageController而不是表格的视图？

Answer 1

试试这个

- (void)scrollWheel:(NSEvent *)theEvent
{
    [self.nextResponder scrollWheel:theEvent];
}

希望它有所帮助。

Answer 2

使用以下NSScrollView的自定义类实现

在Swift中解决

class HorizontalScrollDisabledTable: NSScrollView {
    var currentScrollIsHorizontal: Bool = true;

    override func scrollWheel(theEvent: NSEvent) {

        var phase: NSEventPhase = theEvent.phase

        /* Ensure that both scrollbars are flashed when the user taps trackpad with two fingers */
        if (phase == .MayBegin) {
            super.scrollWheel(theEvent) ;
            self.nextResponder?.scrollWheel(theEvent);
            return;
        }
        /* Check the scroll direction only at the beginning of a gesture for modern scrolling devices */
        /* Check every event for legacy scrolling devices */
        if (phase == .Began || (phase == .None && theEvent.momentumPhase == .None)) {
            currentScrollIsHorizontal = fabs(theEvent.scrollingDeltaX) > fabs(theEvent.scrollingDeltaY);
        }
        if (!currentScrollIsHorizontal ) {
            super.scrollWheel(theEvent);
        } else {
            self.nextResponder!.scrollWheel(theEvent);
        }
    }
}

以下是上面的scrollWheel方法的相同答案的代码，但是在ObjectiveC中。

-(void)scrollWheel:(NSEvent *)theEvent {

    NSEventPhase phase = [theEvent phase];

    /* Ensure that both scrollbars are flashed when the user taps trackpad with two fingers */
    if (phase == NSEventPhaseMayBegin) {
        [super scrollWheel:theEvent];
        [self.nextResponder scrollWheel:theEvent];
            return;
    }
    /* Check the scroll direction only at the beginning of a gesture for modern scrolling devices */
    /* Check every event for legacy scrolling devices */
    if (phase == NSEventPhaseBegan || (phase == NSEventPhaseNone && theEvent.momentumPhase == NSEventPhaseNone)) {
        currentScrollIsHorizontal = fabs(theEvent.scrollingDeltaX) > fabs(theEvent.scrollingDeltaY);
    }
    if (!currentScrollIsHorizontal ) {
        [super scrollWheel:theEvent];
    } else {
        [self.nextResponder scrollWheel:theEvent];
    }
}

Answer 3

创建一个bool，允许你的panGesture在panScrollView内进行操作。

-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
self.blockPanGesture = YES;
}

-(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:
    (BOOL)decelerate
{
self.blockPanGesture = NO;
}

然后

-(void)panScrollView:(UIPanGestureRecognizer *)panGestureRecognizer
{
  if(self.blockPanGesture == NO)
   {
   // do the stuff
   }
}

如果您正在平移整个桌面视图，我会将手势识别器放在tableView本身上......否则还有

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {

// Return YES if you want the specified item to be editable.
return YES;
}

为您处理所有这些......但我假设您不想使用此功能。您也可以构建此逻辑，例如，您可能希望在scrollView也可以调整时进行调整，方法是将相似的检查放入 - （void）scrollViewWillBeginDragging：（UIScrollView *）scrollView等。

如何在objectiveC OSX中使用NSPageController禁用NSTableView的滚动事件？

3 个答案: