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

debugcn 发表于 Dev

只是一个编码员

我有一个NSPageController-控制器，使用户可以在视图之间水平滑动。

问题在于，在我们要滑动的视图上有一个视图NSTableView。那时，我无法滑动回到以前的视图，因为该按钮NSTableView正在“吃掉”所有滑动手势。有谁知道如何仅禁用上的水平滚动，NSTableView以便水平滑动手势可以转到NSPageController而不是表格的视图？

只是一个编码员

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);
        }
    }
}

这是上面的scrollWheel方法的相同答案的代码，但在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];
    }
}

本文收集自互联网，转载请注明来源。

如有侵权，请联系[email protected] 删除。