Question

我正在尝试在选择视图时使用幻灯片为NSTabView的每个视图设置动画。我有一种方式工作，但它只在我第一次选择一个新的选项卡视图时动画。之后我在切换标签视图时看不到动画，虽然我可以看到每次都触发该功能。？

override func tabView(tabView: NSTabView, didSelectTabViewItem tabViewItem: NSTabViewItem) {
    tabViewItem.view!.setFrameOrigin(NSPoint(x: tabViewItem.view!.frame.origin.x + 300, y: tabViewItem.view!.frame.origin.y))
    tabViewItem.view!.animator().setFrameOrigin(NSPoint(x: tabViewItem.view!.frame.origin.x - 300, y: tabViewItem.view!.frame.origin.y))
    // i can see this fires every time i switch tab views but the animation only works the fist time
}

Answer 1

我已经改变了一点来解决第一次问题。只需定义一个整数即可在代理中存储上一个选项卡索引。

- (void)tabView:(NSTabView *)tabView didSelectTabViewItem:(NSTabViewItem *)tabViewItem{

    CABasicAnimation *controlPosAnim = [CABasicAnimation animationWithKeyPath:@"position"];
    if (prevTabViewIndex>[tabView indexOfTabViewItem:tabViewItem]) {
        [controlPosAnim setFromValue:[NSValue valueWithPoint:CGPointMake(tabViewItem.view.frame.origin.x - 500,tabViewItem.view.frame.origin.y)]];

    } else {
        [controlPosAnim setFromValue:[NSValue valueWithPoint:CGPointMake(tabViewItem.view.frame.origin.x + 500,tabViewItem.view.frame.origin.y)]];
    }

    [controlPosAnim setToValue:[NSValue valueWithPoint:CGPointMake(tabViewItem.view.frame.origin.x,tabViewItem.view.frame.origin.y)]];
    [[tabViewItem.view layer] addAnimation:controlPosAnim forKey:@"controlViewPosition"];
    [tabViewItem.view setAnimations:[NSDictionary dictionaryWithObjectsAndKeys:controlPosAnim, @"frameOrigin", nil]];

    [tabViewItem.view.animator setFrameOrigin : CGPointMake(tabViewItem.view.frame.origin.x,tabViewItem.view.frame.origin.y)];

    prevTabViewIndex = [tabView indexOfTabViewItem:tabViewItem];
}

Answer 2

您必须确保NSTabView项具有图层支持，因此（例如，在windowDidLoad（）中）调用一次：

for tabViewItem in self.tabView.tabViewItems {
  if let tabViewItemView = tabViewItem.view {
    tabViewItemView.wantsLayer = true
  }
}

这是穆哈雷姆针对Swift的答案的更新版本，具有正确的动画偏移量：

private var previousTabViewIndex: Int = 0

public func tabView(_ tabView: NSTabView, didSelect tabViewItem: NSTabViewItem?) {
  guard let tabViewItem = tabViewItem,
        let tabViewItemView = tabViewItem.view,
        let tabViewItemLayer = tabViewItemView.layer else { return }

  let animation = CABasicAnimation(keyPath: #keyPath(CALayer.position))
  let tabViewIndex = tabView.indexOfTabViewItem(tabViewItem)
  let origin = CGPoint(x: tabViewItemView.frame.origin.x, y: tabViewItemView.frame.origin.y)
  var offsetX = self.tabView.frame.width
  if self.previousTabViewIndex > tabViewIndex {
    offsetX *= -1
  }

  animation.fromValue = NSValue(point: CGPoint(x: origin.x + offsetX, y: origin.y))
  animation.toValue = NSValue(point: origin)
  tabViewItemLayer.add(animation, forKey: "controlViewPosition")

  self.previousTabViewIndex = tabViewIndex
}

动画NSTabView视图

2 个答案: