关于实施的一个简单问题。
我正在尝试重新创建：
https://i.imgur.com/lFXKFXl.mp4
我想知道我是否必须使用UICollectionView从头开始，有一个内置的Xcode方法，或者某个地方有一个库。
注意：我不打算在底部创建标签栏菜单，而是在导航控制器导航栏下方的顶部创建水平滑动功能。 Instagram也在搜索标签下面有这个。
谢谢！
答案 0 :(得分：1)
您可以使用-1, Microsoft.SharePoint.Client.InvalidClientQueryException
The expression "'CountryCDH:("USA")','(ColorChoiceCDH:("Red"),ColorChoiceCDH:("Blue"))'" is not valid.
并向其添加子视图控制器。我对UIViewController进行了扩展，可以轻松地创建滑动视图。
UIScrollView对于标签栏菜单，您可以通过在extension UIViewController {
public func addViewControllerToContainer(viewController: UIViewController, count: CGFloat = 0, container: UIScrollView, heightDecrease: CGFloat = 0, startIndex: CGFloat = 0) {
let multiplier: CGFloat = count
addChildViewController(viewController)
container.addSubview(viewController.view)
container.contentSize.width += viewController.view.frame.width
container.contentSize.height = viewController.view.frame.height - heightDecrease
container.frame = CGRect(x: viewController.view.frame.origin.x, y: viewController.view.frame.origin.y, width: viewController.view.frame.width, height: viewController.view.frame.height - heightDecrease)
container.frame.origin.y += heightDecrease
container.contentOffset.x = container.frame.width * startIndex
viewController.view.frame.size.width = container.frame.width
viewController.view.frame.size.height = container.frame.height
viewController.view.frame.size.height -= heightDecrease
viewController.view.frame.origin.x = container.frame.width * multiplier
}
public func addViewControllersToContainer(viewControllers: [UIViewController], container: UIScrollView, heightDecrease: CGFloat = 0, startIndex: CGFloat) {
var count: CGFloat = 0
for viewController in viewControllers {
addViewControllerToContainer(viewController: viewController, count: count, container: container, heightDecrease: heightDecrease, startIndex: startIndex)
count += 1
}
}
}
class MainSwipeViewController: UIViewController {
let viewControllers: [UIViewController] = [VC1, VC2, VC3] // view controllers swiped between
let startIndex: CGFloat = 0 // which viewController to begin at (0 means first)
let mainScrollView: UIScrollView = {
let scrollView = UIScrollView()
scrollView.backgroundColor = .lightGray
scrollView.isPagingEnabled = true
scrollView.showsHorizontalScrollIndicator = false
scrollView.bounces = false
scrollView.contentInsetAdjustmentBehavior = .never
scrollView.backgroundColor = UIColor.clear
return scrollView
}()
private func addViewControllers(_ vc: UIViewController, viewControllers: [UIViewController], startIndex: CGFloat = 0) {
view.addSubview(mainScrollView)
addViewControllersToContainer(viewControllers: viewControllers, container: mainScrollView, startIndex: startIndex)
}
override func viewDidLoad() {
super.viewDidLoad()
addViewControllers(self, viewControllers: viewControllers, startIndex: startIndex)
}
}
中实施UIScrollViewDelegate轻松创建
MainSwipeViewController extension MainSwipeViewController: UIScrollViewDelegate {
func scrollViewDidScroll(_ scrollView: UIScrollView) {
let contentOffset = scrollView.contentOffset.x / view.frame.width
}
}
是您滑动的间隔，每次滑动时都会增加1。这将帮助您为菜单中的蓝色条设置动画。
答案 1 :(得分：1)
您可以按照以下方式为蓝色条设置动画
func scrollViewDidScroll(_ scrollView: UIScrollView) {
blueBarViewLeadingConstraint.constant = scrollView.contentOffset.x / (scrollView.bounds.width / (TabBarView.frame.size.width / numberOfTab))
}