【问题标题】:tabbar transition animation topbar color issuetabbar 过渡动画 topbar 颜色问题
【发布时间】:2020-06-12 11:12:42
【问题描述】:

我使用这个函数来动画标签栏的过渡

func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool {

        guard let tabViewControllers = tabBarController.viewControllers, let toIndex = tabViewControllers.firstIndex(of: viewController) else {
            return false
        }
         animateToTab(toIndex: toIndex)   

        return true
      }

 func animateToTab(toIndex: Int) {
        guard let tabViewControllers = viewControllers,
            let selectedVC = selectedViewController else { return }



        guard let fromView = selectedVC.view,
            let toView = tabViewControllers[toIndex].view,
            let fromIndex = tabViewControllers.firstIndex(of: selectedVC),
            fromIndex != toIndex else { return }



        // Add the toView to the tab bar view
        fromView.superview?.addSubview(toView)

        // Position toView off screen (to the left/right of fromView)
        let screenWidth = UIScreen.main.bounds.size.width
        let scrollRight = toIndex > fromIndex
        let offset = (scrollRight ? screenWidth : -screenWidth)
        toView.center = CGPoint(x: fromView.center.x + offset, y: toView.center.y)

        // Disable interaction during animation
        view.isUserInteractionEnabled = false

        UIView.animate(withDuration: 0.3,
                       delay: 0.0,
                       usingSpringWithDamping: 1,
                       initialSpringVelocity: 0,
                       options: .curveEaseOut,
                       animations: {
                        // Slide the views by -offset
                        fromView.center = CGPoint(x: fromView.center.x - offset, y: fromView.center.y)
                        toView.center = CGPoint(x: toView.center.x - offset, y: toView.center.y)

        }, completion: { finished in
            // Remove the old view from the tabbar view.
            fromView.removeFromSuperview()
            self.selectedIndex = toIndex
            self.view.isUserInteractionEnabled = true
        })
    }

当过渡发生时,控制器的顶部栏颜色会发生变化,并会导致令人讨厌的闪光效果。

请看视频

https://drive.google.com/file/d/15mlR9NfV_1C8gwi-4vfpV4CxpXbG5BUm/view

我怎样才能防止这种情况发生?

【问题讨论】:

  • 你用什么做顶栏?它是一个导航栏还是别的什么?半透明属性是启用还是禁用?
  • @MihaiErős 导航栏样式为黑色半透明
  • 禁用半透明并尝试一下,让我知道它是怎么回事。
  • 但是对于这个项目来说,半透明的外观是必须的。有没有什么办法可以让它在不禁用半透明的情况下正常工作?
  • 嗯,所以你想要一个带有那种 alpha 的黑色导航栏,对吧?但没有半透明带来的故障。

标签: swift animation uitabbarcontroller


【解决方案1】:

我通过禁用半透明导航栏来修复它

【讨论】:

    猜你喜欢
    • 1970-01-01
    • 1970-01-01
    • 2011-05-05
    • 1970-01-01
    • 2016-12-15
    • 1970-01-01
    • 2014-04-25
    • 2013-11-12
    • 1970-01-01
    相关资源
    最近更新 更多