如何自定义在故事板上添加的tabbar项目

Question

我制作了UITabbar控制器并在Storyboard上制作了5个tabbar按钮。

但我无法控制标签栏项目中的图像大小和颜色。 我想使用PNG文件自定义按钮颜色和形状，而不是使用默认颜色。

但下面的代码是不工作的，除了tabbar tintcolor。

class MainView: UITabBarController { 

override func viewDidLoad() { 
    super.viewDidLoad() 

    tabBar.barTintColor = UIColor.white 

} 

override func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) { 
    switch item.tag{ 
    case 0: 
     print(item.tag) 
     UITabBar.setItems(item[0]) = UITabBarItem(title: "Magzine", image: UIImage(named: "exhibiter.png"), selectedImage: UIImage(named: "exhibiterselected.png")) 
    case 1: 
     print("") 
    case 2: 
     print("") 
    case 3: 
     print("") 
    case 4: 
     print("") 
    default: 
     break 
    } 
} 

override func viewWillAppear(_ animated: Bool) { 
    UIApplication.shared.isStatusBarHidden = false 
} 

override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
} 

}

Answer 1

你可以使用这样

class TabBarViewController: UITabBarController { 

    required init(coder aDecoder: NSCoder) { 

    super.init(coder: aDecoder)! 

override func viewDidLoad() { 
    super.viewDidLoad() 

    UITabBar.appearance().tintColor = UIColor(red: 254/255.0, green: 105/255.0, blue: 51/255.0, alpha: 100.0) 

    for i in 0 ..< self.tabBar.items!.count { 

     switch i { 

     case 0: 

      tabBar.items?[0].title = "Home" 
      let firstTab = self.tabBar.items![i] as UITabBarItem 
      learnTab.image = UIImage(named: "Homedeselected")!.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal) 
      firstTab.selectedImage = UIImage(named: "Homedeselected")!.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal) 
      firstTab.imageInsets = UIEdgeInsetsMake(-1, 0, 1, 0) 
      firstTab.titlePositionAdjustment = UIOffsetMake(0, -4) 


     case 1: 

      tabBar.items?[1].title = "Request" 
      let secondTab = self.tabBar.items![i] as UITabBarItem 
      secondTab.image = UIImage(named: "RequestDeselected")!.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal) 
      secondTab.selectedImage = UIImage(named: "Requestselected")!.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal) 
      secondTab.imageInsets = UIEdgeInsetsMake(-1, 0, 1, 0) 
      secondTab.titlePositionAdjustment = UIOffsetMake(0, -4) 

     case 2: 

      tabBar.items?[2].title = "Renew" 
      let thirdTab = self.tabBar.items![i] as UITabBarItem 
      thirdTab.image = UIImage(named: "RenewDeSelected")!.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal) 
      thirdTab.selectedImage = UIImage(named: "RenewSelected")!.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal) 
      thirdTab.imageInsets = UIEdgeInsetsMake(-1, 0, 1, 0) 
      thirdTab.titlePositionAdjustment = UIOffsetMake(0, -4) 

     case 3: 

      tabBar.items?[3].title = "ReSell" 
      let forthTab = self.tabBar.items![i] as UITabBarItem 
      forthTab.image = UIImage(named: "ReSellDeSelected")!.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal) 
      forthTab.selectedImage = UIImage(named: "ReSellSelected")!.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal) 
      forthTab.imageInsets = UIEdgeInsetsMake(-1, 0, 1, 0) 
      forthTab.titlePositionAdjustment = UIOffsetMake(0, -4) 

     case 4: 

      tabBar.items?[4].title = "ReCycle" 
      let fifthTab = self.tabBar.items![i] as UITabBarItem 
      fifthTab.image = UIImage(named: "ReCycleDeSelected")!.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal) 
      fifthTab.selectedImage = UIImage(named: "ReCycleSelected")!.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal) 
      fifthTab.imageInsets = UIEdgeInsetsMake(-2, 0, 2, 0) 
      fifthTab.titlePositionAdjustment = UIOffsetMake(0, -5) 

     default: 
      break 
     } 
    } 
} 

override func tabBar(tabBar: UITabBar, didSelectItem item: UITabBarItem) { 




    } 

}