Swift自定义iOS中的TabBarController并为其添加动画

直接上代码：

 

复制代码

 

// 用来记录当前选中按钮
private var currentSelectedButton = UIButton()
// 用来指示选中的背景
private var selectionIndicatorImageView: UIImageView!
// 单个item的宽度
private var itemWidth: CGFloat!
在viewDidLoad()方法中加入以下代码：

override func viewDidLoad() {
    super.viewDidLoad()

    // 记录TabBarController自带TabBar的位置
    let rect = self.tabBar.frame
    // 移除TabBarController自带的TabBar
    self.tabBar.removeFromSuperview()

    // 自定义TabBar的背景
    let backgroundView = UIView(frame: rect)
    backgroundView.backgroundColor = UIColor(patternImage: UIImage(named: "TabBarBG")!)

    self.view.addSubview(backgroundView)

    itemWidth = backgroundView.frame.size.width / CGFloat(self.viewControllers!.count)

    selectionIndicatorImageView = UIImageView(frame: CGRectMake(0, 0, itemWidth, backgroundView.frame.size.height))
    selectionIndicatorImageView.image = UIImage(named: "TabBarBGSel")

    backgroundView.addSubview(selectionIndicatorImageView)

    for var i = 0; i < viewControllers!.count; i++ {

        let button = CGMTabBarButton(frame: CGRectMake(itemWidth * CGFloat(i), 0, itemWidth, backgroundView.frame.size.height))

        let image = UIImage(named: "TabBar(i)")!
        let selImage = UIImage(named: "TabBar(i)Sel")!

        button.setImage(image, forState: UIControlState.Normal)
        button.setImage(selImage, forState: UIControlState.Selected)

        button.addTarget(self, action: "onClick:", forControlEvents: UIControlEvents.TouchUpInside)

        button.tag = i