UITableView上下轮播

思路借鉴demo，我索性改造成了swift版本的。
https://github.com/login?return_to=%2Fzhouxubin%2FXBLoopLabel

具体调用代码:

class ThirdVC: UIViewController {
    
    var dataSouece : [String] = ["111","3333","dasd"]
    
    var loopV : TextLoopV!
    
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        
        loopV = TextLoopV.textLoopView(with: dataSouece, loopInterval: 3.0, initWithFrame: CGRect.init(x: 0, y: 100, width: 300, height: 100)) { (a, ind) in
            prints(a,ind)
        }
        
        view.addSubview(loopV)
    }
}

实现代码：

class TextLoopV: UIView,UITableViewDelegate,UITableViewDataSource {
    
    /// 定义闭包
    typealias sendValueClosure = (_ sendString: String,_ index : Int) -> Void//声明
    
    /// 回调
    var callBackString: sendValueClosure?//持有
    
    /// 数据源
    var dataSource : [String] = [String]()
    
    /// 表格
    var tableView : UITableView!
    
    /// 累加索引
    var currentRowIndex : Int = 0
    
    /// 自动几秒时间
    var interval : TimeInterval {
        
        get {
            return 1.0
        }
        set {

            let timer = Timer.scheduledTimer(timeInterval: interval, target: self, selector: #selector(timerStuff), userInfo: nil, repeats: true)
            self.timer = timer
        }
    }
    
    var timer : Timer!
    
    /// 定时器做的事
    @objc private func timerStuff() {
        prints(self.currentRowIndex)
        self.currentRowIndex += 1
        self.tableView.setContentOffset(CGPoint.init(x: 0, y: CGFloat(self.currentRowIndex) * self.tableView.rowHeight), animated: true)
    }
    
    

    /// 初始化上下滚动的视图
    ///
    /// - Parameters:
    ///   - dataSource: 数据源
    ///   - timeInterval: 时间间隔
    ///   - frame: 容器大小
    ///   - selectBlock: 传回的闭包
    /// - Returns: 返回本身
    class func textLoopView(with dataSource: [String], loopInterval timeInterval: TimeInterval, initWithFrame frame: CGRect, select selectBlock: @escaping sendValueClosure) -> TextLoopV {
        let loopV = TextLoopV.init(frame: frame)
        loopV.dataSource = dataSource
        loopV.interval = timeInterval
        loopV.callBackString = selectBlock
        return loopV
    }
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        self.tableView = UITableView.init(frame: CGRect.init(x: 0, y: 0, width: frame.width, height: frame.height))
        self.tableView.delegate = self
        self.tableView.dataSource = self
        self.tableView.separatorStyle = .none
        self.tableView.layer.borderWidth = 1
        self.tableView.rowHeight = frame.height
        self.tableView.zdx_register(TextLoopCell.classForCoder())
        self.addSubview(self.tableView)
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    
    //MARK:scrollView代理
    func scrollViewDidEndScrollingAnimation(_ scrollView: UIScrollView) {
        if self.currentRowIndex == self.dataSource.count {
            self.currentRowIndex = 0
            self.tableView.setContentOffset(CGPoint.zero, animated: false)
        }
    }
    
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        tableView.deselectRow(at: indexPath, animated: true)
        
        if self.callBackString != nil {
            self.callBackString!(self.dataSource[indexPath.row],indexPath.row)
        }
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.zdx_dequeueReusableCell(indexPath: indexPath) as TextLoopCell
        cell.ddd.text = self.dataSource[indexPath.row]
        return cell
    }
    
    func numberOfSections(in tableView: UITableView) -> Int {
        return 2
    }
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return self.dataSource.count
    }
}

自定义的表格单元格cell:

class TextLoopCell: CommonTableViewCell {
    
    var ddd : UILabel!
    
    var baseIMg : BaseUIImageView!
    
    override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: .default, reuseIdentifier: reuseIdentifier)
        
        ddd = UILabel.init(frame: frame)
        baseIMg = BaseUIImageView.init(CGRect.init(x: frame.midX, y: frame.midY, width: frame.width / 2, height: frame.height / 2), #imageLiteral(resourceName: "default"))
        contentView.addSubview(ddd)
        contentView.addSubview(baseIMg)
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

1.有几个注意点：oc 定义变量后，会默认持有setter和getter方法。
swift对应的是set 、get。
https://www.jianshu.com/p/87fc570e44df

2.再则，就是swift中闭包的定义注意。
https://www.jianshu.com/p/5a3fd872257e