tableView底部视图

视图的大小自己调整,代码只是展示一种思路,细节自己把握

 //底部标识View
        let tipView = JKWorkBottomCell.createView()
        self.footerView = tipView
        tipView.frame = CGRect.init(x: 0, y: (SCREEN_HEIGHT - kNavBarHeight - 100 + 10), width: SCREEN_WIDTH, height: 100)
        tableView.addSubview(tipView)
        tableView.addObserver(self, forKeyPath: "contentSize", options: .new, context: nil)

  //MARK: 检测contentSize
    override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
           guard let key = keyPath, let value = change?[.newKey] else {
               return
           }
           if key == "contentSize" {
               let tableViewH = self.tableView?.m_height ?? 0
               let contentH = (value as? CGSize)?.height ?? 0
               NSLog("contentSize=\(value)")
               if contentH <= tableViewH {
                   self.footerView?.m_y = (SCREEN_HEIGHT - kNavBarHeight - 100 + 10)
               }
               else {
                   self.footerView?.m_y = (contentH - 10)
               }
           }
       }