上節已經把tableview成功的在uitextview的下面顯示出來了。

現在需要給這個tableview添加點擊DataSource和DataDelegate

先定義一個協議，用于外部ViewController傳入數據和獲取點擊事件，函數作用顧名思義。

public protocol DropDownTextFiledDataSourceDelegate:NSObjectProtocol{func dropDownTextField(dropDownTextField:DropDownTextField,numberOfRowsInSection section:Int)->Intfunc dropDownTextField(dropDownTextField:DropDownTextField,cellForRowAtIndexPath indexPath: NSIndexPath)-> UITableViewCellfunc dropDownTextField(dropDownTextField:DropDownTextField,didSelectRowAtIndexPath indexPath: NSIndexPath) }

在UITextField的tableview代理函數中調用外部傳入的該代理實例。

public weak var dataSourceDelegate: ZTDropDownTextFieldDataSourceDelegate?extension DropDownTextField:UITableViewDataSource,UITableViewDelegate{@available(iOS 2.0, *)public func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int{if let dataSourceDelegate = dataSourceDelegate {if dataSourceDelegate.respondsToSelector(Selector("dropDownTextField:numberOfRowsInSection:")) {return dataSourceDelegate.dropDownTextField(self, numberOfRowsInSection: section)}}return 0}// Row display. Implementers should *always* try to reuse cells by setting each cell's reuseIdentifier and querying for available reusable cells with dequeueReusableCellWithIdentifier:// Cell gets various attributes set automatically based on table (separators) and data source (accessory views, editing controls)@available(iOS 2.0, *)public func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{if let dataSourceDelegate = dataSourceDelegate {if dataSourceDelegate.respondsToSelector(Selector("dropDownTextField:cellForRowAtIndexPath:")) {return dataSourceDelegate.dropDownTextField(self, cellForRowAtIndexPath: indexPath)}}return UITableViewCell()}public func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath){if let dataSourceDelegate = dataSourceDelegate {if dataSourceDelegate.respondsToSelector(Selector("dropDownTextField:didSelectRowAtIndexPath:")) {dataSourceDelegate.dropDownTextField(self, didSelectRowAtIndexPath: indexPath)}}

? ? ? ? ? ? ? self.dropTable.hidden = true?

}}

　　

在外部ViewController中實現自定義的協議，并且將ViewController自身傳遞給DropDownTextFiled。

dropTextField.dataSourceDelegate = self extension ViewController: DropDownTextFiledDataSourceDelegate {func dropDownTextField(dropDownTextField: DropDownTextField, numberOfRowsInSection section: Int) -> Int {return 5}func dropDownTextField(dropDownTextField: DropDownTextField, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {let reuseIdentifier = "dropdownCell"var cell: UITableViewCell? = dropDownTextField.dropTable.dequeueReusableCellWithIdentifier(reuseIdentifier)if cell == nil {cell = UITableViewCell(style: .Default, reuseIdentifier: reuseIdentifier)}cell!.textLabel!.text = "hello"cell!.textLabel?.numberOfLines = 0return cell!}func dropDownTextField(dropdownTextField: DropDownTextField, didSelectRowAtIndexPath indexPath: NSIndexPath) {resultLabel.text = "\(indexPath.row)"} }

　　至此，ui和數據操作都完成了

?

轉載于:https://www.cnblogs.com/mogul/p/5157699.html

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