上节已经把tableview成功的在uitextview的下面显示出来了。
现在需要给这个tableview添加点击DataSource和DataDelegate
先定义一个协议,用于外部ViewController传入数据和获取点击事件,函数作用顾名思义。
public protocol DropDownTextFiledDataSourceDelegate:NSObjectProtocol{ func dropDownTextField(dropDownTextField:DropDownTextField,numberOfRowsInSection section:Int)->Int func dropDownTextField(dropDownTextField:DropDownTextField,cellForRowAtIndexPath indexPath: NSIndexPath)-> UITableViewCell func dropDownTextField(dropDownTextField:DropDownTextField,didSelectRowAtIndexPath indexPath: NSIndexPath) }
在UITextField的tableview代理函数中调用外部传入的该代理实例。
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中实现自定义的协议,并且将ViewController自身传递给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 = 0 return cell! } func dropDownTextField(dropdownTextField: DropDownTextField, didSelectRowAtIndexPath indexPath: NSIndexPath) { resultLabel.text = "\(indexPath.row)" } }
至此,ui和数据操作都完成了
时间: 2024-11-05 10:34:38