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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
自定义带DropDownTable的TextField（事件）
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原文地址：http://www.cnblogs.com/mogul/p/5157699.html
