1,下面的样例是给表格UITableView添加编辑功能:
(1)给表格添加长按功能,长按后表格进入编辑状态
(2)在编辑状态下,第一个分组处于删除状态,第二个分组处于插入状态
(3)点击删除图标,删除对应条目
(4)点击添加图标,插入一条新数据
import UIKit
class ViewController: UIViewController ,UITableViewDelegate, UITableViewDataSource, UIGestureRecognizerDelegate {
var tableView:UITableView!
var allNames:Dictionary<Int, [String]>!
var addHeaders:[String]!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
allNames =
[
0:[String](["UILabel 标签", "UITextField 文本框", "UIButton 按钮"]),
1:[String](["UIDatePiker 日期选择器", "TableView 表格视图", "UIToolbar 工具条", "UIWebView 浏览器"])
]
print(allNames)
addHeaders = ["常见 UIKit 控件","高级 UIKit 控件"]
// 创建表格
tableView = UITableView.init(frame: self.view.frame, style: UITableViewStyle.grouped)
tableView.delegate = self
tableView.dataSource = self
self.view .addSubview(tableView)
// 注册cell
tableView .register(UITableViewCell.self, forCellReuseIdentifier: "cell")
// 创建表头标签
let headerLabel = UILabel.init(frame: CGRect(x:0, y:20, width:375, height:30))
headerLabel.backgroundColor = UIColor.yellow
headerLabel.textColor = UIColor.red
headerLabel.numberOfLines = 0
headerLabel.lineBreakMode = .byWordWrapping
headerLabel.text = "高级 UIKit"
headerLabel.textAlignment = NSTextAlignment.center
headerLabel.font = UIFont.systemFont(ofSize: 15)
tableView.tableHeaderView = headerLabel
let longPress = UILongPressGestureRecognizer.init(target: self, action: #selector(longPressAction))
longPress.delegate = self
longPress.minimumPressDuration = 1
tableView .addGestureRecognizer(longPress)
}
func longPressAction(recognizer:UILongPressGestureRecognizer) {
if recognizer.state == UIGestureRecognizerState.began {
print("UIGestureRecognizerStateBegan");
}
if recognizer.state == UIGestureRecognizerState.changed {
print("UIGestureRecognizerStateChanged");
}
if recognizer.state == UIGestureRecognizerState.ended {
print("UIGestureRecognizerStateEnded");
if tableView.isEditing == true {
tableView.isEditing = false
}
else
{
tableView.isEditing = true
}
}
}
// 创建分区
func numberOfSections(in tableView: UITableView) -> Int {
return allNames.count
}
// 每个分区的行数
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return allNames[section]!.count
}
// 分区头部显示
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return addHeaders[section]
}
// 分区尾部显示
func tableView(_ tableView: UITableView, titleForFooterInSection section: Int) -> String? {
let data = allNames[section]
return "有\(data!.count)个控件"
}
// 显示cell内容
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let identify = "cell"
let secno = indexPath.section
let data = allNames[secno]
var cell = UITableViewCell()
cell = UITableViewCell.init(style: UITableViewCellStyle.subtitle, reuseIdentifier: identify)
if secno == 0 {
cell.accessoryType = .disclosureIndicator
cell.textLabel?.text = data?[indexPath.row]
cell.imageView?.image = UIImage(named:"bug")
}
else
{
cell.textLabel?.text = data?[indexPath.row]
cell.detailTextLabel?.text = "\(data![indexPath.row])的详解"
}
return cell
}
// cell的选中事件
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
// 确定该分组的内容
let str = allNames[indexPath.section]?[indexPath.row]
print("str\(str)")
}
// 设置单元格的编辑的样式
func tableView(_ tableView: UITableView, editingStyleForRowAt indexPath: IndexPath) -> UITableViewCellEditingStyle {
if indexPath.section == 0 {
return UITableViewCellEditingStyle.insert
}
else
{
return UITableViewCellEditingStyle.delete
}
}
// 设置确认删除按钮的文字
func tableView(_ tableView: UITableView, titleForDeleteConfirmationButtonForRowAt indexPath: IndexPath) -> String? {
return "确认删除"
}
// 单元格编辑后的响应方法
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == UITableViewCellEditingStyle.delete {
self.allNames[indexPath.section]?.remove(at: indexPath.row)
tableView.setEditing(false, animated: true)
}
else if editingStyle == UITableViewCellEditingStyle.insert
{
allNames[indexPath.section]?.insert("插入的", at: indexPath.row)
tableView.setEditing(false, animated: true)
}
tableView.reloadData()
}
}
功能改进
(1)默认情况下所有单元格都无法进行滑动删除等编辑操作。
(2)长按表格进入编辑状态,所有单元格都可以进行删除操作。
(3)同时在编辑状态下,在下方会自动出现一个新增操作单元格。点击前面的加号,便会给数据集中添加一条新数据。
import UIKit
class ViewController: UIViewController ,UITableViewDelegate, UITableViewDataSource, UIGestureRecognizerDelegate {
var tableView:UITableView!
var allNames:Dictionary<Int, [String]>!
var addHeaders:[String]!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
allNames =
[
0:[String](["UILabel 标签", "UITextField 文本框", "UIButton 按钮"]),
1:[String](["UIDatePiker 日期选择器", "TableView 表格视图", "UIToolbar 工具条", "UIWebView 浏览器"])
]
print(allNames)
addHeaders = ["常见 UIKit 控件","高级 UIKit 控件"]
// 创建表格
tableView = UITableView.init(frame: self.view.frame, style: UITableViewStyle.grouped)
tableView.delegate = self
tableView.dataSource = self
self.view .addSubview(tableView)
// 注册cell
tableView .register(UITableViewCell.self, forCellReuseIdentifier: "cell")
// 创建表头标签
let headerLabel = UILabel.init(frame: CGRect(x:0, y:20, width:375, height:30))
headerLabel.backgroundColor = UIColor.yellow
headerLabel.textColor = UIColor.red
headerLabel.numberOfLines = 0
headerLabel.lineBreakMode = .byWordWrapping
headerLabel.text = "高级 UIKit"
headerLabel.textAlignment = NSTextAlignment.center
headerLabel.font = UIFont.systemFont(ofSize: 15)
tableView.tableHeaderView = headerLabel
let longPress = UILongPressGestureRecognizer.init(target: self, action: #selector(longPressAction))
longPress.delegate = self
longPress.minimumPressDuration = 1
tableView .addGestureRecognizer(longPress)
}
func longPressAction(recognizer:UILongPressGestureRecognizer) {
if recognizer.state == UIGestureRecognizerState.began {
print("UIGestureRecognizerStateBegan");
}
if recognizer.state == UIGestureRecognizerState.changed {
print("UIGestureRecognizerStateChanged");
}
if recognizer.state == UIGestureRecognizerState.ended {
print("UIGestureRecognizerStateEnded");
if tableView.isEditing == true {
tableView.isEditing = false
}
else
{
tableView.isEditing = true
}
tableView.reloadData()
}
}
// 创建分区
func numberOfSections(in tableView: UITableView) -> Int {
return allNames.count
}
// 每个分区的行数
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
var count = allNames[section]!.count
if tableView.isEditing {
count += 1
}
return count
}
// 分区头部显示
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return addHeaders[section]
}
// 分区尾部显示
func tableView(_ tableView: UITableView, titleForFooterInSection section: Int) -> String? {
let data = allNames[section]
return "有\(data!.count)个控件"
}
// 显示cell内容
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let identify = "cell"
let secno = indexPath.section
let data = allNames[secno]
var cell = UITableViewCell()
if secno == 0 {
cell = UITableViewCell.init(style: UITableViewCellStyle.subtitle, reuseIdentifier: identify)
if tableView.isEditing && indexPath.row == data?.count {
cell.textLabel?.text = "添加新数据..."
}
else
{
cell.accessoryType = .disclosureIndicator
cell.textLabel?.text = data?[indexPath.row]
cell.imageView?.image = UIImage(named:"bug")
}
}
else if secno == 1
{
cell = UITableViewCell.init(style: UITableViewCellStyle.subtitle, reuseIdentifier: identify)
if tableView.isEditing && indexPath.row == data?.count {
cell.textLabel?.text = "添加新数据..."
}
else
{
cell.textLabel?.text = data?[indexPath.row]
cell.detailTextLabel?.text = "\(data![indexPath.row])的详解"
}
}
return cell
}
// cell的选中事件
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
// 确定该分组的内容
let str = allNames[indexPath.section]?[indexPath.row]
print("str\(str)")
}
// 设置单元格的编辑的样式
func tableView(_ tableView: UITableView, editingStyleForRowAt indexPath: IndexPath) -> UITableViewCellEditingStyle {
if indexPath.section == 0 {
if tableView.isEditing == false {
return UITableViewCellEditingStyle.none
}
else if indexPath.row == allNames[indexPath.section]?.count {
return UITableViewCellEditingStyle.insert
}else {
return UITableViewCellEditingStyle.delete
}
}
else
{
if tableView.isEditing == false {
return UITableViewCellEditingStyle.none
}
else if indexPath.row == allNames[indexPath.section]?.count {
return UITableViewCellEditingStyle.insert
}else {
return UITableViewCellEditingStyle.delete
}
}
}
// 设置确认删除按钮的文字
func tableView(_ tableView: UITableView, titleForDeleteConfirmationButtonForRowAt indexPath: IndexPath) -> String? {
return "确认删除"
}
// 单元格编辑后的响应方法
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == UITableViewCellEditingStyle.delete {
self.allNames[indexPath.section]?.remove(at: indexPath.row)
}
else if editingStyle == UITableViewCellEditingStyle.insert
{
allNames[indexPath.section]?.insert("插入的", at: indexPath.row)
}
tableView.reloadData()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}