您可以创建这样的项结构作为数据源
struct Item {
let text: String
var subItems: [String]?
var isExpanded = false
init(_ text: String, items: [String]? = nil) {
self.text = text
self.subItems = items
}
}
用法
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
@IBOutlet var tableView: UITableView!
private let imgOpen = UIImage(named: "open")
private let imgClose = UIImage(named: "close")
private var dataSource = [Item]()
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: "groupCell")
self.tableView.dataSource = self
self.tableView.delegate = self
self.dataSource.append(Item("HOME"))
self.dataSource.append(Item("ABOUT US"))
self.dataSource.append(Item("OUR PROJECTS", items: ["Project-1", "Project-2", "..."]))
self.dataSource.append(Item("BAHRIA TOWN PHASE 1 - 7"))
self.dataSource.append(Item("BAHRIA TOWN PHASE 8"))
self.tableView.reloadData()
}
func numberOfSections(in tableView: UITableView) -> Int {
return self.dataSource.count
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
let item = self.dataSource[section]
if item.isExpanded, let count = item.subItems?.count {
return count + 1
}
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let item = self.dataSource[indexPath.section]
let cell = tableView.dequeueReusableCell(withIdentifier: "groupCell", for: indexPath)
var imageView: UIImageView?
if indexPath.row > 0, let text = item.subItems?[indexPath.row - 1] {
cell.textLabel?.text = text
} else {
cell.textLabel?.text = item.text
if item.subItems != nil {
imageView = UIImageView(image: item.isExpanded ? self.imgClose : self.imgOpen)
}
}
cell.accessoryView = imageView
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let item = self.dataSource[indexPath.section]
if indexPath.row == 0 && item.subItems != nil {
self.dataSource[indexPath.section].isExpanded = !item.isExpanded
let indexSet = IndexSet(integer: indexPath.section)
tableView.reloadSections(indexSet, with: .automatic)
} else {
// non-expandable menu item tapped
}
}
}
你应该分开这个过程。
- >您可以使用以下任何库创建滑动抽屉菜单(汉堡菜单):
1) REFrostedViewController
2) SWRevealViewController or any other
- >子菜单:在抽屉视图控制器中,您必须添加表视图并实现可展开/可折叠部分以显示子菜单。您可以按照任何解释有关展开折叠表视图部分的教程进行操作。一些教程链接如下:
https://github.com/jeantimex/ios-swift-collapsible-table-section
https://medium.com/@legonaftik/uitableview-with-collapsible-sections-927d726b985c
第一关注https://github.com/jonkykong/SideMenu
。
然后制作可扩展的单元格: -
你只需要在UITableView
中创建2个单元格(在故事板中)。第一个细胞用于那些不可扩展的细胞和第二个细胞用于可扩展的细胞。
class SideMenuTableViewController: UITableViewController {
// MARK:- Constants And Vars
var isOurProjectCellExpanded = false
}
class SideMenuTableViewController: UITableViewDataSource, UITableViewDelegate {
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "simpleCell", for: indexPath) as! SideMenuBasicTableViewCell
switch indexPath.row {
case 0:
cell.itemName.text = "HOME"
break
case 1:
cell.itemName.text = "About Us"
break
case 2:
if(isOurProjectCellExpanded){
//expandedCell
let cell = tableView.dequeueReusableCell(withIdentifier: "expandedCell", for: indexPath) as! SideMenuBasicTableViewCell
cell.itemName.text = "Our Projects"
return cell
}else{
cell.arrowDownImageView.isHidden = false
cell.itemName.text = "Our Projects"
}
break
case 3:
cell.itemName.text = "Bahria Town phase 1-7"
break
case 4:
cell.itemName.text = "Bahria Town phase 8"
break
default:
break
}
return cell
}
//And in `DidSelectRow` Method
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if(indexPath.row == 2){
if(isOurProjectCellExpanded){
isOurProjectCellExpanded = false
tableView.reloadRows(at: [indexPath], with: .none)
}else{
isOurProjectCellExpanded = true
tableView.reloadRows(at: [indexPath], with: .none)
}
}else if(indexPath.row == 0){
// Handle it yourself
}else if(indexPath.row == 1){
// Handle it yourself
}else if(indexPath.row == 3){
// Handle it yourself
}else if(indexPath.row == 4){
// Handle it yourself
}
}
}