问题
I am working on an app in which requirement is to create a hamburger menu with submenu in it like
I tried different method using table inside table view cell etc but unable to create this menu. if someone has a solution then recommend me
回答1:
You can create such an item structure as your data source
struct Item {
let text: String
var subItems: [String]?
var isExpanded = false
init(_ text: String, items: [String]? = nil) {
self.text = text
self.subItems = items
}
}
Usage
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
}
}
}
回答2:
You should separate the process.
First, create the hamburger menu: for this, I recommend using this 3rd party library: https://github.com/John-Lluch/SWRevealViewController With the help of this, it is very easy to create a side out menu from the left side of the screen. The best thing that you will get a ViewController which will responsible for the menu, so you can easily customize it.
Second, as mentioned below, you should use a tableView with expandable cells. The best way to do this is to basically just show the headers of the cells. If the user taps on a header, then show the actual cell. (rowheight > 0). There is a tutorial about this: https://www.youtube.com/watch?v=bSKUYRsMCrM
回答3:
-> you can create a sliding drawer menu(hamburger menu) using any of the following libraries:
1) REFrostedViewController
2) SWRevealViewController or any other
-> Sub Menu: In the drawer view controller, you have to add a table view and implement expandable/collapsible sections to display a submenu. You can follow any tutorial explaining about expand-collapse table view sections. Some of the tutorial links are below:
https://github.com/jeantimex/ios-swift-collapsible-table-section
https://medium.com/@legonaftik/uitableview-with-collapsible-sections-927d726b985c
回答4:
1st Follow https://github.com/jonkykong/SideMenu.
And then to make EXPANDABLE Cells:-
You just need to create 2 Cells in UITableView(In Storyboard). First cell for those who are not expandable and Second cell for the expandable.
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
}
}
}
来源：https://stackoverflow.com/questions/55848062/how-can-i-create-a-hamburger-menu-with-sub-menu-inside