我正在尝试扩展我的UITableViewCell，我可以扩展单元格。但我想要删除未选中的UITableViewCell。
我在代码中尝试的是什么：
var expandedCells = [Int]()
@IBOutlet weak var tableVieww:UITableView!
@IBAction func buttonPressed(_ sender: AnyObject) {
// If the array contains the button that was pressed, then remove that button from the array
if expandedCells.contains(sender.tag) {
expandedCells = expandedCells.filter({ $0 != sender.tag})
}
// Otherwise, add the button to the array
else {
expandedCells.append(sender.tag)
}
// Reload the tableView data anytime a button is pressed
tableVieww.reloadData()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 20
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! exampleCell
cell.myButton.tag = indexPath.row
return cell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
// Set the row height based on whether or not the Int associated with that row is contained in the expandedCells array
if expandedCells.contains(indexPath.row) {
return 212
} else {
return 57
}
}
答案 0 :(得分：1)
您可以维护一个变量来维护所选索引，如下所示
var expandedIndexPath: IndexPath?
然后按如下所示更新tableView委托，
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
expandedIndexPath = indexPath // Update the expandedIndexPath with the selected index
tableView.reloadData() // Reload tableview to reflect the change
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
// Check wether expanded indexpath is the current index path and updated return the respective height
if expandedIndexPath == indexPath {
return 212
} else {
return 57
}
}
这应该可以正常工作。
答案 1 :(得分：1)
1）首先创建Bool数组变量
var isExpandArr = Array<Bool>()
2）在ViewLoad（）
中的0索引处插入trueisExpandArr.insert(true, at: 0)
3）放入cellForRowAt
cell.ToggleBT.addTarget(self, action: #selector(handleToggleBtn), for:.touchUpInside)
cell.ToggleBT.tag = indexPath.row
if isExpandArr[indexPath.row] == true{
cell.bottomrView.isHidden = false
}else{
cell.bottomrView.isHidden = true
}
4）设置heightForRowAt
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return isExpandArr[indexPath.row] ? 204 : 60
}
5）放功能
func handleToggleBtn(sender: UIButton){
print(sender.tag)
if isExpandArr.contains(true){
print("yes")
if let unwrappedIndex = isExpandArr.index(of: true){
isExpandArr[unwrappedIndex] = false
isExpandArr[sender.tag] = true
}
}
table.reloadData()
}
答案 2 :(得分：0)
在#swift 2.3中 希望这也会有所帮助 折叠并展开标题
在viewDidLoad之上或在类块
中定义变量var headerIcon: UIImageView = UIImageView()
var sectionTitleArray : NSMutableArray = NSMutableArray()
var sectionContentEventTitleDict : NSMutableDictionary = NSMutableDictionary()
var sectionEventImagesDict : NSMutableDictionary = NSMutableDictionary()
var arrayForBool : NSMutableArray = NSMutableArray()
var arrFirstSectionItemTitle = ["Section 1 item Name 1","Section 1 item Name 2","Section 1 item Name 3","Section 1 item Name 4","Section 1 item Name 5","Section 1 item Name 6","Section 1 item Name 7"]
var arrFirstSectionItemImages = ["Section_1_icon_1","Section_1_icon_2","Section_1_icon_3","Section_1_icon_4","Section_1_icon_5","Section_1_icon_6","Section_1_icon_7"]
var arrSecondSectionItemTitle = ["Section 2 item Name 1","Section 2 item Name 2","Section 2 item Name 3","Section 2 item Name 4"]
var arrSecondSectionItemImages = ["Section_1_icon_1","Section_2_item_icon_2","Section_2_item_icon_3","Section_1_item_icon_4","Section_1_item_icon_5","Section_1_item_icon_6","Section_1_item_icon_7"]
var arrData: Array<Dictionary<String,AnyObject>> = Array<Dictionary<String,AnyObject>>()
@IBOutlet weak var tableList: UITableView!
在viewDidLoad（）方法中编写这些代码行
tableList.delegate = self
tableList.dataSource = self
tableList.backgroundColor = UIColor.getRGBColor(240, g: 240, b: 240)
let customView = UIView(frame: CGRectMake(0, 0, 200, 80))
customView.backgroundColor = UIColor.getRGBColor(240, g: 240, b: 240)
let customLine = UIView(frame: CGRectMake(0, 0, tblAllQuestion.frame.size.width, 1))
customLine.backgroundColor = UIColor.getRGBColor(240, g: 240, b: 240)
customView.addSubview(customLine)
tableList.tableFooterView = customView
现在编写委托和数据源方法如下： // MARK：UITableViewDelegate AND UITableViewDataSource METHOD WITH SECTION
要折叠和展开的部分数量
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
print_debug(sectionTitleArray.count)
return sectionTitleArray.count
}
细胞方法：
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("CELL_IDENTIFIER", forIndexPath: indexPath)as! CellAllQuestionFiqhVC
//let cellIdentifier = "CellAllQuestionFiqhVC"
// cell = self.tableList.dequeueReusableCellWithIdentifier(cellIdentifier)
let manyCells : Bool = arrayForBool .objectAtIndex(indexPath.section).boolValue
if (!manyCells) {
// cell.textLabel.text = @"click to enlarge";
}
else{
let group = self.arrData[indexPath.section]
let data: Array<Dictionary<String,AnyObject>> = group["data"]as! Array<Dictionary<String,AnyObject>>
cell.configCell(data[indexPath.row], instance: self)
}
return cell
}
部分中的数字单元格：
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if(arrayForBool.objectAtIndex(section).boolValue == true){
let count1 = arrData[section]["data"]!
if count1.count != nil {
return count1.count
}
}
return 0;
}
部分的高度
func tableView(tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return 40
}
细胞的高度：
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
if(arrayForBool.objectAtIndex(indexPath.section).boolValue == true){
return 100
}
return 2;
}
设置标头tappable：
func tableView(tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let headerView = UIView(frame: CGRectMake(0, 0, tableView.frame.size.width, 40))
headerView.backgroundColor = UIColor.whiteColor()//Constant.kAPP_COLOR
headerView.tag = section
let headerString = UILabel(frame: CGRectMake(40/*tableView.frame.size.width/2-30*/, 10, tableView.frame.size.width, 18))
let headerLine = UIView(frame: CGRectMake(0, 39, tableView.frame.size.width, 1))
//UILabel(frame: CGRect(x: 20, y: 10, width: tableView.frame.size.width-10, height: 30)) as UILabel
//headerLine.text = sectionTitleArray.objectAtIndex(section) as? String
headerLine.backgroundColor = UIColor.getRGBColor(240, g: 240, b: 240)
headerView .addSubview(headerLine)
headerIcon = UIImageView(frame: CGRect(x: tblAllQuestion.bounds.maxX-30, y: 10, width: 8, height: 12)) as UIImageView
headerIcon.image = UIImage(named: "right_arrow")
headerView.addSubview(headerIcon)
let headerTapped = UITapGestureRecognizer(target: self, action: #selector(sectionHeaderTapped))
headerView.addGestureRecognizer(headerTapped)
return headerView
}
点击旋转部分图标：
func rotateSectionIconOnTapped(indexTapped: Int) {
isActiveMap = false
if arrayForBool.objectAtIndex(indexTapped) as! NSObject == true {
print("toggle the icon at degree 90")
headerIcon.transform = CGAffineTransformMakeRotation(CGFloat(M_PI_2))
}
else if arrayForBool.objectAtIndex(indexTapped) as! NSObject == false {
print("toggle the ico at degree 0")
headerIcon.transform = CGAffineTransformMakeRotation(0)
}
}
操作：
func sectionHeaderTapped(recognizer: UITapGestureRecognizer) {
//filterByCategoryIsOn = false
print("Tapping working")
print(recognizer.view?.tag)
//if recognizer.view!.tag != 2 {
let indexPath : NSIndexPath = NSIndexPath(forRow: 0, inSection:(recognizer.view?.tag as Int!)!)
if (indexPath.row == 0) {
for (indexx, bl) in arrayForBool.enumerate() {
if recognizer.view!.tag != indexx {
let index : NSIndexPath = NSIndexPath(forRow: 0, inSection:(indexx))
arrayForBool.replaceObjectAtIndex(index.section, withObject: false)
let range = NSMakeRange(index.section, 1)
let sectionToReload = NSIndexSet(indexesInRange: range)
self.tableList.reloadSections(sectionToReload, withRowAnimation:UITableViewRowAnimation.Fade)
}
}
var collapsed = arrayForBool.objectAtIndex(indexPath.section).boolValue
print_debug(collapsed)
collapsed = !collapsed;
print_debug(collapsed)
arrayForBool.replaceObjectAtIndex(indexPath.section, withObject: collapsed)
print(arrayForBool)
//reload specific section animated
let range = NSMakeRange(indexPath.section, 1)
let sectionToReload = NSIndexSet(indexesInRange: range)
self.tableList.reloadSections(sectionToReload, withRowAnimation:UITableViewRowAnimation.Fade)
rotateSectionIconOnTapped(recognizer.view!.tag)
}
}
在索引路径处获取didselect行的操作：
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
print_debug(indexPath)
print_debug(indexPath.row)
print_debug(indexPath.section)
if indexPath.section == 0 {
}
else if indexPath.section == 1 {
}
}