问题描述
我有一个标题和一个副标题（在行中选择文本之前，文本不会显示）。我想通过选择子标题项来更改子标题。在示例中，我单击sub1，并且子标题文本更改为sub1
标题和子标题已在viewForHeaderInSection中设置
func tableView(_ tableView: UITableView,viewForHeaderInSection section: Int) -> UIView? {
let headerView = tableView.dequeueReusableheaderfooterView(withIdentifier: "DemoHeaderView") as! DemoHeaderView
headerView.mylabeltitle.text = self.sectionNames[section] as? String
headerView.sublabel.text = "sub heading"
这是代码。
import UIKit
class AddMeditationViewController: UIViewController,UITableViewDelegate,UITableViewDataSource,UITextFieldDelegate,DemoHeaderViewDelegate {
func toggleSelection(header: DemoHeaderView,section: Int) {
var t = 9
}
@IBOutlet weak var tableview: UITableView!
let kHeaderSectionTag: Int = 6900;
var lastSelection: NSIndexPath!
var label = UILabel()
var expandedSectionHeaderNumber: Int = -1
var expandedSectionHeader: UITableViewheaderfooterView!
var sectionItems: Array<Any> = []
var sectionNames: Array<Any> = []
var AVoice: [String] = []
var selectedindexPath: IndexPath!
var gText = ""
var sTime = ""
var name = ""
var aType = ""
override func viewDidLoad() {
super.viewDidLoad()
let headerNib = UINib.init(nibName: "DemoHeaderView",bundle: Bundle.main)
tableview.register(headerNib,forheaderfooterViewReuseIdentifier: "DemoHeaderView")
selectedindexPath = IndexPath(row: -1,section: -1)
sectionNames = [ "heading 1","heading 2","heading 3","heading 4"];
sectionItems = [ ["sub 1","sub 2","sub 3"],["sub 1","sub 2"],"sub 3","sub 4","sub 5","sub 6","sub 7"],[" "]
];
self.tableview!.tableFooterView = UIView()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func numberOfSections(in tableView: UITableView) -> Int {
if sectionNames.count > 0 {
tableView.backgroundView = nil
return sectionNames.count
} else {
}
return 0
}
func tableView(_ tableView: UITableView,numberOfRowsInSection section: Int) -> Int {
if (self.expandedSectionHeaderNumber == section) {
let arrayOfItems = self.sectionItems[section] as! NSArray
return arrayOfItems.count;
} else {
return 0;
}
}
func tableView(_ tableView: UITableView,cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "tableCell",for: indexPath) as UITableViewCell
let section = self.sectionItems[indexPath.section] as! NSArray
//let section2 = self.sectionNames[section] as? String
cell.textLabel?.textColor = UIColor.black
cell.textLabel?.text = section[indexPath.row] as? String
let headerView = tableView.dequeueReusableheaderfooterView(withIdentifier: "DemoHeaderView") as! DemoHeaderView
var headerNumber = self.expandedSectionHeaderNumber
let sectionheading = self.sectionNames[indexPath.section] as? String
if headerNumber == 0 {
var type = section[indexPath.row] as? String
if(type == aType){
cell.accessoryType = .checkmark
} else{
cell.accessoryType = .none
}
}
if headerNumber == 1 {
var voice = section[indexPath.row] as? String
if(voice == gText){
cell.accessoryType = .checkmark
} else{
cell.accessoryType = .none
}
}
if headerNumber == 2 {
var sNow = section[indexPath.row] as? String
if(sNow == sTime){
cell.accessoryType = .checkmark
} else{
cell.accessoryType = .none
}
}
var s = section[indexPath.row] as? String
let myView = UITextField(frame: CGRect(x: 20,y: 0,width: 300,height: 20))
if s == " " {
if(name != ""){
myView.text = name
}else{
myView.placeholder = "Enter text here"
}
myView.font = UIFont.systemFont(ofSize: 15)
myView.translatesAutoresizingMaskIntoConstraints = false
myView.delegate = self
myView.returnKeyType = .done
cell.addSubview(myView)
NSLayoutConstraint(item: myView,attribute: NSLayoutAttribute.height,relatedBy: NSLayoutRelation.equal,toItem: nil,attribute: NSLayoutAttribute.notAnAttribute,multiplier: 1,constant: 40).isActive = true
NSLayoutConstraint(item: myView,attribute: NSLayoutConstraint.Attribute.centerX,relatedBy: NSLayoutConstraint.Relation.equal,toItem: view,constant: 0).isActive = true
NSLayoutConstraint(item: myView,attribute: NSLayoutConstraint.Attribute.width,attribute: NSLayoutConstraint.Attribute.notAnAttribute,constant: 350).isActive = true
} else{
for view in cell.subviews as! [UIView]{
if let label = view as? UITextField {
label.removeFromSuperview()
}
}
}
return cell
}
func tableView(_ tableView: UITableView,viewForHeaderInSection section: Int) -> UIView? {
let headerView = tableView.dequeueReusableheaderfooterView(withIdentifier: "DemoHeaderView") as! DemoHeaderView
headerView.mylabeltitle.text = self.sectionNames[section] as? String
headerView.sublabel.text = "sub heading"
return headerView
}
func tableView(_ tableView: UITableView,heightForHeaderInSection section: Int) -> CGFloat {
return 74.0;
}
func tableView(_ tableView: UITableView,heightForFooterInSection section: Int) -> CGFloat{
return 0;
}
func tableView(_ tableView: UITableView,willdisplayHeaderView view: UIView,forSection section: Int) {
//recast your view as a UITableViewheaderfooterView
let header: UITableViewheaderfooterView = view as! UITableViewheaderfooterView
header.contentView.backgroundColor = UIColor.colorWithHexString(hexStr: "#0075d4")
let topBorderView = UIView(frame: CGRect(x: 0,width: view.frame.size.width,height: 1))
topBorderView.backgroundColor = UIColor.black
header.addSubview(topBorderView)
header.textLabel?.textColor = UIColor.white
if let viewWithTag = self.view.viewWithTag(kHeaderSectionTag + section) {
viewWithTag.removeFromSuperview()
}
let headerFrame = self.view.frame.size
let theImageView = UIImageView(frame: CGRect(x: headerFrame.width - 32,y: 13,width: 18,height: 18));
theImageView.image = UIImage(named: "Chevron-Dn-Wht")
theImageView.tag = kHeaderSectionTag + section
header.addSubview(theImageView)
header.tag = section
let headerTapGesture = UITapGestureRecognizer()
headerTapGesture.addTarget(self,action: #selector(AddMeditationViewController.sectionHeaderWasTouched(_:)))
header.addGestureRecognizer(headerTapGesture)
}
func tableView(_ tableView: UITableView,diddeselectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath,animated: true)
let section = self.sectionItems[indexPath.section] as! NSArray
var t = section[indexPath.row] as? String
// selectedArray.removeAll(where: { $0 == t } )
}
func tableView(_ tableView: UITableView,didSelectRowAt indexPath: IndexPath) {
self.selectedindexPath = indexPath
//self.sections[indexPath.section].SubTiltle = "l"
//section[indexPath.section].SubTiltle = tableView.cellForRowAt(at: indexPath).textLabel?.text
if self.lastSelection != nil {
self.tableview.cellForRow(at: self.lastSelection as IndexPath)?.accessoryType = .none
}
let headerView = tableView.dequeueReusableheaderfooterView(withIdentifier: "DemoHeaderView") as! DemoHeaderView
let section = self.sectionItems[indexPath.section] as! NSArray
var sectionheading = self.sectionNames[indexPath.section] as? String
var subSectionName = (section[indexPath.row] as? String)!
var headerNumber = self.expandedSectionHeaderNumber
self.selectedindexPath = indexPath
// headerView.sublabel.text = subSectionName
//headerView.sec.text = subSectionName
// let headerView2 = tableView.dequeueReusableheaderfooterView(withIdentifier: "DemoHeaderView") as! DemoHeaderView
//headerView2.sublabel.text = subSectionName
self.lastSelection = indexPath as NSIndexPath
self.selectedindexPath = indexPath
tableView.beginUpdates()
tableView.reloadSections([indexPath.section],with: .automatic)
tableView.endUpdates()
self.tableview.deselectRow(at: indexPath,animated: true)
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool { //delegate method
textField.resignFirstResponder()
self.alarmName = (textField.text as String!)
return true
}
// MARK: - Expand / Collapse Methods
@objc func sectionHeaderWasTouched(_ sender: UITapGestureRecognizer) {
let headerView = sender.view as! UITableViewheaderfooterView
let section = headerView.tag
let eImageView = headerView.viewWithTag(kHeaderSectionTag + section) as? UIImageView
if (self.expandedSectionHeaderNumber == -1) {
self.expandedSectionHeaderNumber = section
tableViewExpandSection(section,imageView: eImageView!)
} else {
if (self.expandedSectionHeaderNumber == section) {
tableViewCollapeSection(section,imageView: eImageView!)
} else {
let cImageView = self.view.viewWithTag(kHeaderSectionTag + self.expandedSectionHeaderNumber) as? UIImageView
tableViewCollapeSection(self.expandedSectionHeaderNumber,imageView: cImageView!)
tableViewExpandSection(section,imageView: eImageView!)
}
}
}
func tableViewCollapeSection(_ section: Int,imageView: UIImageView) {
let sectionData = self.sectionItems[section] as! NSArray
self.expandedSectionHeaderNumber = -1;
if (sectionData.count == 0) {
return;
} else {
UIView.animate(withDuration: 0.4,animations: {
imageView.transform = CGAffineTransform(rotationAngle: (0.0 * CGFloat(Double.pi)) / 180.0)
})
var indexesPath = [IndexPath]()
for i in 0 ..< sectionData.count {
let index = IndexPath(row: i,section: section)
indexesPath.append(index)
}
self.tableview!.beginUpdates()
self.tableview!.deleteRows(at: indexesPath,with: UITableViewRowAnimation.fade)
self.tableview!.endUpdates()
}
}
func tableViewExpandSection(_ section: Int,imageView: UIImageView) {
let sectionData = self.sectionItems[section] as! NSArray
if (sectionData.count == 0) {
self.expandedSectionHeaderNumber = -1;
return;
} else {
UIView.animate(withDuration: 0.4,animations: {
imageView.transform = CGAffineTransform(rotationAngle: (180.0 * CGFloat(Double.pi)) / 180.0)
})
var indexesPath = [IndexPath]()
for i in 0 ..< sectionData.count {
let index = IndexPath(row: i,section: section)
indexesPath.append(index)
}
self.expandedSectionHeaderNumber = section
self.tableview!.beginUpdates()
self.tableview!.insertRows(at: indexesPath,with: UITableViewRowAnimation.fade)
self.tableview!.endUpdates()
}
}
}
在选择标题行时，可以做些什么来设置子标题？ 我自己不知所措。在此先感谢，因为我真的被困住了并且要放弃
解决方法
如果您的数据模型包含节标题的功能，那么更改节标题以响应单元格的选择将很简单。您只需更改模型的功能并重新加载数据：
这当然比您的表简单得多，但是原理是完全相同的。我的数据模型同时包含部分数据和行数据：
struct Row {
var name = ""
}
struct Section {
var subtitle = ""
var rowData = [Row]()
}
var model = [Section]()
因此，当用户点击某个单元格时，我会通过更改该部分的subtitle并重新加载数据来进行响应：
func tableView(_ tableView: UITableView,didSelectRowAt indexPath: IndexPath) {
let name = model[indexPath.section].rowData[indexPath.row].name
model[indexPath.section].subtitle = name
tableView.reloadData()
}
（请注意，重新加载表会丢失单元格上的选择指示。我已经解决了这个问题。但是为了简单起见，我省略了该代码，只是显示了表如何工作的基本原理。）