我创建了一个Form，我正在使用Textfields和TextField Dropdown。当我滚动TableView时，文本字段值丢失，文本字段下拉值自动设置为默认值。
这是我的代码：
enum TextFieldTags:Int {
case ProspectName = 10, VisitDate, VisitType, Industry, Source, DissSummary, Requirements, FollowUpDate, AnticipatedDealValue, Probability, ExpectedClosingDate, Status, NextStep, Emp, Rev, AddressLine1, AddressLine2, Country, States, City, Zip, Mobile,Fax
}
var prospectName:String?, visitDate:String? , visitType:String?, industry:String?, source:String?, dissSummary:String?, requirements:String?, followUpDate:String?, anticipatedDealValue:String?, probability:String?, expectedClosingDate:String?, status:String?, nextStep:String?, emp:String?, rev:String?, addressLine1:String?, addressLine2:String?, country, statesVal:String?, cityVal:String?, zip:String?, mobile:String?,fax:String?
var currentLeadMaster:WizLeadMaster?
// MARK: - Section Data Structure
struct Section {
var name: String!
var options: [Any]!
var collapsed: Bool!
var optionItem:[Any]!
var icon:UIImage!
init(name: String, options: [Any], collapsed: Bool = false,optionItem:[Any],icon:UIImage) {
self.name = name
self.options = options
self.collapsed = collapsed
self.optionItem = optionItem
self.icon = icon
}
}
// MARK: - Properties
@IBOutlet weak var tblLeadDetail:UITableView?
var dataSource:NSArray = NSArray(objects: "Lead Summary","Address","Products","Contacts","Attachment","Follow Up","Remarks")
var sections = [Section]()
lazy var visitArr:NSArray = {
let visitTypes = Handler.fetchLookUpOftype(type: LookUpType.enum_cRMVisittype)
var optionsArray = NSMutableArray(capacity: 0)
for visitType in visitTypes {
let visitModel = visitType as! WizLookUp
let dict = ["system":(visitModel.system! as String),"value":(visitModel.value! as String)]
optionsArray.add(dict as NSDictionary)
}
return optionsArray as NSArray
}()
lazy var leadStatus:NSArray = {
let visitTypes = Handler.fetchLookUpOftype(type: LookUpType.enum_cRMLeadStatus)
var optionsArray = NSMutableArray(capacity: 0)
for visitType in visitTypes {
let visitModel = visitType as! WizLookUp
let dict = ["system":(visitModel.system! as String),"value":(visitModel.value! as String)]
optionsArray.add(dict as NSDictionary)
}
return optionsArray as NSArray
}()
lazy var leadSource:NSArray = {
let visitTypes = Handler.fetchLookUpOftype(type: LookUpType.enum_cRMLeadsource)
var optionsArray = NSMutableArray(capacity: 0)
for visitType in visitTypes {
let visitModel = visitType as! WizLookUp
let dict = ["system":(visitModel.system! as String),"value":(visitModel.value! as String)]
optionsArray.add(dict as NSDictionary)
}
return optionsArray as NSArray
}()
lazy var industries:NSArray = {
let visitTypes = Handler.fetchLookUpOftype(type: LookUpType.enum_cRMCustomerType)
var optionsArray = NSMutableArray(capacity: 0)
for visitType in visitTypes {
let visitModel = visitType as! WizLookUp
let dict = ["system":(visitModel.system! as String),"value":(visitModel.value! as String)]
optionsArray.add(dict as NSDictionary)
}
return optionsArray as NSArray
}()
lazy var countries:NSArray = {
let visitTypes = Handler.countriesList()
var optionsArray = NSMutableArray(capacity: 0)
for visitType in visitTypes {
let visitModel = visitType as! WizCountryList
let dict = ["system":(visitModel.lable! as String),"value":(visitModel.value! as String)]
optionsArray.add(dict as NSDictionary)
}
return optionsArray as NSArray
}()
lazy var states:NSArray = {
let visitTypes = Handler.fetchLookUpOftype(type: LookUpType.enum_cRMTerritory)
var optionsArray = NSMutableArray(capacity: 0)
for visitType in visitTypes {
let visitModel = visitType as! WizLookUp
let dict = ["system":(visitModel.system! as String),"value":(visitModel.value! as String)]
optionsArray.add(dict as NSDictionary)
}
return optionsArray as NSArray
}()
func setStatesForCountry(_ country:String) -> Void{
}
func filterValue(_ arr:NSArray,key:String) -> Any {
let predicate = NSPredicate(format: "self == %@", key)
let filteredArr = arr.filtered(using: predicate)
if (filteredArr.count == 0) {
return ""
}
return filteredArr[0]
}
// MARK: - ViewDidLoad
override func viewDidLoad() {
super.viewDidLoad()
let barButtonItem = UIBarButtonItem(image:UIImage(named:"save1") , style: UIBarButtonItemStyle.done, target: self, action: #selector(saveLeadInfo))
navigationItem.rightBarButtonItem = barButtonItem
sections = [
Section(name: "Lead Summary", options: [["title":"Prospect Name","type":"input","value":(currentLeadMaster == nil) ? "":currentLeadMaster?.customer_name as Any,"tag":TextFieldTags.ProspectName.rawValue],
["title":"Visit Date","type":"date","value":(currentLeadMaster == nil) ? "":currentLeadMaster?.visited_date as Any,"tag":TextFieldTags.VisitDate.rawValue],
["title":"Visit Type","type":"dropdown","options":visitArr.value(forKeyPath: "system") as! Array<String>,"value":filterValue(visitArr.value(forKeyPath: "value") as! NSArray, key: ((currentLeadMaster == nil) ? "":currentLeadMaster?.visit_type)!),"tag":TextFieldTags.VisitType.rawValue],
["title":"Industry","type":"dropdown","options":industries.value(forKeyPath: "system"),"value":filterValue(industries.value(forKeyPath: "value") as! NSArray, key: ((currentLeadMaster == nil) ? "":currentLeadMaster?.type)!),"tag":TextFieldTags.Industry.rawValue],
["title":"Source","type":"dropdown","options":leadSource.value(forKeyPath: "system"),"value":filterValue(leadSource.value(forKeyPath: "value") as! NSArray , key: ((currentLeadMaster == nil) ? "":currentLeadMaster?.source)!),"tag":TextFieldTags.Source.rawValue],
["title":"Discussion Summary","type":"input","value":(currentLeadMaster == nil) ? "":currentLeadMaster?.summary_disc as Any,"tag":TextFieldTags.DissSummary.rawValue],
["title":"Requirements","type":"input","value":(currentLeadMaster == nil) ? "":currentLeadMaster?.requirements as Any ,"tag":TextFieldTags.Requirements.rawValue],
["title":"Follow-Up Date","type":"date","value":(currentLeadMaster == nil) ? "":currentLeadMaster?.followup_date as Any,"tag":TextFieldTags.FollowUpDate.rawValue],
["title":"Anticipated Deal Value","type":"input","value":(currentLeadMaster == nil) ? "":currentLeadMaster?.anticipated_deal_value as Any,"tag":TextFieldTags.AnticipatedDealValue.rawValue],
["title":"Probabilty","type":"input","value":(currentLeadMaster == nil) ? "":currentLeadMaster?.probability as Any,"tag":TextFieldTags.Probability.rawValue],
["title":"Expected Closing Date","type":"date","value":currentLeadMaster?.expected_closing_date as Any,"tag":TextFieldTags.ExpectedClosingDate.rawValue],
["title":"Status","type":"dropdown","options":leadStatus.value(forKeyPath: "system"),"value":filterValue(leadStatus.value(forKeyPath: "value") as! NSArray, key: ((currentLeadMaster == nil) ? "":currentLeadMaster?.status)!),"tag":TextFieldTags.Status.rawValue],
["title":"Next Step","type":"input","value":(currentLeadMaster == nil) ? "":currentLeadMaster?.next_activity_planned as Any,"tag":TextFieldTags.NextStep.rawValue],
["title":"Emp","type":"input","value":(currentLeadMaster == nil) ? "":currentLeadMaster?.no_of_emp as Any,"tag":TextFieldTags.Emp.rawValue],
["title":"Rev","type":"input","value":(currentLeadMaster == nil) ? "":currentLeadMaster?.annual_revenue as Any,"tag":TextFieldTags.Rev.rawValue]], collapsed: true, optionItem: [],icon:UIColor.clear.getImage(size: CGSize(width: 30, height: 30))),
Section(name: "Address", options: [["title":"Address Line 1","type":"input","value":(currentLeadMaster == nil) ? "":currentLeadMaster?.addressline1 as Any ,"tag":TextFieldTags.AddressLine1.rawValue],
["title":"Address Line 2","type":"input","value":(currentLeadMaster == nil) ? "":currentLeadMaster?.addressline2 as Any,"tag":TextFieldTags.AddressLine2.rawValue],
["title":"Select Country","type":"dropdown","options":countries.value(forKeyPath: "system") as! Array<String>,"value":filterValue(visitArr.value(forKeyPath: "value") as! NSArray, key: ((currentLeadMaster == nil) ? "":currentLeadMaster?.visit_type)!),"tag":TextFieldTags.Country.rawValue],
["title":"Select States","type":"dropdown","options":visitArr.value(forKeyPath: "system") as! Array<String>,"value":filterValue(visitArr.value(forKeyPath: "value") as! NSArray, key: ((currentLeadMaster == nil) ? "":currentLeadMaster?.visit_type)!),"tag":TextFieldTags.States.rawValue],
["title":"Select City","type":"input","value":(currentLeadMaster == nil) ? "":currentLeadMaster?.addressline2 as Any,"tag":TextFieldTags.City.rawValue],
["title":"Zip Code","type":"input","value":(currentLeadMaster == nil) ? "":currentLeadMaster?.addressline2 as Any,"tag":TextFieldTags.Zip.rawValue],
["title":"Mobile","type":"input","value":(currentLeadMaster == nil) ? "":currentLeadMaster?.addressline2 as Any,"tag":TextFieldTags.Mobile.rawValue],
["title":"Fax","type":"input","value":(currentLeadMaster == nil) ? "":currentLeadMaster?.addressline2 as Any,"tag":TextFieldTags.Fax.rawValue]
], collapsed: true, optionItem: [],icon:UIColor.clear.getImage(size: CGSize(width: 30, height: 30))),
Section(name: "Product", options: [], collapsed: true, optionItem: [],icon:UIImage.init(named: "add")!),
Section(name: "Contacts", options: [], collapsed: true, optionItem: [],icon:UIImage.init(named: "add")!),
Section(name: "Attachment", options: [], collapsed: true, optionItem: [],icon:UIImage.init(named: "attach")!),
]
let headerNib = UINib(nibName: "WizHeaderView", bundle: nil)
tblLeadDetail?.register(headerNib, forHeaderFooterViewReuseIdentifier: "headerLeads")
let textInputCell = UINib(nibName: "TextInputCell", bundle: nil)
tblLeadDetail?.register(textInputCell, forCellReuseIdentifier: "textinputcell")
let dropDownInputCell = UINib(nibName: "DropDownInputCell", bundle: nil)
tblLeadDetail?.register(dropDownInputCell, forCellReuseIdentifier: "dropDownInputCell")
let dropDownDateCell = UINib(nibName: "DropDownDateCell", bundle: nil)
tblLeadDetail?.register(dropDownDateCell, forCellReuseIdentifier: "dropDownDateCell")
tblLeadDetail?.reloadData()
}
func saveLeadInfo() -> Void {
}
// MARK: - TableView Delegates & Datasource
func numberOfSections(in tableView: UITableView) -> Int {
return sections.count
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
let optionsArray = sections[section].options
return optionsArray!.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let optionsArray = sections[indexPath.section].options
let dict = optionsArray?[indexPath.row] as! Dictionary<String,Any>
if (dict["type"] as! String == "dropdown") {
let cell = tableView.dequeueReusableCell(withIdentifier: "dropDownInputCell") as! DropDownInputCell
cell.txtInput.isOptionalDropDown = false
cell.txtInput.itemList = dict["options"] as! [String]
cell.lblText.text = dict["title"] as? String
cell.txtInput.selectedItem = dict["value"] as? String
cell.txtInput.tag = (dict["tag"] as? NSInteger)!
cell.backgroundColor = UIColor.clear
cell.selectionStyle = UITableViewCellSelectionStyle.none
cell.delegate = self
return cell
}
else if (dict["type"] as! String == "input") {
let cell = tableView.dequeueReusableCell(withIdentifier: "textinputcell") as! TextInputCell
cell.lblText.text = dict["title"] as? String
cell.selectionStyle = UITableViewCellSelectionStyle.none
cell.backgroundColor = UIColor.clear
cell.txtInput.text = dict["value"] as? String
cell.txtInput.tag = (dict["tag"] as? NSInteger)!
cell.delegate = self
return cell
}
else{
let cell = tableView.dequeueReusableCell(withIdentifier: "dropDownDateCell") as! DropDownDateCell
cell.lblText.text = dict["title"] as? String
cell.txtInput.dropDownMode = IQDropDownMode.datePicker
if dict["value"] as? String == "" {
cell.txtInput.setDate(Date(), animated: true)
}
else{
cell.txtInput.selectedItem = dict["value"] as? String
}
cell.txtInput.tag = (dict["tag"] as? NSInteger)!
cell.selectionStyle = UITableViewCellSelectionStyle.none
cell.backgroundColor = UIColor.clear
cell.delegate = self
return cell
}
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
// if indexPath.row == 0 {
// performSegue(withIdentifier: "leadsummary", sender:nil)
// }
// else{
// performSegue(withIdentifier: "leadaddress", sender:nil)
// }
}
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let header = tableView.dequeueReusableHeaderFooterView(withIdentifier: "headerLeads") as? WizHeaderView ?? WizHeaderView(reuseIdentifier: "headerLeads")
header.delegate = self
header.lblLeadSummary.text = sections[section].name
header.btnArrowButton.setImage(sections[section].icon, for: UIControlState.normal)
header.setCollapsed(sections[section].collapsed)
header.section = section
return header
}
func toggleSection(_ header: WizHeaderView, section: Int) {
let collapsed = !sections[section].collapsed
// Toggle collapse
sections[section].collapsed = collapsed
header.setCollapsed(collapsed)
// Adjust the height of the rows inside the section
tblLeadDetail?.beginUpdates()
for i in 0 ..< sections[section].options.count {
tblLeadDetail?.reloadRows(at: [IndexPath(row: i, section: section)], with: .automatic)
}
tblLeadDetail?.endUpdates()
}
@IBAction func placeOrder(_ sender: Any) {
let placeOrder = MainStoryBoard.instantiateViewController(withIdentifier: "PlaceOrder")
navigationController?.pushViewController(placeOrder, animated: true)
}
func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return 35.0
}
func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
return 10.0
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return sections[(indexPath as NSIndexPath).section].collapsed! ? 0 : 70.0
}
func cellTextField(_with TextField: IQDropDownTextField, didSelectItem item: String?) {
switch TextField.tag {
case TextFieldTags.VisitType.rawValue:
visitType = item
break
case TextFieldTags.Industry.rawValue:
industry = item
break
case TextFieldTags.Source.rawValue:
source = item
break
case TextFieldTags.Status.rawValue:
status = item
break
case TextFieldTags.Country.rawValue:
country = item
break
case TextFieldTags.States.rawValue:
statesVal = item
break
default: break
}
}
func cellTextFieldDidEndEditing(_with textField: UITextField) {
switch textField.tag {
case TextFieldTags.ProspectName.rawValue:
prospectName = textField.text
break
case TextFieldTags.DissSummary.rawValue:
dissSummary = textField.text
break
case TextFieldTags.Requirements.rawValue:
requirements = textField.text
break
case TextFieldTags.AnticipatedDealValue.rawValue:
anticipatedDealValue = textField.text
break
case TextFieldTags.Probability.rawValue:
probability = textField.text
break
case TextFieldTags.NextStep.rawValue:
nextStep = textField.text
break
case TextFieldTags.Emp.rawValue:
emp = textField.text
break
case TextFieldTags.Rev.rawValue:
rev = textField.text
break
case TextFieldTags.AddressLine1.rawValue:
addressLine1 = textField.text
break
case TextFieldTags.AddressLine2.rawValue:
addressLine2 = textField.text
break
case TextFieldTags.City.rawValue:
cityVal = textField.text
break
case TextFieldTags.Mobile.rawValue:
mobile = textField.text
break
case TextFieldTags.Fax.rawValue:
fax = textField.text
break
case TextFieldTags.Zip.rawValue:
zip = textField.text
break
default: break
}
}
func stringFromDate(_ date:Date) -> String {
let formatter = DateFormatter()
formatter.dateFormat = "yyyy-MM-dd"
return formatter.string(from: date)
}
func cellTextFieldDate(_with textField: IQDropDownTextField, didSelect date: Date?) {
switch textField.tag {
case TextFieldTags.VisitDate.rawValue:
visitDate = stringFromDate(date!)
break
case TextFieldTags.FollowUpDate.rawValue:
followUpDate = stringFromDate(date!)
break
case TextFieldTags.ExpectedClosingDate.rawValue:
expectedClosingDate = stringFromDate(date!)
break
default: break
}
}
}
extension UIColor {
func getImage(size: CGSize) -> UIImage {
let renderer = UIGraphicsImageRenderer(size: size)
return renderer.image(actions: { rendererContext in
self.setFill()
rendererContext.fill(CGRect(x: 0, y: 0, width: size.width, height: size.height))
})
}}
答案 0 :(得分：1)
在使用UITableView with reusable cell identifier时，您必须存储UITextField或任何其他输入字段的输入，当您在用于填充所有单元格的数据源中完成编辑时。因为可重复使用的单元管理内存本身来绘制所有控件，所以当您滚动tableview时，不保证您的数据保持不变。
答案 1 :(得分：0)
在此if - else表达式
if dict["value"] as? String == "" {
cell.txtInput.setDate(Date(), animated: true)
} else{
cell.txtInput.selectedItem = dict["value"] as? String
}
根据字典值设置两个不同的 UI元素。 在重复使用单元格时，这些UI状态将保留，直到下次更改为止。
您必须确保将每个 UI元素设置为已定义的状态以避免意外行为，因此您还需要设置其他UI元素。例如（[default value]只是占位符）。
if dict["value"] as? String == "" {
cell.txtInput.setDate(Date(), animated: true)
cell.txtInput.selectedItem = [default value]
} else{
cell.txtInput.setDate([default value], animated: [default value])
cell.txtInput.selectedItem = dict["value"] as? String
}
如果没有唯一default value，您必须向数据源添加属性以保持日期和所选项目的当前状态。
关于文本字段，您必须在更改文本后更新数据源，因为在cellForRow中，文本字段始终从数据源更新。
而且 - 一如既往 - 请勿在Swift中使用NS(Mutable)Array和NS(Mutable)Dictionary。您丢弃了重要的类型信息，并且可变集合类型与Swift本机类型无关。最后，您可以删除break表达式中的所有switch行（default之后除外）。它们在Swift中是多余的。