我有一个包含3个部分(服务,可用性和天数)的表视图,每个部分都有多行。我选择任何一行时都实现了一个复选标记。现在,我想在第一次关闭它后再次显示表时再次看到所选行。就像显示所选项目的历史一样。
这是显示复选标记的代码:
func save(){
if let indexPaths = self.tableView.indexPathsForSelectedRows{
for indexPath in indexPaths{
switch indexPath.section{
case SectionIndex.Services.rawValue:
switch indexPath.row{
case ServicesIndex.Recieve.rawValue:
selectedServices.insert("RECEIVE")
case ServicesIndex.Send.rawValue:
selectedServices.insert("SEND")
default:
Void()
}//end switch
case SectionIndex.Availability.rawValue:
switch indexPath.row{
case AvailabiltiyIndex.Morning.rawValue:
selectedAvailabilities.append(6.0...9.0)
case AvailabiltiyIndex.Regular.rawValue :
selectedAvailabilities.append(9.0...18.0)
case AvailabiltiyIndex.Evening.rawValue:
selectedAvailabilities.append(18.0...21.0)
default:
Void()
}//end switch
case SectionIndex.Days.rawValue:
switch indexPath.row{
case DaysIndex.Sunday.rawValue:
selectedDays.insert("Sunday")
case DaysIndex.Monday.rawValue:
selectedDays.insert("Monday")
case DaysIndex.Tuesday.rawValue:
selectedDays.insert("Tuesday")
case DaysIndex.Wednesday.rawValue:
selectedDays.insert("Wednesday")
case DaysIndex.Thursday.rawValue:
selectedDays.insert("Thursday")
case DaysIndex.Friday.rawValue:
selectedDays.insert("Friday")
case DaysIndex.Saturday.rawValue:
selectedDays.insert("Saturday")
default:
Void()
}//end switch
default:
Void()
}//end switch
}//end for
}//end If
}//end save
现在这里我从所选行获取数据的方法:
CREATE TABLE tmp (
INDEX(someColumnProperty)
)
SELECT ...;
答案 0 :(得分:0)
表视图解除后,选择状态本身会丢失。没有照顾它,它只是国家的一部分,观点管理。
在save
方法中,您正在存储“选择状态”。您有以下selectedServices
,selectedAvailabilities
和selectedDays
个变量存储选择状态。如果在第二次显示表格视图时仍然有这些,则可以从中提取选择状态。
可能你更改了updateCell调用:
updateCell(indPath, select: false)
到此:
updateCell(indPath, select: selectionState(indPath))
并定义一个这样的方法:(注意selectedServices.contains("RECEIVE")
)
func selectionState(indexpath: NSIndexPath) -> Bool {
let indPath = indexPath
let section = indPath.section
switch section {
case 0:
switch indexPath.row{
case ServicesIndex.Recieve.rawValue:
return selectedServices.contains("RECEIVE")
...
case 1:
updateCell(indPath, select: false)
case 2:
updateCell(indPath, select: false)
default:
Void()
}
}
contains
方法实际上从数据模型中提取出选择状态(这些实例是selectedServices
引用的这些实例等)。如果无法实现contains
方法,则可能必须创建仅存储选择状态的数据结构。然后,您从该数据结构中读取选择状态,并将选择状态写入数据结构和selectedServices
等实例。
答案 1 :(得分:0)
我添加了一个委托方法,在我的过滤器中添加了以下内容:
protocol FilterSettingsDelegate:class{
func filtercontrollerWillDissmiss(data: Set<NSIndexPath>)
}
class FilterTableViewController: UITableViewController {
weak var delegate: FilterSettingsDelegate?
var filterSettings : Set<NSIndexPath>? = []
...
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
self.filterSettings!.insert(indexPath)
let indPath = indexPath
let section = indPath.section
switch section {
case 0:
updateCell(indPath, select: true)
....
override func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath) {
if self.filterSettings != nil {
self.filterSettings!.remove(indexPath)
}
let indPath = indexPath
let section = indPath.section
switch section {
case 0:
....
在我的地图视图中,我添加了以下内容:
class SearchViewController: UIViewController, UISearchBarDelegate, FilterSettingsDelegate {
var filterSettings : Set<NSIndexPath>?
....
//Delegate Method
func filtercontrollerWillDissmiss(data: Set<NSIndexPath>) {
self.filterSettings = data
}
//Then pass the data in the segue
case "FilterSegue" :
let navController = segue.destinationViewController as! UINavigationController
if let controller = navController.topViewController as? FilterTableViewController{
if self.filterSettings != nil{
controller.filterSettings = self.filterSettings
}
controller.delegate = self
}