这是我的密码-
var subCategories = [SubCategoryCellInfo]()
var sectionsArray = [String]()
func querySections() -> [String] {
for selection in subCategories {
let subCategory = selection.itemPreset
sectionsArray.append(subCategory ?? "")
}
let uniqueSectionsArray = Set(sectionsArray).sorted()
return uniqueSectionsArray
}
func queryItemPreset(section:Int) -> [Int] {
var sectionItems = [Int]()
for selection in subCategories {
let itemPreset = selection.itemPreset
if itemPreset == querySections()[section] {
sectionItems.append(querySections().count)
}
}
return sectionItems
}
func numberOfSections(in tableView: UITableView) -> Int {
return querySections().count
}
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return querySections()[section]
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if isFiltering(){
return filtered.count
}
return queryItemPreset(section: section).count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let subCell = tableView.dequeueReusableCell(withIdentifier: "subCell", for: indexPath) as! SubCategoryTableViewCell
let section = queryItemPreset(section: indexPath.section)
let task = section[indexPath.row]
let sub: SubCategoryCellInfo
if isFiltering(){
sub = filtered[task]
}
else{
sub = subCategories[task]
}
subCell.nameOfLocationText.text = sub.itemPreset
return subCell
}SubCategoryCellInfo:
class SubCategoryCellInfo{
var itemPreset: String?
init(itemPreset:String?){
self.itemPreset = itemPreset
}
}解决方案:我基于itemPreset将数组分组,然后使用该部分
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let subCell = tableView.dequeueReusableCell(withIdentifier: "subCell", for: indexPath) as! SubCategoryTableViewCell
let groupedDictionary = Dictionary(grouping: subCategories) { (person) -> String in
return person.itemPreset ?? ""
}
var grouped = [[SubCategoryCellInfo]]()
let keys = groupedDictionary.keys.sorted()
keys.forEach { (key) in
grouped.append(groupedDictionary[key]!)
}
let task = grouped[indexPath.section]
let sub: SubCategoryCellInfo
if isFiltering(){
sub = filtered[indexPath.row]
}
else{
sub = task[indexPath.row]
}
subCell.nameOfLocationText.text = sub.itemPreset
return subCell
}发布于 2019-04-21 17:52:45
解决方案:基于itemPreset将数组分组为区段,然后使用该节。
func tableView(_ tableView: UITableView,cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let subCell = tableView.dequeueReusableCell(withIdentifier: "subCell", for: indexPath) as! SubCategoryTableViewCell
let groupedDictionary = Dictionary(grouping: subCategories) { (person) -> String in
return person.itemPreset ?? ""
}
var grouped = [[SubCategoryCellInfo]]()
let keys = groupedDictionary.keys.sorted()
keys.forEach { (key) in
grouped.append(groupedDictionary[key]!)
}
let task = grouped[indexPath.section]
let sub: SubCategoryCellInfo
if isFiltering(){
sub = filtered[indexPath.row]
}
else{
sub = task[indexPath.row]
}
subCell.nameOfLocationText.text = sub.itemPreset
return subCell
}发布于 2019-04-18 04:03:36
在您的SubCategoryTableViewCell中编写以下代码。
override func prepareForReuse() {
super.prepareForReuse()
nameOfLocationText.text = nil
}https://stackoverflow.com/questions/55738718
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