UITableView : Sectioning and Indexing
發表於 : 週三 12月 09, 2015 3:18 pm
代碼: 選擇全部
import UIKit
class Model: NSObject
{
var Name: String
var City: String
var section: Int?
init(name: String, city: String)
{
self.Name = name
self.City = city
}
}
代碼: 選擇全部
class ViewController: UITableViewController
{
var DataSource: [Model] = [Model]()
// custom type to represent table sections
class Section {
var items: [Model] = []
func add(item: Model) {
self.items.append(item)
}
}
// `UIKit` convenience class for sectioning a table
let collation = UILocalizedIndexedCollation.currentCollation() as UILocalizedIndexedCollation
// table sections
var sections: [Section] {
// return if already initialized
if self._sections != nil {
return self._sections!
}
// create users from the name list
let items: [Model] = MapDatasourceToIndex()
// create empty sections
let sections: [Section] = CreateEmptySections()
// put each item in a section
PutEachItemInSection(items, target: sections)
// sort each section
SectionItemsSort(sections)
self._sections = sections
return self._sections!
}
var _sections: [Section]?
func SectionItemsSort(target: [Section])
{
for section in target {
section.items = self.collation.sortedArrayFromArray(section.items, collationStringSelector: "Name") as! [Model]
}
}
func PutEachItemInSection(source: [Model], target: [Section])
{
for item in source {
target[item.section!].add(item)
}
}
func CreateEmptySections() -> [Section]
{
var sections = [Section]()
for _ in 0..<self.collation.sectionIndexTitles.count {
sections.append(Section())
}
return sections
}
func MapDatasourceToIndex() -> [Model]
{
let dataSource = DataSource
// create users from the name list
return dataSource.map { model in
model.section = self.collation.sectionForObject(model, collationStringSelector: "Name")
return model
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
DataSource.append(Model(name: "A_Rusli1", city: "City1"))
DataSource.append(Model(name: "A_Rusli2", city: "City2"))
DataSource.append(Model(name: "B_Rusli1", city: "City3"))
DataSource.append(Model(name: "B_Rusli2", city: "City4"))
DataSource.append(Model(name: "C_Rusli1", city: "City5"))
DataSource.append(Model(name: "C_Rusli2", city: "City6"))
DataSource.append(Model(name: "C_Rusli3", city: "City7"))
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return self.sections.count
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return self.sections[section].items.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath)
let cust = self.sections[indexPath.section].items[indexPath.row]
cell.textLabel?.text = cust.Name
cell.detailTextLabel?.text = cust.City
return cell
}
override func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String
{
// do not display empty `Section`s
if !self.sections[section].items.isEmpty {
return self.collation.sectionTitles[section] as String
}
return ""
}
override func sectionIndexTitlesForTableView(tableView: UITableView) -> [String]?
{
return self.collation.sectionIndexTitles
}
override func tableView(tableView: UITableView, sectionForSectionIndexTitle title: String, atIndex index: Int) -> Int
{
return self.collation.sectionForSectionIndexTitleAtIndex(index)
}
}