I have a section index that contains full alphabet - however, sections in my table contains only a few letters (e.g. C, F, N, U).
I would like to modify sectionForSectionIndexTitle to properly show right sections when sliding finger over section index. I'm still not sure how to do it using sections.append...
Thank you for help.
This is how my code looks like:
Section.swift
struct Section
{
var heading : String
var items : [String]
init(title: String, objects : [String]) {
heading = title
items = objects
}
}
ViewController.swift
func updateSections(index : Int) {
switch index {
case 0:
sections.append(Section(title: "C", objects: ["Czech Republic"]))
sections.append(Section(title: "F", objects: ["France"]))
sections.append(Section(title: "N", objects: ["Norway"]))
sections.append(Section(title: "U", objects: ["USA"]))
default: break
}
tableViewOutlet.reloadData()
}
let arrIndexSection = ["A","B","C","D", "E", "F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"]
func sectionIndexTitlesForTableView(tableView: UITableView) -> [String]? {
if segmentedControlOutlet.selectedSegmentIndex == 0 {
return arrIndexSection
} else {
return [""]
}
}
func tableView(tableView: UITableView, sectionForSectionIndexTitle title: String, atIndex index: Int) -> Int {
let temp = arrIndexSection as NSArray
return temp.indexOfObject(title)
}
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return sections.count
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
let section = sections[section]
return section.items.count
}
func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return sections[section].heading
}
try following code in your project :
func tableView(tableView: UITableView, sectionForSectionIndexTitle title: String, atIndex index: Int) -> Int {
var tempIndex:Int = 0
for str in arrIndexSection {
if str == title {
return tempIndex
}
tempIndex += 1
}
return 0
}
Related
I really need help as I am new to Swift. I am facing an issue where I don't find a way to return numberOfRowsInSection
Scenario:
I have 3 numberOfSections in tableview which I am returning from sectionArray, which is as follows:
{
"mbsdcie6_2_1": "Incomer 132 KV Parameters",
"mbsdcie6_2_2": [
3,
6,
4,
5,
8,
30,
31,
7,
18,
29,
1
]
},
{
"mbsdcie6_2_1": "SMS2 Parameters",
"mbsdcie6_2_2": [
9,
10,
11,
12,
13,
14
]
},
{
"mbsdcie6_2_1": "SMS 1 Parameters",
"mbsdcie6_2_2": [
15,
17
]
}
]
}
Using above array, I can return numberOfSections like this:
func numberOfSections(in tableView: UITableView) -> Int {
return self.sectionArray.count
}
But, how to return numberOfRowsInSection using sectionArray ??
Note:
I want numberOfRows from "mbsdcie6_2_2" key of sectionArray
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if section == 0 {
return "numberOfRows" // What to return here?
}
if section == 1 {
return "numberOfRows"
}
if section == 2 {
return "numberOfRows"
}
return 0
}
Edit 1
This is how I added data into sectionArray:
// It comes from another webservice, so I added it to userdefaults.
let headers = swiftyJSonVar["message"][0]["mbsdcie6"]["mbsdcie6_2"].arrayObject
kUserDefault.set(headers, forKey: kHeadersArray)
// In my another ViewController, I am retrieving it like this:
var sectionArray = [Dictionary<String, Any>]()
override func viewWillAppear(_ animated: Bool) {
sectionArray = kUserDefault.array(forKey: kHeadersArray) as! [Dictionary<String, Any>]
print(sectionArray)
}
I know it could be silly and It's way too easy but somehow I am stucked as I am new to it.
Any help would be appreciated, Thanks!
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if !sectionArray.isEmpty {
let sectionContent = sectionArray[section]["mbsdcie6_2_2"] as? [Int]
return sectionContent.count
} else {
return 0
}
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if sectionArray.indices.contains(section),
let sectionContent = sectionArray[section]["mbsdcie6_2_2"] as? [Int] {
return sectionContent.count
} else {
return 0
}
}
try this:
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
let singleSection = self.sectionArray[section]
if let rows = singleSection["mbsdcie6_2_2"] as? [Int] {
return rows.count
} else {
return 0
}
}
My JSON data file is already alphabetized and is properly showing in my TableView. I set up my section titles using:
struct FigureStats: Decodable {
let name: String
let number: String
let year: String?
}
var figSectionTitles = [String]()
var figures = [FigureStats]()
override func viewDidLoad() {
super.viewDidLoad()
figSectionTitles = [String](arrayLiteral: "#", "A", "B", "C")
}
func tableView( tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return figSectionTitles [section]
}
func tableView( tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return figures.count
}
func downloadJSON(completed: #escaping () -> ()) {
let url = URL(string: "https://xxxx")
URLSession.shared.dataTask(with: url!) { (data, response, error) in
if error == nil {
do {
self.figures = try JSONDecoder().decode([FigureStats].self, from: data!)
DispatchQueue.main.async {
completed()
}
} catch {
print("JSON Error")
}
}
}.resume()
}
The problem is all of the entries are repeated inside each section instead of falling under the correct section based on the first character of each name.
How can get the first character of each name and then get those entries to fall under the correct section?
You can use init(grouping:by:) to group the array into Dictionary.
class ViewController: UIViewController,UITableViewDelegate,UITableViewDataSource {
var figures = [Employee]()
var figuresByLetter = [(key: String, value: [Employee])]()
override func viewDidLoad() {
super.viewDidLoad()
figures = [Employee(name: "Kofi", year: 2000, id: 1),Employee(name: "Abena", year: 2002, id: 2),Employee(name: "Efua", year: 2003, id: 3),Employee(name: "Kweku", year: 2003, id: 3),Employee(name: "Akosua", year: 2003, id: 3)]
figuresByLetter = Dictionary(grouping: figures, by: { String($0.name.trimmingCharacters(in: .whitespaces).first!) }).sorted(by: { $0.0 < $1.0 })
print(figuresByLetter)
}
func numberOfSections(in tableView: UITableView) -> Int {
return figuresByLetter.count
}
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return figuresByLetter[section].key
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return figuresByLetter[section].value.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell") ?? UITableViewCell(style: .default, reuseIdentifier: "cell")
cell.textLabel?.text = figuresByLetter[indexPath.section].value[indexPath.row].name
return cell
}
}
struct Employee {
var name:String?
var year:Int?
var id:Int?
}
Data after grouping
[(key: "A", value: [Employee(name: "Abena", year: 2002, id: 2), Employee(name: "Akosua", year: 2003, id: 3)]),
(key: "E", value: [Employee(name: "Efua", year: 2003, id: 3)]),
(key: "K", value: [Employee(name: "Kofi", year: 2000, id: 1), Employee(name: "Kweku", year: 2003, id: 3)])]
func numberOfSections(in tableView: UITableView) -> Int {
return figuresByLetter.count
}
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
let sectionTitle = figuresByLetter[indexPath.section]
return sectionTitle
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
let sectionTitle = figuresByLetter[indexPath.section]
//filteredArray = filter the array of figures based on current section value
return filteredArray.count
}
I have a controller with buttons and a TableViewController with 10 arrays. Each button has an index, which pass to TableViewController.
In TableViewController code looks like this:
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if buttonIndex == 0 {
return array0.count
}
else if buttonIndex == 1 {
return array1.count
}
else if buttonIndex == 2 {
return array2.count
}
else if buttonIndex == 3 {
return array3.count
}
else if buttonIndex == 4 {
return array4.count
}
else if buttonIndex == 5 {
return array5.count
}
else if buttonIndex == 6 {
return array6.count
}
else if buttonIndex == 7 {
return array6.count
}
else if buttonIndex == 8 {
return array6.count
}
return array0.count
}
I want to automatically define current index to do this:
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
//return array(currentIndex).count
}
How to do it?
One way to achieve what you want is by creating a map, with index as key and array as value.
So your code should look something like this:
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return indicesArray[index].count
}
You can make nested array where to store your arrays like:
var mainArray = [array0,array1,array2 ... ]
Then in
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return mainArray[section].count
}
You have to make the collection of your array in the array and you could be able to return as your requirement.
At class level:
var arrOfArrayData = []
Just like that:
let array0 = [""]
let array1 = [""]
let array2 = [""]
let array3 = [""]
let array4 = [""]
let array5 = [""]
let array6 = [""]
arrOfArrayData = [array0,array1,array1,array3,array4,array5,array6]
return arrOfArrayData[section].count //numberOfRowsInSection
Your list which contains 10 values as an array:
let listData = [["value11", "value12"], ["value21", "value22"], ["value31", "value32"] ...]
Inside UITableViewDataSource delegate method:
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return listData[section].count
}
I'm looking to group and sort a list of users from backendless, similar to iPhone contacts. I want to add sectionIndexTitlesForTableView(_:), titleForHeaderInSection(_:), and sectionForSectionIndexTitle(_:). I haven't found a tutorial on how to do this, and I have been stuck for weeks.
So far, I'm able to retrieve users and populate the table view. I also implemented UISearchBarDelegate.
var users: [BackendlessUser] = []
var filteredUsers : [BackendlessUser] = []
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if tableView == self.tableView {
return users.count
} else {
return self.filteredUsers.count
}
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = UITableViewCell()
if tableView == self.tableView {
let user = users[indexPath.row]
cell.textLabel?.text = user.name
} else {
let filteredUser = filteredUsers[indexPath.row]
cell.textLabel?.text = filteredUser.name
}
return cell
}
You must have a dictionary of array (name 'data' for example)
data["A"] = ["Ananas", "Anaconda", "Apple"]
data["B"] = ["Banana", "Baby"]
...
data["Z"] = ["Zoro"]
begin:
let letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
var headers: [String] = []
var data : [String: [String]] = [:] // Choose your type
override func viewDidLoad(){
// Do your stuff...
headers = letters.keys.sort()
// init your data var
data = ...
tableView.reloadData()
}
for header:
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return headers.count
}
func sectionHeaderTitlesForTableView(tableView: UITableView) -> [String]?{
return headers
}
func tableView: UITableView, titleForHeaderInSection section: Int) -> String?{
return headers[section];
}
cell
func tableView(tableView: UITableView, numberOfRowInSection section: Int) -> Int {
// Exemple
return data[section].count
}
I am loading contacts in UITableView and I want to add index at the right end for user to navigate through contacts.
I am using the code:
var indexOfNames = [String]()
let indexNames = "A B C D E F G H I J K L M N O P Q R S T U V W X Y Z"
indexOfNames = indexNames.componentsSeparatedByString(" ")
func sectionIndexTitlesForTableView(tableView: UITableView) -> [String]? {
return indexOfNames
}
func tableView(tableView: UITableView, sectionForSectionIndexTitle title: String, atIndex index: Int) -> Int {
let temp = indexOfNames as NSArray
return temp.indexOfObject(title)
}
But it is not working. When I tap on the index, the table view comes to the top row. i.e. A. I have set the delegates for tableview. Maybe there is some issues with Swift 2.0?
Adding index to UITableView working for me may help you (for swift 2.0):
var arrIndexSection : NSMutableArray = ["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"]
//MARK:- TableView Datasource/DataDelegate Method
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return arrIndexSection.count
}
func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return arrIndexSection.objectAtIndex(section) as? String
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 5
}
func sectionIndexTitlesForTableView(tableView: UITableView) -> [String]? {
return self.arrIndexSection as? [String]
}