This is my history view, I have a tableview inside view controller. But for some reason i can't output anything, I am trying to hardcode it and its not displaying anything at all. One thing i know is i need to make tableView functions override and if i do that i get error.
import UIKit
class History: UIViewController, UITableViewDataSource, UITableViewDelegate
{
#IBOutlet var tableView: UITableView!
override func viewDidLoad()
{
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
self.view.backgroundColor = UIColor(patternImage: UIImage(named: "newBackground.jpg")!)
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCellWithIdentifier("historyCell", forIndexPath: indexPath) as! historyCell
cell.durationLabel.text = "98"
return cell
}
override func viewWillAppear(animated: Bool)
{
super.viewWillAppear(animated)
}
}
heres my class for the cell prototype, and i made sure that the identifier is also "historyCell"
public class historyCell: UITableViewCell{
#IBOutlet var durationLabel: UILabel!
#IBOutlet var kicksLabel: UILabel!
}
How did you connect your prototype cell's controls to the IBOutlets in you historyCell class ? I didn't know that was possible when you're not using a UITableviewController. I've been using tags all this time.
Unless there's something new that I wasn't aware of, your assignment to cell.durationLabel.text should cause unwrapping of a nil (is that the error you're getting ?)
Related
I've created a tableView, but when I click it, I don't get any results. I wanted to add a new feature to improve my project, but I couldn't add the videos I watched and the things I researched.
Table View
import UIKit
class ViewController1: UIViewController {
#IBOutlet weak var FoodView: UITableView!
let dogfoods = ["pork", "banana", "chicken-leg"]
override func viewDidLoad() {
super.viewDidLoad()
FoodView.delegate = self
FoodView.dataSource = self
// not tapped no see
FoodView.allowsSelection = false
}
}
extension ViewController1: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 120
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return dogfoods.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = FoodView.dequeueReusableCell(withIdentifier: "CustomCell") as! CustomCell
let dogfood = dogfoods[indexPath.row]
cell.foodImageView.image = UIImage(named: dogfood)
cell.nameLabel.text = dogfood
return cell
}
}
CustomCell
class CustomCell: UITableViewCell {
#IBOutlet weak var dogView: UIView!
#IBOutlet weak var nameLabel: UILabel!
#IBOutlet weak var foodImageView: UIImageView!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
}
When I click on one of the cells in the picture, I want to write a larger version of the picture and a description, how can I do this? When I searched on the internet, I applied similar ones, but I couldn't get any results.
You have a few choices. You can add one or more buttons to your custom cell. You can attach a tap gesture recognizer to your cell's content view.
Probably the easiest way to respond to a tap on the whole cell is to have view controller conform to the UITableViewDelegate protocol and implement the tableView(_:didSelectRowAt:) method.
That method will be called when the user selects a cell, and you would use the indexPath of the tapped cell to figure out which one was tapped and do whatever is appropriate.
You can do that with easy and efficient way using Delegate in Swift
//create protocol as we used interface in Java
#objc protocol TableViewCellDelegate {
#objc func click(indexPath: IndexPath?)
}
// Modify your class CustomCell as:
#IBOutlet weak var dogView: UIView!
#IBOutlet weak var nameLabel: UILabel!
#IBOutlet weak var foodImageView: UIImageView!
var delegate: TableViewCellDelegate?
var indexPath: IndexPath?
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(imageTapped(tapGestureRecognizer:)))
foodImageView.isUserInteractionEnabled = true
foodImageView.addGestureRecognizer(tapGestureRecognizer)
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
#objc func imageTapped(tapGestureRecognizer: UITapGestureRecognizer) {
let tappedImage = tapGestureRecognizer.view as! UIImageView
self.delegate.click?(indexPath: self.indexPath)
}
// Modify your tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) in ViewController1 as
let cell = FoodView.dequeueReusableCell(withIdentifier: "CustomCell") as! CustomCell
cell.delegate = self
cell.indexPath = indexPath
let dogfood = dogfoods[indexPath.row]
cell.foodImageView.image = UIImage(named: dogfood)
cell.nameLabel.text = dogfood
return cell
// And now add extension add the end of ViewController1
extension ViewController1: TableViewCellDelegate {
func click(indexPath: IndexPath?) {
// open image for preview here
}
}
You can do it in many ways
use a add a UITableViewDelegate method which is
override func tableView(_ tableView: UITableView, didSelectRowAt
indexPath: IndexPath){
//your code...
}
it will called every time when cell clicked.
if you prefer to trigger any button click rather then cell click then go for delegate (Izaan Saleem already explained), or you can use NotificationCenter, but for this task I prefer didSelect or delegate solution.
I can't figure out how to solve this. It keeps throwing an error with the dequeneResuableCell. I've tried every variable available. I have xcode 6. I removed the outlets, because they are not the problem and I have not included the constructor/iniitalization for the HospitalList class.
This is the code
import UIKit
class HospitalList: UIViewController {
#IBOutlet weak var hospitals: UITableView!
var Hos: [Hospital] = []
override func viewDidLoad() {
super.viewDidLoad()
Hos = createArray()
hospitals.delegate = self
hospitals.dataSource = self
}
func createArray() -> [Hospital] {
\\more code to create an array of Information
return tempHospitals
}
}
extension HospitalList: UITableViewDelegate, UITableViewDataSource {
//counts number of elements in Table View
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return Hos.count
}
//sets up whats in the table view
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let Hop = Hos[indexPath.row]
// this line is the problem right here
let cell = tableView.dequeueReusableCell(withIdentifier: "InfoHospitals")
cell.HName.text = Hop.name \\and more, but not including
return cell
}
return UITableViewCell
}
I have a UITableView and my prototype cell consists of a label and a TextField. I also have a class MyClass that contains functions func1, func2, fun3, ... I have several ViewControllers that use the same tableViewCell prototype. Each viewController will have an instance of MyClass, called inst1, inst2, and inst3. When I enter text into FirstViewController's TableView I want each row to call a function from the instance of MyClass that corresponds to the row.
So when I enter text into row 1 on the FirstViewController I want to pass the data entered into the textField into func1 of inst1. When data is entered into row 2 of FirstViewController I want the data in the textfield to be passed into func2 of inst1. And so on and so forth down the rows.
I am very new to this and would really appreciate some help figuring out how to do this. Let me know if that doesn't make sense and I can try to rephrase it. I really need help with this. Thanks in advance!
*Updated question to show my code
Below is my Code:
FirstViewController.swift
extension FirstViewController: MyCellDelegate {
func MyCell(_ cell: UITableViewCell, didEnterText text: String) {
if let indexPath = tableView.indexPath(for: cell) {
if (indexPath.hashValue == 0) {
inst1.func1(one: text)
}
if (indexPath.hashValue == 1) {
inst1.func2(two: text)
}
}
totalText.text = inst1.getMyTotal()
}
}
import UIKit
class FirstViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
let inst1 = MyClass()
#IBOutlet weak var totalText: UILabel!
#IBOutlet weak var tableView: UITableView!
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 11
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "myTableCell") as! TableViewCell
let text = cell.cellData[indexPath.row]
cell.myTextField.tag = indexPath.row
cell.delegate = self
cell.myLabel.text = text
cell.myTextField.placeholder = text
return cell
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func viewDidLoad() {
super.viewDidLoad()
tableView.dataSource = self
tableView.delegate = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
TableViewCell.swift
import UIKit
protocol MyCellDelegate: class {
func MyCell(_ cell: UITableViewCell, didEnterText text: String)
}
class TableViewCell: UITableViewCell {
weak var delegate: MyCellDelegate?
public var cellData: [String] = ["1","2","3","4","5","6","7","8","9","10","11"]
#IBOutlet weak var myLabel: UILabel!
#IBOutlet weak var myTextField: UITextField!
override func awakeFromNib() {
super.awakeFromNib()
}
override func setSelected(_ selected: Bool, animated: Bool) {
}
}
When I set a breakpoint in the FirstViewController extension it never runs that code.
In WillDisplayCell add the tag to the UITextField. Also create a protocol to notify the Corrosponding viewController and set itself as the delegate here.
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
let cell = tableView.dequeueReusableCell(withIdentifier: "reuseIdentifier")
cell.textField.tag = indexPath.row
cell.delegate = self
}
The protocol in your cell class will look something like this
protocol MyCellDelegate: class {
func MyCell(_ cell: UITableViewCell, didEnterText text: String)
}
class MyCell: UITableViewCell, UITextFieldDelegate {
weak var delegate: MyCellDelegate?
override fun awakeFromNib() {
super.awakeFromNib()
textField.delegate = self
}
//All the remaining code goes here
func textFieldShouldReturn(_ textField: UITextField) -> Bool { //delegate method
textField.resignFirstResponder()
delegate?.MyCell(self, didEnterText: textField.text! )
return true
}
}
Now again in your FirstViewController which has conformed to be its delegate do this
extension FirstViewController: MyCellDelegate {
func MyCell(_ cell: UITableViewCell, didEnterText text: String) {
if let indexPath = tableView.indexPathForCell(cell) {
// call whichever method you want to call based on index path
}
}
Iam trying to use UISearchBar but it's not working with me
here's my code
class searchViewController: UIViewController , UITableViewDataSource , UISearchBarDelegate{
var searchResults = [String]()
#IBOutlet weak var searchTable: UITableView!
#IBOutlet weak var mySearchBar: UISearchBar!
override func viewDidLoad() {
super.viewDidLoad()
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return searchResults.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = searchTable.dequeueReusableCellWithIdentifier("searchCell", forIndexPath: indexPath) as! UITableViewCell
return cell
}
func searchBarSearchButtonClicked(searchBar: UISearchBar) {
print("print anything ")
}
func searchBarTextDidBeginEditing(searchBar: UISearchBar) {
print(self.mySearchBar.text)
}
}
when i click in the search button in the keyboard using simulator no thing is happen
i tried searchBarTextDidBeginEditing it's not working too
did i do something wrong ?
Your code is fine, but you need to set mySearchBar.delegate = self or you could do it on the storyboard, using ctrl+drag the search bar to the viewController and choosing delegate.
I was also facing the same issue, just include UISearchBarDelegate with UIViewController issue resolved.
every one.
After lots of search and different test my code doesn't work yet...
I try to do a simple UITableView with a simple Prototype cell whit using "dequeueReusableCellWithIdentifier" but this function doesn't found my Prototype Cell.
My code :
import Foundation
import UIKit
class DanceClubViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet weak var tableViewSound: UITableView!
override func viewDidLoad()
{
super.viewDidLoad()
self.tableViewSound.registerClass(UITableViewCell.self, forCellReuseIdentifier: "cellVote")
self.tableViewSound.dataSource = self
self.tableViewSound.delegate = self
self.tableViewSound.reloadData()
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
}
#IBAction func backToViewPlay(sender: AnyObject) {
self.navigationController?.popToRootViewControllerAnimated(true)
}
func tableView(tableView:UITableView, numberOfRowsInSection section:Int)->Int
{
return 10
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
var cell : UITableViewCell = self.tableViewSound.dequeueReusableCellWithIdentifier("cellVote") as UITableViewCell
return cell
}
If anyone had already had this problem?
The identifier for my Prototype Cell is : cellVote
The key to address your label is to create a custom TableViewCell class in another file:
import UIKit
class DanceCell: UITableViewCell {
#IBOutlet weak var num: UILabel! //connect the label
}
Then for your ViewController:
import Foundation
import UIKit
class DanceClubViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet weak var tableViewSound: UITableView!
override func viewDidLoad()
{
super.viewDidLoad()
self.tableViewSound.dataSource = self
self.tableViewSound.delegate = self
self.tableViewSound.reloadData()
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
}
#IBAction func backToViewPlay(sender: AnyObject) {
self.navigationController?.popToRootViewControllerAnimated(true)
}
func tableView(tableViewSound:UITableView, numberOfRowsInSection section:Int)->Int
{
return 10
}
func tableView(tableViewSound: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
let cell = tableViewSound.dequeueReusableCellWithIdentifier("cellVote", forIndexPath: indexPath) as DanceCell
cell.num.text = "Hello"
return cell
}
}
I removed some stuff, and added he key line in the 'cellForRowAtIndexPath' function to register the cell. I then was able to communicate with the label. Make sure the prototype cell has set 'cellVote' as the identifier in at attributes inspector.