I am very new to iOS programming and I am currently trying to use an add button in my navigation bar to add a new row to my table view. Each cell in the table is a custom cell with a UITextfield. When I run my program in the simulator my first cell shows up, but when I try to add another one the tableView becomes a black screen (but the navigation bar still stays on the screen). Please help!
import UIKit
class TrivialDecisionsController: UITableViewController
{
var objects = [listedDecision]()
override func awakeFromNib() {
super.awakeFromNib()
}
override func viewDidLoad()
{
super.viewDidLoad()
self.navigationItem.leftBarButtonItem = self.editButtonItem()
let addButton = UIBarButtonItem(barButtonSystemItem: .Add, target: self, action: "insertNewObject:")
self.navigationItem.rightBarButtonItem = addButton
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func insertNewObject(sender: AnyObject?)
{
let newDecision = tableView.dequeueReusableCellWithIdentifier("trivialDecision") as! listedDecision
newDecision.configure(text: "", placeholder: "Decision Title")
self.objects.insert(newDecision, atIndex:0)
let indexPath = NSIndexPath(forRow: 0, inSection: 0)
self.tableView.insertRowsAtIndexPaths([indexPath], withRowAnimation: .Automatic)
tableView.reloadData()
}
// MARK: - Table View
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// 1
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return objects.count+1
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("trivialDecision") as! listedDecision
//cell.configure(text: "", placeholder: "Enter some text!")
return cell
}
override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
return true
}
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == .Delete {
objects.removeAtIndex(indexPath.row)
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
} else if editingStyle == .Insert {
objects.append(listedDecision())
array, and add a new row to the table view.
}
}
}
Here is the code for my custom Cell as well
import UIKit
class listedDecision: UITableViewCell, UITextFieldDelegate {
@IBOutlet weak var decisionTitle: UITextField!
/*var ID: String
var cellstyle:UITableViewCellStyle*/
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
}
func configure(#text: String?, placeholder: String)
{
decisionTitle.text = text
decisionTitle.placeholder = placeholder
decisionTitle.accessibilityValue = text
decisionTitle.accessibilityLabel = placeholder
}
}
In your code, the lines:
take constant zero. So every time, when you click the button to add new cell, it adds to the row 0. So make it a variable and increment it on every call to insertNewObject.