Passing information to a custom TableViewCell - Swift

问题

The problem is this: I tried many ways to pass down information to a ViewController1 from a SecondViewController. In this first ViewController1 I have a tableView, and in this tableView, each cell will receive an image and a label. What I want to do is, in the SecondViewController, I will write something in a textField and pick some random image and display it in the ViewController1.

Could someone tell me how to do it? I tried delegates, dequeuereusablecell and the data won't display in the cell.

Thanks in advance!

EDIT

here's my code:

ViewController 1:

import UIKit

class FirstViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, sendDataToFVCDelegate {

@IBOutlet var tableView: UITableView!
var labelsListArray = [""]

    override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}


func myVCDidFinish(text: String) {
    labelsListArray.append(text)
    tableView.reloadData()
}

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return labelsListArray.count
}

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let row = indexPath.row
    let textLabel = labelsListArray[row]
    var cell = tableView.dequeueReusableCellWithIdentifier("ImageView") as? CustomCellTableViewCell
    cell!.cellLabel!.text = textLabel
    return cell!
}

}

ViewController 2:

import UIKit

protocol sendDataToFVCDelegate { func myVCDidFinish(text: String) }

class SecondViewController: UIViewController {

var delegate:sendDataToFVCDelegate?
@IBOutlet var textField: UITextField!

override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

@IBAction func addButton(sender: AnyObject) {

    if textField == nil { return }
    let name = textField.text
    println("\(name)")

    if delegate == nil { return }
    delegate?.myVCDidFinish(name)

    if let navigation = self.navigationController {
        navigation.popViewControllerAnimated(true)
    }
}

}

TableViewCell :

import UIKit

class CustomCellTableViewCell: UITableViewCell {

@IBOutlet var cellImage: UIImageView!
@IBOutlet var cellLabel: UILabel!



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
}

}

What am I doing wrong? Now even the line "popViewControllerAnimated" is going back to the first view controller.

Thanks very much for your help!!

回答1:

So your custom TableViewCell should have it's own class (for example ImageTableViewCell) which takes care of the image you will set when loading the TableView:

@IBOutlet var titleLabel: UILabel!
@IBOutlet var imageView: UIImageView!

and in the TableView:

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        var cell = tableView.dequeueReusableCellWithIdentifier("ImageView") as? ImageTableViewCell
        cell!.titleLabel!.text = textFrom2VC
        cell!.imageView.image = imageFrom2VC
        return cell!
}

And you have to get these from the other view with delegate. In the second VC you have

protocol SecondVCDelegate{
    func myVCDidFinish(controller:SecondVC, text: String, image: UIImage)
}

which you call with

    var delegate:SecondVCDelegate.myVCDidFinish(self, text: "this is random text", image: (your image) )

and in the first (which confirms to protocol SecondVCDelegate) you have

func myVCDidFinish(controller: SecondVC, text: String, image: UIImage) {
    textFrom2VC = text
    imageFrom2VC = image
    controller.navigationController?.popViewControllerAnimated(true)
    self.tableView.reloadData()
}

来源：https://stackoverflow.com/questions/30563205/passing-information-to-a-custom-tableviewcell-swift

标签

uitableview

swift

delegates

datasource

tableviewcell