Question

我是编程新手，有问题。我在tableview中使用解析我的数组。当选择行时，我想在另一个视图控制器上将其设置为textView。 tableview工作正常，但我无法将文本发送到textView。

tableVC：

import UIKit
import Parse
class ThirdTableVC: UITableViewController {
@IBOutlet weak var refresherQuotes: UIRefreshControl!
@IBOutlet var quoteTable: UITableView!

var selectedQuote: PFObject?
var quoteItems = [PFObject]()

override func viewDidLoad() {
    super.viewDidLoad()

}
@IBAction func updateQuotesResults(_ sender: UIRefreshControl) {
    fetchQuotesData()
}

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    loadQuoteTexts(selectedQuote: selectedQuote)
}


override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}

// MARK: - Table view data source

override func numberOfSections(in tableView: UITableView) -> Int {



    return 1
}

override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {



    return quoteItems.count
}

func fetchQuotesData() {
    let quotesQuery = PFQuery(className: "TotalTest")
    quotesQuery.whereKey("Subcategory", equalTo: selectedQuote ?? nil)
    quotesQuery.findObjectsInBackground { (objects, error) in
        if let realCategoryObjects = objects {
            self.quoteItems = realCategoryObjects
            self.tableView.reloadData()
            self.refresherQuotes.endRefreshing()
        }
    }
}


override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let quoteCell = tableView.dequeueReusableCell(withIdentifier: "quoteCell", for: indexPath)

    let quoteItem = quoteItems[indexPath.row]
    let quoteUserTitle = quoteItem.object(forKey: "TextQuote") as? String

    quoteCell.textLabel?.text = quoteUserTitle

    return quoteCell
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "showQuoteDetail" {
        if let indexPath = tableView.indexPathForSelectedRow {
            let quoteobject = quoteItems[indexPath.row] as? NSDate
            let quoteController = (segue.destination as! UINavigationController).topViewController as! DetailViewController
            quoteController.detailItem = quoteobject
            quoteController.navigationItem.leftBarButtonItem = splitViewController?.displayModeButtonItem
            quoteController.navigationItem.leftItemsSupplementBackButton = true
        }
    }
}

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    print("Row tapped: \(indexPath.row)")

    let selectedQuotes: PFObject = quoteItems[indexPath.row]
    let  FourthVC = self.storyboard?.instantiateViewController(withIdentifier: "FourthViewController") as! FourthViewController
    FourthVC.fourthTextView.text = quoteItems[indexPath.row] as? String
    self.navigationController?.pushViewController(FourthVC, animated: true)


}

func loadQuoteTexts(selectedQuote: PFObject!) {

    let quoteQuery = PFQuery(className: "TotalQuote")
    quoteQuery.whereKey("QuoteSubs", equalTo: selectedQuote ?? nil)
    quoteQuery.includeKey("QuoteSubs")

    quoteQuery.findObjectsInBackground { (result: [PFObject]?, error) in
        if let searchQuoteResults = result {

            self.quoteItems = searchQuoteResults
            self.quoteTable.reloadData()
        }
    }   
}
}

我该怎么改变？ viewController with textView：

 import UIKit
 import Parse

 class FourthViewController: UIViewController {

var getQuote: PFObject?

@IBOutlet weak var fourthTextView: UITextView!
@IBOutlet weak var fourthLabel: UILabel!


override func viewDidLoad() {
    super.viewDidLoad()
    fourthLabel.text! = getQuote as! String
    fourthTextView.text! = getQuote as! String 
}
}

请帮我传递短信

Answer 1

问题是您正在使用pushViewController从一个视图更改为另一个视图，这样做prepareForSegue将不会被执行。

在didSelectRow上，您需要致电performSegue(withIdentifier:sender:)。

您可以查看this question以获取有关如何操作的更多信息。

Answer 2

如果你使用pushViewController，就像selectRowAt

那样

desVC.getText = "here goes your text u want to pass"

现在传递你的文字

var getText = String()

FourthViewController 设置你的var

self.navigationController?.pushViewController(desVC, animated: true)

所以你最终可以使用

public interface APIService {

@GET("/temperature")
@Headers({"api-key: "my api key", "code: "my-api-code"})
Call<Post> getTemperature();

因此它将传递您之前使用desVC.getSomething

添加的所有参数在FourthViewController中你只需要使用getText。

从TableVC解析到其他viewController swift中的textView

2 个答案: