使用结构和数组在表视图之间传递数据(Swift : Xcode)

Question

我是一个代码初学者，实际上我几周前就加入了这个世界。我正在尝试使用Xcode和Swift为Ios构建我的第一个应用程序。我想创建不同的表视图并在这些表之间传递数据。

现在，我编写了代码，但一直收到“预期声明”错误。我真的不知道怎么解决这个问题。有人能帮帮我吗？谢谢。

//
//  ViewController.swift
//  Tot_Forum
//
//  Created by Fausto Saltetti on 18/07/16.
//  Copyright (c) 2016 Fausto Saltetti. All rights reserved.
//

import UIKit

class FirtTableViewController: UITableViewController {

var FirstTableArray = [String]()

var SecondArray = [SecondTable]()

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    FirstTableArray = ["Focus on learning", "Participate and network", "Access and build knowledge", "Assess, reflect, evaluate", "Inspire and generate ideas", "Problem solve and plan", "Map ideas and relationships"]

    SecondArray =
        [SecondTable(SecondTitle: ["After Action Review","Audience Response Systems","Blogs","Case Studies", "Discussion Forums UPDATE","Jigsaw","Peer Assist", "Podcasting","Presentations", "Role Play", "Screencasting", "Social Networking", "Sociometrics"]),
            SecondTable(SecondTitle: ["After Action Review","Audience Response Systems","Blogs","Case Studies", "Discussion Forums UPDATE","Jigsaw","Peer Assist", "Podcasting","Presentations", "Role Play", "Screencasting", "Social Networking", "Sociometrics"]),
            SecondTable(SecondTitle: ["After Action Review","Audience Response Systems","Blogs","Case Studies", "Discussion Forums UPDATE","Jigsaw","Peer Assist", "Podcasting","Presentations", "Role Play", "Screencasting", "Social Networking", "Sociometrics"])]

}

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

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

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    var Cell = self.tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! UITableViewCell

    Cell.textLabel?.text = FirstTableArray[indexPath.row]

    return Cell

     func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

        var indexPath : NSIndexPath = self.tableView.indexPathForSelectedRow()!

        var DestViewController = segue.destinationViewController as! SecondTableViewController

        var SecondTableArrayTwo : SecondTable

        SecondTableArrayTwo = SecondArray[indexPath.row]

        DestViewController.SecondArray = SecondTableArrayTwo.SecondTitle
        }

}   **//Error here: !Expected declaration**

Answer 1

这里的错误是您的cellForRowAtIndexPath函数中的prepareForSegue函数。

它们应该在全局范围内

var SecondTableArrayTwo : SecondTable？它的init应该是未包装的或者是可选的。

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    var Cell = self.tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! UITableViewCell
    Cell.textLabel?.text = FirstTableArray[indexPath.row]
    return Cell
}  

func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        var indexPath : NSIndexPath = self.tableView.indexPathForSelectedRow()!
        var DestViewController = segue.destinationViewController as! SecondTableViewController
        var SecondTableArrayTwo : SecondTable?
        SecondTableArrayTwo = SecondArray[indexPath.row]
        DestViewController.SecondArray = SecondTableArrayTwo!.SecondTitle
}

Answer 2

从你得到的错误开始，“预期声明”错误是因为你的类中缺少大括号"}“。

解决此错误将给您另一个警告，因为在return语句之后编写的代码永远不会执行。您已经在返回语句之后编写了prepareForSegue函数。

现在主要的问题是，prepareForSegue必须在全球范围内，就像@Özgür Ersil在他的回答中提到的那样。因此，为您的类添加一个右大括号。从cellForRowAtIndexPath函数中删除prepareForSegue函数，并在类内的全局范围内编写它。

希望本文能对您有所帮助:)