数组类型现在用元素类型两边的方括号书写

Question

这是我的代码 (TaskManager.swift)：

import UIKit

var taskMgr: TaskManager = TaskManager ()

struct task {
    var name = "untitled"
    var desc = "none"
}

class TaskManager: NSObject {
    var tasks = task[]()

    func addTask (name: String, desc: String) {
        tasks.append (task (name: name, desc: desc))
    }
}

然后我得到了这个

/Users/David/Documents/360Drive/Xcode/Try/RandomTries/ToDoList/ToDoList/TaskManager.swift:11:21: Array types are now written with the brackets around the element type

它说

Fix-it: Insert "["

我点击了它，然后那一行（第 11 行）变成了这个：

var tasks = [task[]()

我遇到了这些错误

/Users/David/Documents/360Drive/Xcode/Try/RandomTries/ToDoList/ToDoList/TaskManager.swift:11:26: Expected ']' in container literal expression /Users/David/Documents/360Drive/Xcode/Try/RandomTries/ToDoList/ToDoList/TaskManager.swift:11:26: Expected ',' separator /Users/David/Documents/360Drive/Xcode/Try/RandomTries/ToDoList/ToDoList/TaskManager.swift:13:5: Expected expression in container literal /Users/David/Documents/360Drive/Xcode/Try/RandomTries/ToDoList/ToDoList/TaskManager.swift:14:15: Cannot invoke 'append' with an argument list of type '(task)'

感谢您的任何建议！

这是 FirstViewController.swift 中的另外 2 个错误：

/Users/David/Documents/360Drive/Xcode/Try/RandomTries/ToDoList/ToDoList/FirstViewController.swift:21:14: 'text' is unavailable: APIs deprecated as of iOS 7 and earlier are unavailable in Swift /Users/David/Documents/360Drive/Xcode/Try/RandomTries/ToDoList/ToDoList/FirstViewController.swift:22:30: Cannot assign to 'detailTextLabel' in 'cell'

这是代码

import UIKit

class FirstViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

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

    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell: UITableViewCell = UITableViewCell (style: UITableViewCellStyle.Subtitle, reuseIdentifier: "Default")
        cell.textLabel = ""
        cell.detailTextLabel = ""
        //cell.text = taskMgr.tasks[indexPath.row].name
        //cell.detailTextLabel = taskMgr.tasks[indexPath.row].desc
        return cell
    }

}

Answer 1

看起来 Fix-it 搞砸了。 Swift 在类型周围使用方括号。正确的版本是这样的：

var tasks = [task]()

这是shorthand的写法；有一个更长的版本：

var tasks = Array<task>()

但首选 shorthand 版本。

Answer 2

您的语法不正确。任务数组可以这样初始化：-

Var tasks = [Task]()

然后你可以使用附加方法在其中添加"Task"对象。

tasks.append(your Task object)

数组类型现在用元素类型两边的方括号书写

Array types are now written with the brackets around the element type

xcode

syntax-error

ios

swift