我正在尝试向我的数组(声明为 var)添加一个项目，使用任何可能有效的方法(+=、追加、插入)，但我不断收到错误 ' “AnyObject[]”类型的不可变值只有名为“append”的可变成员。

这里是错误发生的地方:

func testSave(item : NSString, date : NSString){

    itemsArray.append(item) 

更新:这里是完整的代码:

import UIKit

class ToDoListTableViewController: UITableViewController, UITableViewDelegate, UITableViewDataSource, UIAlertViewDelegate {
    var itemsArray = NSUserDefaults .standardUserDefaults().arrayForKey("items")
    var dateArray = NSUserDefaults .standardUserDefaults().arrayForKey("dates")



    override func viewDidLoad() {
        super.viewDidLoad()
        NSUserDefaults .standardUserDefaults().setObject("test", forKey: "items")
        NSUserDefaults .standardUserDefaults().setObject("test", forKey: "dates")

        self.itemsArray = NSUserDefaults .standardUserDefaults().arrayForKey("items")
        self.dateArray = NSUserDefaults .standardUserDefaults().arrayForKey("dates")
        // Uncomment the following line to preserve selection between presentations
        // self.clearsSelectionOnViewWillAppear = false

        // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
        // self.navigationItem.rightBarButtonItem = self.editButtonItem
    }

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

    // #pragma mark - Table view data source

    override func numberOfSectionsInTableView(tableView: UITableView?) -> Int {
        // #warning Potentially incomplete method implementation.
        // Return the number of sections.
        return 1
    }

    override func tableView(tableView: UITableView?, numberOfRowsInSection section: Int) -> Int {
        // Return the number of rows in the section.
        if itemsArray{
            return itemsArray.count}
        else{
            return 0}
    }

    override func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCell!{
        //variable type is inferred
        /*var cell = tableView.dequeueReusableCellWithIdentifier("Cell") as? UITableViewCell

        if !cell {
            cell = UITableViewCell(style: UITableViewCellStyle.Subtitle, reuseIdentifier: "Cell")
        }

        //we know that cell is not empty now so we use ! to force unwrapping
        cell!.textLabel.text = self.itemsArray[indexPath.row] as String
        cell!.detailTextLabel.text = self.dateArray[indexPath.row] as String
        */
        let cell = UITableViewCell(style: UITableViewCellStyle.Subtitle, reuseIdentifier:"Cell")

        if itemsArray{
            println("Working")
        cell.textLabel.text = itemsArray[indexPath.row] as String
        cell.detailTextLabel.text = dateArray[indexPath.row] as String
        }
        return cell
    }


    @IBAction func addItem(sender : UIBarButtonItem) {
        var alert = UIAlertController(title: "Alert", message: "Message", preferredStyle: UIAlertControllerStyle.Alert)
        alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: {(action: UIAlertAction!) in
            var stringText = alert.textFields[0].text
            var dateText = alert.textFields[0].text
            self .testSave(stringText, date: dateText)
            }))
        alert.addTextFieldWithConfigurationHandler(nil)
        self.presentViewController(alert, animated: true, completion: nil)
    }
    func testSave(item : NSString, date : NSString){

        itemsArray.append(item)

       /* NSUserDefaults .standardUserDefaults().setObject(item, forKey: "items")


        /*    NSUserDefaults .standardUserDefaults().setObject(stringText, forKey: "items")
        NSUserDefaults .standardUserDefaults().setObject(dateText, forKey: "dates")
        NSUserDefaults.standardUserDefaults().synchronize()
        */

        self.dateArray = NSUserDefaults .standardUserDefaults().arrayForKey("dates")
        self.tableView .reloadData() */
    }
    func alertviewClick(){

    }

}

最佳答案

这很好用:

var itemsArray = ["one", "two"]
func testSave(item : NSString, date : NSString){

    itemsArray.append(item)
}

testSave("three", "today")
itemsArray

关于ios - 使用 Swift 在 iOS 中将项目添加到数组，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/24128441/