swift中的核心数据数组

Question

大家好，我有一个问题。看了很多视频后，我不明白如何使用Core Data 来存储数组。

我有一个应用程序，我在视图中放置了 16 TextLabel。我需要使用Core Data 来存储字符串列表。当我启动程序时，我需要从数组中加载数据。但有时我需要用文本字段中的文本更改一个TextLabel 的数据，然后重新加载所有16 个文本标签。

有人可以帮我写代码吗？

抱歉，我不明白它是如何工作的。

我已经使用核心数据创建了项目。 非常感谢

Answer 1

第一个建议：用tags 的标签替换所有网点。这将产生更少的代码，从而更具可读性。您可以使用方便的循环来填写标签。

例如，您的“主要”标签可能有标签 10-17，
您的“次要”标签可能有标签 20-27。

要获得特定标签，只需使用

let label = view.viewWithTag(20) as! UILabel

其次，对于存储 16 个字符串的数组，请使用 NSUserDefaults，它更简单，并且专为这种数据量和类型而构建。

NSUserDefaults.standardUserDefaults().setObject(array, forKey: "myArray")

Answer 2

这是我的代码。在此视图中，我想使用数组设置所有 16 个文本标签。当我按下这些文本标签之一下的按钮时，我需要使用 granigliatoreTF 中的字符串更改数据，然后重新加载所有 16 个文本标签。我只实现了一个按钮开始。谢谢大家

导入 UIKit 导入核心数据

类 DisposizioneGranigliatori: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {

var disposizione = [NSManagedObject]()

@IBOutlet var granigliatoreTF: UITextField!
@IBOutlet var principale1LB: UILabel!
@IBOutlet var principale2LB: UILabel!
@IBOutlet var principale3LB: UILabel!
@IBOutlet var principale4LB: UILabel!
@IBOutlet var principale5LB: UILabel!
@IBOutlet var principale6LB: UILabel!
@IBOutlet var principale7LB: UILabel!
@IBOutlet var principale8LB: UILabel!

@IBOutlet var secondario1LB: UILabel!
@IBOutlet var secondario2LB: UILabel!
@IBOutlet var secondario3LB: UILabel!
@IBOutlet var secondario4LB: UILabel!
@IBOutlet var secondario5LB: UILabel!
@IBOutlet var secondario6LB: UILabel!
@IBOutlet var secondario7LB: UILabel!
@IBOutlet var secondario8LB: UILabel!

@IBOutlet var modifiche: UIView!

@IBOutlet weak var picker: UIPickerView!

var pickerData : [[String]] = [[String]]()

override func viewDidLoad() {
    super.viewDidLoad()

    modifiche.hidden = true


    pickerData = [["12","161","164","165","176","177","245","246","247","250","255","256","262","263","266","267","268","269","270","271","274","275","278","287","289","290","293","301","303","306","307","308","328","330","336","337","340","344","346","347","352","355","357","374","377","381","383","387","391","394","395","399","400","401","403","417","421","423","430","F365","TGF 2666","FTS 2061"],["00","0,09","0,10","0,12","0,12-00","1400","Z","0,14-0,12","0,14","0,16","0,18","0,21","0,25","0,31","0,40","0,52","0,71"]]

    self.picker.delegate = self
    self.picker.dataSource = self

}

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

// The number of columns of data
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
    return pickerData.count
}

// The number of rows of data
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
    return pickerData[component].count
}

// The data to return for the row and component (column) that's being passed in
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
    return pickerData[component][row]
}

}


@IBAction func bigbagPrinc1(sender: AnyObject) {
}

@IBAction func bigbagSec1(sender: AnyObject) {
}

}