swift - 跨 .swift 文件传输用户默认值

Question

我想在应用程序实用程序文件中设置用户默认值，并在我想要的任何 View Controller 中调用它们。这是今天的小部件:

import UIKit
import NotificationCenter

class TodayViewController: UIViewController, NCWidgetProviding {

@IBOutlet weak var BitCount: UILabel!
@IBOutlet weak var upCost: UILabel!

var Bits:Double = defualts.double(forKey: "bits")
var bitsPerClick:Double = defualts.double(forKey: "bitsPerClick")
var upgradePrice:Double =  defualts.double(forKey: "upgradeCost")

//Click bit
@IBAction func Click(_ sender: Any) {
    AppUtility().bitClick()
    BitCount.text = "\(Bits)"
}

//Click Upgrade
@IBAction func Upgrade(_ sender: Any) {
    AppUtility().upgradeClick()
        upCost.text = "Cost \(upgradePrice)"
        BitCount.text = "\(Bits)"
}

这是应用实用程序:

import Foundation
import UIKit

let defualts = UserDefaults.standard

var Bits:Double = defualts.double(forKey: "bits")
var bitsPerClick:Double = defualts.double(forKey: "bitsPerClick")
var upgradePrice:Double =  defualts.double(forKey: "upgradeCost")

class AppUtility: UIViewController {

public func setDefualts() {
defualts.set(0, forKey: "bits")

defualts.set(1, forKey: "bitsPerClick")

defualts.set(10, forKey: "upgradeCost")
}

public func upgradeClick() {

    if Bits >= upgradePrice {
        Bits = Bits - upgradePrice
        bitsPerClick = bitsPerClick + 1
        upgradePrice = upgradePrice * 1.5
    }
}
public func bitClick() {
    Bits = Bits + bitsPerClick
}
}

当我运行代码时，我的所有标签都显示为空白，因此我假设用户默认值未设置或未正确调用

Answer 1

您将值存储为整数，但将它们读取为 double 值。

改变

 defualts.set(1, forKey: "bitsPerClick")

到

 defualts.set(1.0, forKey: "bitsPerClick")

或将它们读作整数

var bitsPerClick:Int = defualts.integer(forKey: "bitsPerClick")