Question

我能够保存一个整数并使用NSUserdeafaults加载它，但当我加载该数字并尝试继续添加到该数字时，它从0开始。

示例：我按下按钮7次并切换到其他页面。我回去点击加载按钮，然后是第7天。当我再次点击它时，它会显示1。

这是我的＆＃34;按金钱＆＃34;代码：

//按金钱

@IBAction func MoneyPress(sender: AnyObject) {

    Money += 1
    var MoneyNumberString:String = String(format: "Dollars:%i", Money)
    self.DollarsLabel.text = (string: MoneyNumberString)
    let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults() 
    defaults.setObject(MoneyNumberString, forKey: "money")
    defaults.synchronize()

}

加载代码：

@IBAction func LoadTestButton(sender: UIButton) {
        let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
        var money = defaults.valueForKey("money") as? String
        DollarsLabel.text! = money!
}

如果您知道如何继续添加该号码，请提供帮助。

完整代码：

import UIKit

class ViewController: UIViewController {
@IBOutlet weak var MoneyButton: UIButton!
@IBOutlet weak var OptionButton: UIButton!
@IBOutlet weak var FeelingLuckyButton: UIButton!
@IBOutlet weak var TrophiesButton: UIButton!
@IBOutlet weak var DollarsLabel: UILabel!
@IBOutlet weak var BuyNowOne: UIButton!



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.
}
var Money = Int(0)

//Press for Money

@IBAction func MoneyPress(sender: AnyObject) {

    Money += 1
    var MoneyNumberString:String = String(format: "Dollars:%i", Money)
    self.DollarsLabel.text = (string: MoneyNumberString)
    let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults() 
    defaults.setObject(MoneyNumberString, forKey: "money")
    defaults.synchronize()

}
@IBAction func LoadTestButton(sender: UIButton) {
        let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
        var money = defaults.valueForKey("money") as? String
        DollarsLabel.text! = money!
}

}

Answer 1

问题是，当您确实要将Money设置为包含NSUserDefaults中的值时，您将LoadTestButton设置为0。要在@IBAction func LoadTestButton(sender: UIButton) { let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults() var money = defaults.valueForKey("money") as? String DollarsLabel.text! = money! // Set "Money" to contain the numbers in your "money" // string converted to an Int Money = money!.stringByTrimmingCharactersInSet(NSCharacterSet.decimalDigitCharacterSet().invertedSet).toInt()! }方法中执行此操作，请尝试以下操作：

{{1}}

加载并继续添加整数Xcode Swift

1 个答案: