ios Swift - 使用 NSUserDefaults 保存高分
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/25269686/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Swift - Saving highscore using NSUserDefaults
提问by user2397282
I'm using Swift to make a game. I want to save the users high score using NSUserDefaults. I know how to create a new NSUserDefaults variable in my AppDelegate file:
我正在使用 Swift 制作游戏。我想使用 NSUserDefaults 保存用户的高分。我知道如何在我的 AppDelegate 文件中创建一个新的 NSUserDefaults 变量：
let highscore: NSUserDefaults = NSUserDefaults.standardUserDefaults()
But how do I set/get this in my view controllers?
但是如何在我的视图控制器中设置/获取它？
回答by beeef
At first, NSUserDefaults is a dictionary (NSDictionary I think). Every app has its own user defaults, so you cannot access the user defaults from any other app.
起初， NSUserDefaults 是一个字典（我认为是 NSDictionary）。每个应用程序都有自己的用户默认值，因此您无法从任何其他应用程序访问用户默认值。
If the user (the one who plays your game) makes a new highscore, you have to save that highscore like this:
如果用户（玩你游戏的人）创造了一个新的高分，你必须像这样保存这个高分：
let highscore = 1000
let userDefaults = NSUserDefaults.standardUserDefaults()
userDefaults.setValue(highscore, forKey: "highscore")
userDefaults.synchronize() // don't forget this!!!!
Then, when you want to get the best highscore the user made, you have to "read" the highscore from the dictionary like this:
然后，当您想获得用户制作的最佳高分时，您必须像这样从字典中“读取”高分：
if let highscore = userDefaults.valueForKey("highscore") {
// do something here when a highscore exists
}
else {
// no highscore exists
}
回答by Ashok R
In Swift 3.0
在 Swift 3.0 中
let highScore = 1000
let userDefults = UserDefaults.standard //returns shared defaults object.
Saving:
保存：
userDefults.set(highScore, forKey: "highScore") //Sets the value of the specified default key to the specified integer value.
retrieving:
检索：
if let highScore = userDefults.value(forKey: "highScore") { //Returns the integer value associated with the specified key.
//do something here when a highscore exists
} else {
//no highscore exists
}
回答by Mithra Singam
Swift 4
斯威夫特 4
Set Value
设定值
UserDefaults.standard.set("TEST", forKey: "Key")//setString
UserDefaults.standard.set("TEST", forKey: "Key")//设置字符串
Retrieve
取回
UserDefaults.standard.string(forKey: "Key")//getString
UserDefaults.standard.string(forKey: "Key")//获取字符串
Remove
消除
UserDefaults.standard.removeObject(forKey: "Key")
UserDefaults.standard.removeObject(forKey: "Key")
回答by jigar parmar
var defaults=NSUserDefaults()
var highscore=defaults.integerForKey("highscore")
if(Score>highscore)
{
defaults.setInteger(Score, forKey: "highscore")
}
var highscoreshow=defaults.integerForKey("highscore")
lblHighScore.text="\(highscoreshow)
println("hhScore reported: \(lblHighScore.text)")
lblPlayScore.text="\(Score)"
println("play reported: \(lblPlayScore.text)")
回答by Alvaro Fernandez Arjona
You can use below piece of code:
您可以使用以下代码：
// Your score var
var score:Int = 0
//save
score = NSUserDefaults.standardUserDefaults().setInteger(score, forKey: "score")
// load without starting value nil problems
if NSUserDefaults.standardUserDefaults().setIntergerForKey:("score") != nil {
score = NSUserDefaults.standardUserDefaults().setIntergerForKey:("score")
}
