Swift-->NSUserDefaults键值对,Android中的SharedPreferences

IOS中,有4种数据存储的方法:
1:NSKeyedArchiver与NSKeyedUnarchiver存档 http://www.52php.cn/article/p-qayqvimm-mt.html
2:CoreData数据库 http://www.52php.cn/article/p-uneagzdx-mt.html
3:File存储 http://www.52php.cn/article/p-sahioxsn-bek.html
4:NSUserDefaults键值对,就是本文要介绍的.

使用方法非常简单:

let Defaults = NSUserDefaults.standardUserDefaults()
let boolKey = "boolKey"
let floatKey = "floatKey"
let doubleKey = "doubleKey"
let objectKey = "objectKey"
let intKey = "intKey"

//保存数据
func setData() {
    Defaults.setBool(true,forKey: boolKey)
    Defaults.setFloat(3.14159265358979323846,forKey: floatKey)
    Defaults.setDouble(1.41414249812398467213441255598776,forKey: doubleKey)
    Defaults.setObject("Json String ...",forKey: objectKey)
    Defaults.setInteger(19991111,forKey: intKey)
}

//读取数据
func getData() {
    print("(Defaults.boolForKey(boolKey))")
    print("(Defaults.floatForKey(floatKey))")
    print("(Defaults.doubleForKey(doubleKey))")
    print("(Defaults.objectForKey(objectKey))")
    print("(Defaults.integerForKey(intKey))")
}

数据会保存在: (APP根目录)/Library/Preferences/(项目包名).plist 文件中

类似这样的:

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