轻量级存储

class ShareData {

static let userDefault = UserDefaults.standard

static var aaaa: String {

get {

return userDefault.string(forKey: "text") ?? "测试默认文字"

}

set(newValue) {

userDefault.setValue(newValue, forKey: "text")

}

}

}

运用:

let str = ShareData.aaaa

ShareData.aaaa = "哈哈哈"

print(str)

let aaa = ShareData.aaaa

print(aaa)