swift----- 国际化之app内切换语言

�1. 首先创建个工程不说了。。。。。。。。

2. 创建一个Strings File 命名为 Localizable.strings

3.选择Localizable.strings文件 点击localizaiton 选择english

4, 选择项目 info 添加语言

选择 Chinese(simplified)为例， 去掉main.storyboard和LaunchScreen.storyboard选项

发现Localizable.strings 多了两个文件，这就是多语言配置文件

中文配置文件（注意后边要有分号）

英文配置文件 （注意后边要有分号）

接下来就代码啦~~~~~~~

1.创建一个LanguageHelper.swift   ，这个类包含设置语言，获取语言，初始化

import UIKit

let UserLanguage = "UserLanguage"

let AppleLanguages = "AppleLanguages"

class LanguageHelper: NSObject {

static let shareInstance = LanguageHelper()

let def = UserDefaults.standard

var bundle : Bundle?

class func getString(key:String) -> String{

let bundle = LanguageHelper.shareInstance.bundle

let str = bundle?.localizedString(forKey: key, value: nil, table: nil)

return str!

}

func initUserLanguage() {

var string:String = def.value(forKey: UserLanguage) as! String? ?? ""

if string == "" {

let languages = def.object(forKey: AppleLanguages) as? NSArray

if languages?.count != 0 {

let current = languages?.object(at: 0) as? String

if current != nil {

string = current!

def.set(current, forKey: UserLanguage)

def.synchronize()

}

}

}

string = string.replacingOccurrences(of: "-CN", with: "")

string = string.replacingOccurrences(of: "-US", with: "")

var path = Bundle.main.path(forResource:string , ofType: "lproj")

if path == nil {

path = Bundle.main.path(forResource:"en" , ofType: "lproj")

}

bundle = Bundle(path: path!)

}

func setLanguage(langeuage:String) {

let path = Bundle.main.path(forResource:langeuage , ofType: "lproj")

bundle = Bundle(path: path!)

def.set(langeuage, forKey: UserLanguage)

def.synchronize()

}

}

2.在appdelegate中第一次打开程序初始化程序语言

LanguageHelper.shareInstance.initUserLanguage()

3.添加修改语言通知

NotificationCenter.default.addObserver(self, selector: #selector(ViewController.changeLanguage), name: NSNotification.Name(rawValue: "LanguageChanged"), object: nil)

整页代码：自己研究去吧~~~~~~~

import UIKit

class ViewController: UIViewController {

var lab: UILabel?

override func viewDidLoad() {

super.viewDidLoad()

self.view.backgroundColor = UIColor.white

NotificationCenter.default.addObserver(self, selector: #selector(ViewController.changeLanguage), name: NSNotification.Name(rawValue: "LanguageChanged"), object: nil)

let button = UIButton(frame:CGRect(x:10, y:150, width:50, height:50))

button.addTarget(self, action: #selector(ViewController.changelangage2), for: UIControlEvents.touchUpInside)

self.view.addSubview(button)

button.backgroundColor = UIColor.red

let button2 = UIButton(frame:CGRect(x:100, y:150, width:100, height:30))

button2.addTarget(self, action: #selector(ViewController.changelangage), for: UIControlEvents.touchUpInside)

self.view.addSubview(button2)

button2.backgroundColor = UIColor.green

lab = UILabel.init(frame: .init(x: 10, y: 100, width: 300, height: 20))

self.view.addSubview(lab!)

//        lab.text = NSLocalizedString("GOOD_MORNING",comment:"default")

lab?.text = LanguageHelper.getString(key: "GOOD_MORNING")

}

func changeLanguage() -> Void {

lab?.text = LanguageHelper.getString(key: "GOOD_MORNING")

}

func changelangage() -> Void {

LanguageHelper.shareInstance.setLanguage(langeuage: "en")

NotificationCenter.default.post(name: NSNotification.Name(rawValue: "LanguageChanged"), object: nil)

}

func changelangage2() -> Void {

LanguageHelper.shareInstance.setLanguage(langeuage: "zh-Hans")

NotificationCenter.default.post(name: NSNotification.Name(rawValue: "LanguageChanged"), object: nil)

}

}

代码传送门：https://github.com/dljike/LanguageChage