swift 国际化，app内部中英语言切换

重点是app 内部切换

1.配置languege.strings.infoPist.Strings





2.LocalizationTool.swift，实现内部切换

//
//  LocalizationTool.swift
//  IFXY
//
//  Created by LiuXing on 2017/3/7.
//  Copyright © 2017年 IFly. All rights reserved.
//

import UIKit

class LocalizationTool: NSObject {
static let shareInstance = LocalizationTool()

let def = UserDefaults.standard
var bundle : Bundle?

func valueWithKey(key: String!) -> String {
let bundle = LocalizationTool.shareInstance.bundle
let str = bundle?.localizedString(forKey: key, value: nil, table: "Language")
return str!
}
//    class func valueWithKey(key: String!) -> String {
//
//        let languageString = SynthesizerSettingTool.shareIntance.vocieParams?.languageType
//        let path = Bundle.main.path(forResource: languageString!, ofType: "lproj")
//        let value = (Bundle.init(path: path!)?.localizedString(forKey: key, value: nil, table: "Language"))!
//        return value
//    }

func setLanguage(langeuage:String) {
var str=langeuage
if langeuage=="" || langeuage==nil{

let languages:[String]=UserDefaults.standard.object(forKey: "AppleLanguages") as! [String]
let str2:String=languages[0]
if ((str2=="zh-Hans-CN")||(str2=="zh-Hans")){
str="zh-Hans"
}else{
str="en"
}

}
UserDefaults.standard.set(str, forKey: "langeuage")
UserDefaults.standard.synchronize()
let path = Bundle.main.path(forResource:str , ofType: "lproj")
bundle = Bundle(path: path!)
//          def.set(langeuage, forKey: UserLanguage)
//          def.synchronize()
NotificationCenter.default.post(name: NSNotification.Name(rawValue: "LanguageChanged"), object: nil)

}
}

3.在appdelegate里面     

var languege:String=""
//        guard languege==UserDefaults.standard.value(forKey: "langeuage") as! String else{
//               languege=""
//        }
if  (UserDefaults.standard.value(forKey: "langeuage")) != nil {
languege=UserDefaults.standard.value(forKey: "langeuage") as! String
}
LocalizationTool.shareInstance.setLanguage(langeuage: languege)

4.语言切换界面

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

tableView.deselectRow(at: indexPath, animated: false)
selectCol = indexPath.row
tableView.reloadData()
if   indexPath.row == 0 {

LocalizationTool.shareInstance.setLanguage(langeuage: "zh-Hans")
}  else {

LocalizationTool.shareInstance.setLanguage(langeuage: "en")
}

}

点击切换语言之后，需要立即修改之前缓存的页面

 

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

页面所有的viewdidload方法里面加上监听

 

func changeLanguage(){
items = [["title": LocalizationTool.shareInstance.valueWithKey(key: "my_language_zh")],["title": LocalizationTool.shareInstance.valueWithKey(key: "trans_title_en")]]
self.title = LocalizationTool.shareInstance.valueWithKey(key: "my_language_switch")//"切换语言"

if (UserDefaults.standard.value(forKey: "langeuage") as! String) == "en"{ // 英语
selectCol = 1
} else {
selectCol = 0
}
m_TableView.reloadData()
}

tip:日期选择器

fileprivate lazy var datePicker:UIDatePicker = {[unowned self] in
let datePic = UIDatePicker()
datePic.backgroundColor = UIColor.white
let languege=UserDefaults.standard.value(forKey: "langeuage") as! String
var sexstr=UserAccountTool.shareIntance.account?.sex
if languege=="en" {
          datePic.locale = Locale(identifier: "en")

 }else{
datePic.locale = Locale(identifier: "zh_CN")
}
//        datePic.locale = Locale(identifier: "zh_CN")
return datePic

}()