swift 国际化，app内部中英语言切换_swift app 怎么区分国内外

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
        
    }()