iphone app国际化实现

说明：依系统设定的源码自动切换适合的显示字串
操作：
在Interface Builder中设计时的介面
若系统设定为英文则显示英文介面
若系统设定为繁体中文则显示为中文介面
如何建立自定的语系档：
1，在Resources分类下新增档案 [右键/Add/New File...]
2，在范本的分类选择Other后再选择Strings File
3。将存档档名设定为Localizable.strings
4。在Localizable.strings档案上按右键并选择Get Info
5，选择左下方的Make File Localizable
6。将分页标签切换至General
7。选择左下方的Add Localization
8。input;新的语系名称zh_TW后按Add
9，您会看到目前您设定了English及zh_TW两种语系
10。在档案清单中您将看到Localizable Strings (English) 及 Localizable String (zh_TW)
11开启后编辑源码字串就可以啰，范例如下：
Localizable.strings (English)
/*
   Localizable.strings
   MultiLanguageDemo

   Created by babyfish0226 on 2009/3/6.
   Copyright 2009 __MyCompanyName__. All rights reserved.
*/

"DemoTitle"="This is English Version";
"String1"="Apple";
"String2"="BAnana";
"String3"="Orange";
"String4"="Watermelon";
"String5"="Strawberry";

Localizable.strings (zh_TW)
/*
   Localizable.strings
   MultiLanguageDemo

   Created by babyfish0226 on 2009/3/6.
   Copyright 2009 __MyCompanyName__. All rights reserved.
*/
"DemoTitle"="這是繁體中文的版本";
"String1"="苹果";
"String2"="香蕉";
"String3"="橘子";
"String4"="西瓜";
"String5"="草莓";

代码：
MultiLanguageDemoViewController.h
//
//  MultiLanguageDemoViewController.h
//  MultiLanguageDemo
//
//  Created by babyfish0226 on 2009/3/6.
//  Copyright __MyCompanyName__ 2009. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface MultiLanguageDemoViewController : UIViewController {
        IBOutlet UILabel *lbldemotitle;
        IBOutlet UILabel *lblstr1;
        IBOutlet UILabel *lblstr2;
        IBOutlet UILabel *lblstr3;
        IBOutlet UILabel *lblstr4;
        IBOutlet UILabel *lblstr5;
}

@property (nonatomic,retain) UILabel *lbldemotitle;
@property (nonatomic,retain) UILabel *lblstr1;
@property (nonatomic,retain) UILabel *lblstr2;
@property (nonatomic,retain) UILabel *lblstr3;
@property (nonatomic,retain) UILabel *lblstr4;
@property (nonatomic,retain) UILabel *lblstr5;

@end


MultiLanguageDemoViewController.m
#import "MultiLanguageDemoViewController.h"

@implementation MultiLanguageDemoViewController

@synthesize lbldemotitle,lblstr1,lblstr2,lblstr3,lblstr4,lblstr5;

- (void)viewDidLoad {
    [super viewDidLoad];
       
        //系统设定取得适合的多国语言字串
        lbldemotitle.text=NSLocalizedString(@"DemoTitle",nil);
        lblstr1.text= NSLocalizedString(@"String1",nil);
        lblstr2.text=NSLocalizedString(@"String2",nil);
        lblstr3.text=NSLocalizedString(@"String3",nil);
        lblstr4.text=NSLocalizedString(@"String4",nil);
        lblstr5.text=NSLocalizedString(@"String5",nil);       
}