ios下得到汉字拼音的方法比较

.使用ZBar项目。下载地址是： http://zbar.sourceforge.net/iphone/index.html

2.新建一个项目。
3.导入 ZBar的sdk。把ZBar SDK的目录拉入项目，然后选中copy选项
4.在项目文件的target中加入 以下framework

5.在appDelegate文件中加入 标记部分的代码
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- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];

// force view class to load so it may be referenced directly from NIB
[ZBarReaderView class];

return YES;
}

注意此代码：
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// force view class to load so it may be referenced directly from NIB
[ZBarReaderView class];

6.在.h文件中加入 ZBarReaderViewDelegate的实现，代码如下:
[cpp] view plaincopy

//
// ViewController.h
// FootSafety
//
// Created by 泽宇 徐 on 12-6-12.
// Copyright (c) 2012年 __MyCompanyName__. All rights reserved.
//

#import <UIKit/UIKit.h>
#import "ZBarSDK.h"

@interface ViewController : UIViewController<ZBarReaderViewDelegate>
{
IBOutlet UILabel * label ;
ZBarReaderView *readerView;
ZBarCameraSimulator *cameraSim;
}

@property(nonatomic,retain) UILabel * label ;
@property (nonatomic, retain) IBOutlet ZBarReaderView *readerView;

@end

7.在.m文件中要实现的主要方法是：

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- (void) readerView: (ZBarReaderView*) view
didReadSymbols: (ZBarSymbolSet*) syms
fromImage: (UIImage*) img
{
// do something useful with results
for(ZBarSymbol *sym in syms) {
self.label.text = sym.data;
break;
}
}

这里是功能是读取照片信息，把条码放如label显示

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-(void) viewDidAppear:(BOOL)animated
{
// run the reader when the view is visible
[readerView start];
}

这个是在显示视图的时候，启动摄像头，开始扫描

[html] view plaincopy

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

// the delegate receives decode results
readerView.readerDelegate = self;

// you can use this to support the simulator
if(TARGET_IPHONE_SIMULATOR) {
cameraSim = [[ZBarCameraSimulator alloc]
initWithViewController: self];
cameraSim.readerView = readerView;
}

}

在初始化的时候，设置托管。

.m文件所有内容是：
[html] view plaincopy

//
// ViewController.m
// FootSafety
//
// Created by 泽宇 徐 on 12-6-12.
// Copyright (c) 2012年 __MyCompanyName__. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController
@synthesize label;
@synthesize readerView;

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

// the delegate receives decode results
readerView.readerDelegate = self;

// you can use this to support the simulator
if(TARGET_IPHONE_SIMULATOR) {
cameraSim = [[ZBarCameraSimulator alloc]
initWithViewController: self];
cameraSim.readerView = readerView;
}

}

-(void) viewDidAppear:(BOOL)animated
{
// run the reader when the view is visible
[readerView start];
}

- (void) readerView: (ZBarReaderView*) view
didReadSymbols: (ZBarSymbolSet*) syms
fromImage: (UIImage*) img
{
// do something useful with results
for(ZBarSymbol *sym in syms) {
self.label.text = sym.data;
break;
}
}

- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

-(void) dealloc
{
[self.readerView release];
[self.label release];
[super dealloc];
}

@end

在ViewController.xib文件中 增加一个view，并且修改view的类是ZBarReaderView ，并且指向 .h文件中定义的
[cpp] view plaincopy

ZBarReaderView *readerView;