iOS Keychain KeychainItemWrapper And SFHFKeychainUtils

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对于一些私密信息，比如密码、证书等等，就需要使用更为安全的keychain了。keychain里保存的信息不会因App被删除而丢失，在用户重新安装App后依然有效，数据还在。

1.在网上下载SFHFKeychainUtils 或者KeychainItemWrapper 代码，简单浏览一下 (demo下载地址 http://download.csdn.net/detail/u011715727/8217941 )

主要是存储，删除，获取这个闭合流程。只测试了模拟器，可以不需要Security.framework，真机需要正确有效的Bundle identifier.

2.代码：初始化

KeychainItemWrapper 需要新建一个KeychainAccessGroups.plist文件,结构如下：

Root Dictionary

keychain-access-groups Array

item0 string YOUR_APP_ID_HERE.com.youcompany.KeychainDemo

加入 Security.framework

appdelegate.m

#import "KeychainItemWrapper.h"

KeychainItemWrapper *passwordWrapper = [[KeychainItemWrapper alloc] initWithIdentifier:@"Password" accessGroup:nil];

KeychainItemWrapper *accountWrapper = [[KeychainItemWrapper alloc] initWithIdentifier:@"Account Number" accessGroup:@"YOUR_APP_ID_HERE.com.youcompany.KeychainDemo"];

你需要调用的.m文件

#import "SFHFKeychainUtils.h"

#import "KeychainItemWrapper.h"

#define ServiceName @"com.youcompany.KeychainDemo"

......{

KeychainItemWrapper *accountItem_keyChain;

KeychainItemWrapper *passwordItem_keyChain;

}

a. 存储

//方法一

[accountItem_keyChain setObject:userNameTextField.text forKey:kSecAttrAccount];

[passwordItem_keyChain setObject:userPasscodeTextField.text forKey:kSecValueData];

//方法二

[SFHFKeychainUtils storeUsername:@"userName" andPassword:userNameTextField.text forServiceName:ServiceName updateExisting:@"" error:nil];

[SFHFKeychainUtils storeUsername:@"userPassword" andPassword:userPasscodeTextField.text forServiceName:ServiceName updateExisting:@"" error:nil];

b.删除

//方法一

[accountItem_keyChain resetKeychainItem];

[passwordItem_keyChain resetKeychainItem];

//方法二

[SFHFKeychainUtils deleteItemForUsername:@"userName" andServiceName:ServiceName error:nil];

[SFHFKeychainUtils deleteItemForUsername:@"userPassword" andServiceName:ServiceName error:nil];

c.获取

NSString *nameString;

NSString *passwordString;

//方法一

nameString = [accountItem_keyChain objectForKey:kSecAttrAccount];

passwordString = [passwordItem_keyChain objectForKey:kSecValueData];

//方法二

nameString = [SFHFKeychainUtils getPasswordForUsername:@"userName" andServiceName:ServiceName error:nil];

passwordString = [SFHFKeychainUtils getPasswordForUsername:@"userPassword" andServiceName:ServiceName error:nil];

完毕，如有错误，早点请指正，减少误导。

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