我正在开发适用于iOS 7的应用,并且正在使用ARC。我正在使用Web服务,因此用户必须使用用户名和密码登录Web服务。我知道只是存储用户名和密码并不好,所以我想使用keychain来存储用户名和密码。
在做了一些研究后,人们似乎建议使用KeychainItemWrapper
,但这与ARC不兼容。如何使用ARC在iOS 7中使用钥匙串存储密码?任何帮助和指导将不胜感激。
答案 0 :(得分:2)
我使用以下内容:
+ (void)keyChainSaveKey:(NSString *)key data:(id)data
{
NSMutableDictionary *keychainQuery = [self getKeychainQuery:key];
SecItemDelete((__bridge CFDictionaryRef)keychainQuery);
[keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(__bridge id)kSecValueData];
SecItemAdd((__bridge CFDictionaryRef)keychainQuery, NULL);
}
+ (id)keyChainLoadKey:(NSString *)key
{
id ret = nil;
NSMutableDictionary *keychainQuery = [self getKeychainQuery:key];
[keychainQuery setObject:(id)kCFBooleanTrue forKey:(__bridge id)kSecReturnData];
[keychainQuery setObject:(__bridge id)kSecMatchLimitOne forKey:(__bridge id)kSecMatchLimit];
CFDataRef keyData = NULL;
if (SecItemCopyMatching((__bridge CFDictionaryRef)keychainQuery, (CFTypeRef *)&keyData) == noErr) {
@try {
ret = [NSKeyedUnarchiver unarchiveObjectWithData:(__bridge NSData *)keyData];
}
@catch (NSException *e) {
//NS Log(@"Unarchive of %@ failed: %@", service, e);
}
@finally {}
}
if (keyData) CFRelease(keyData);
return ret;
}
+ (void)keyChainDeleteKey:(NSString *)service
{
NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
SecItemDelete((__bridge CFDictionaryRef)keychainQuery);
}
//helper
+ (NSMutableDictionary *)getKeychainQuery:(NSString *)key
{
return [NSMutableDictionary dictionaryWithObjectsAndKeys:
(__bridge id)kSecClassGenericPassword, (__bridge id)kSecClass,
key, (__bridge id)kSecAttrService,
key, (__bridge id)kSecAttrAccount,
(__bridge id)kSecAttrAccessibleAfterFirstUnlock, (__bridge id)kSecAttrAccessible,
nil];
}
您可能需要
#import <CommonCrypto/CommonCryptor.h>
我不记得我在哪里找到了这段代码...所以我不能给予信任:(