红框内可以写你的项目bundleID
要与上面的保持一致
@interface UUID : NSObject + (void)save:(NSString *)service data:(id)data; + (id)load:(NSString *)service; + (void)delete:(NSString *)service; + (NSString *)getUUID; @end #import "UUID.h" @implementation UUID + (NSString *)getUUID { /// 定义存入keychain中的账号 一个标识 表示是某个app存储的内容 bundle id最好. NSString * const KEY_USERNAME = @"com.xxx.xxx.username"; NSString * const KEY_PASSWORD = @"com.xxx.xxx.password"; /// 测试用 清除keychain中的内容. // [UUID delete:KEY_USERNAME_PASSWORD]; /// 读取账号中保存的内容. NSMutableDictionary *readUserDataDic = (NSMutableDictionary *)[UUID load:KEY_USERNAME]; if (!readUserDataDic) {/// 如果是第一次 肯定获取不到 这个时候就存储一个. NSString *deviceIdStr = [[[UIDevice currentDevice] identifierForVendor] UUIDString];///< 获取UUID. //NSLog(@"identifierStr==%@",identifierStr); NSMutableDictionary *needSaveDataDic = [NSMutableDictionary dictionaryWithObject:deviceIdStr forKey:KEY_PASSWORD]; /// 进行存储 并返回这个数据. [UUID save:KEY_USERNAME data:needSaveDataDic]; return deviceIdStr; } else{return [readUserDataDic objectForKey:KEY_PASSWORD];} } /// 储存 + (void)save:(NSString *)service data:(id)data { //Get search dictionary NSMutableDictionary *keychainQuery = [self getKeychainQuery:service]; //Delete old item before add new item SecItemDelete((__bridge CFDictionaryRef)keychainQuery); //Add new object to search dictionary(Attention:the data format) [keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(__bridge id)kSecValueData]; //Add item to keychain with the search dictionary SecItemAdd((__bridge CFDictionaryRef)keychainQuery, NULL); } + (NSMutableDictionary *)getKeychainQuery:(NSString *)service { return [NSMutableDictionary dictionaryWithObjectsAndKeys: (__bridge id)kSecClassGenericPassword,(__bridge id)kSecClass, service, (__bridge id)kSecAttrService, service, (__bridge id)kSecAttrAccount, (__bridge id)kSecAttrAccessibleAfterFirstUnlock,(__bridge id)kSecAttrAccessible, nil]; } /// 取出 + (id)load:(NSString *)service { id ret = nil; NSMutableDictionary *keychainQuery = [self getKeychainQuery:service]; //Configure the search setting //Since in our simple case we are expecting only a single attribute to be returned (the password) we can set the attribute kSecReturnData to kCFBooleanTrue [keychainQuery setObject:(__bridge 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) {NSLog(@"Unarchive of %@ failed: %@", service, e);} @finally {} } if (keyData) CFRelease(keyData); return ret; } /// 删除 + (void)delete:(NSString *)service { NSMutableDictionary *keychainQuery = [self getKeychainQuery:service]; SecItemDelete((__bridge CFDictionaryRef)keychainQuery); } @end
