openUDID&strUUID.m

- (NSString *)openUDID{
    if (_openUDID == nil  || [_openUDID isEqualToString:@""]) {
        
        KNKeychainItemWrapper *wrapper = [[KNKeychainItemWrapper alloc] initWithIdentifier:@"kn.openUdid"accessGroup:nil];
        // 读测试
        NSString *openUDID = [wrapper  objectForKey:(__bridge id)kSecValueData];
        
        NSLog(@"读出_openUDID:%@",openUDID);
        if (openUDID == nil || [openUDID isEqualToString:@""])
        {
            openUDID = [OpenUDID value];
            // 如果是模拟器
            if (TARGET_IPHONE_SIMULATOR){
                
            }else{
                
                [wrapper setObject:openUDID forKey:(__bridge id)kSecValueData];
            }
            NSLog(@"写入_openUDID:%@",openUDID);
        }
        _openUDID = openUDID;
        NSLog(@"_openUDID:%@", openUDID);
        
    }
    return _openUDID;
    
}
//存储设备ID的例子
//    是否刷机/还原    是否卸载重装APP    获取方式及优先级
//    否             是               KeyChain、Safari Cookie、iCloud、IDFA、IDFV、NSUUID
- (NSString *)strUUID{
    if (_strUUID == nil || [_strUUID isEqualToString:@""]) {
        
        KNKeychainItemWrapper *wrapper = [[KNKeychainItemWrapper alloc] initWithIdentifier:@"kn_keyid"accessGroup:nil];
        // 读测试
        NSString *strMD5 = [wrapper  objectForKey:(__bridge id)kSecAttrAccount];
        
        NSLog(@"读出md5:%@",strMD5);
        if (strMD5 == nil || [strMD5 isEqualToString:@""])
        {
            strMD5 = [MD5Generator MD5];
            // 如果是模拟器
            if (TARGET_IPHONE_SIMULATOR){
            }else{
                
                [wrapper setObject:strMD5 forKey:(__bridge id)kSecAttrAccount];
            }
            
            
            NSLog(@"写入MD5:%@",strMD5);
        }
        _strUUID = strMD5;
        NSLog(@"strUUID:%@", strMD5);
    }    
    return _strUUID;
}