如何在目标 c 中将核心数据对象同步到 Web 服务

Posted 2023-03-04

【中文标题】如何在目标 c 中将核心数据对象同步到 Web 服务

【英文标题】：how to sync core data object to web service in objective c

【发布时间】：2016-12-15 11:48:27

【问题描述】：

我是 ios 新手，在将核心数据与 Web 服务同步时遇到了问题。我的网络服务是这样的

POST /webservice.asmx HTTP/1.1
Host: Url
Content-Type: text/xml; charset=utf-8
Content-Length: length
SOAPAction: "http://tempuri.org/Method"

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <Method xmlns="http://tempuri.org/">
      <key1>int</key1>
      <key2>long</key2>
      <key3>long</key3>
      <key4>long</key4>
      <key5>long</key5>
      <key6>long</key6>
      <key7>long</key7>
      <key8>long</key8>
      <key9>long</key9>
    </Method>
  </soap:Body>
</soap:Envelope>

这就是我在核心数据中保存数据的方式

   NSManagedObjectContext *context = [self managedObjectContext];

                if (self.device) 
                    // Update existing device
                    [device setValue:Audit forKey:@"Key1"];
                    [device setValue:MethodID forKey:@"Key2"];
                    [device setValue:CheckPointID forKey:@"Key3"];
                    [device setValue:GlobalStringChk forKey:@"Key4"];
                    [device setValue:RegionID forKey:@"Key5"];
                    [device setValue:BranchID forKey:@"Key6"];
                    [device setValue:SiteID forKey:@"Key7"];
                    [device setValue:AuID forKey:@"Key8"];
                    [device setValue:userid forKey:@"Key9"];

                 else 
                    // Create a new device
                    NSManagedObject *newDevice = [NSEntityDescription insertNewObjectForEntityForName:@"Entity Name" inManagedObjectContext:context];
                    [newDevice setValue:Audit forKey:@"Key1"];
                    [newDevice setValue:MethodID forKey:@"Key2"];
                    [newDevice setValue:CheckPointID forKey:@"Key3"];
                    [newDevice setValue:GlobalStringChk forKey:@"Key4"];
                    [newDevice setValue:RegionID forKey:@"Key5"];
                    [newDevice setValue:BranchID forKey:@"Key6"];
                    [newDevice setValue:SiteID forKey:@"Key7"];
                    [newDevice setValue:AuID forKey:@"Key8"];
                    [newDevice setValue:userid forKey:@"Key9"];
                



                NSError *error = nil;
                // Save the object to persistent store
                if (![context save:&error]) 
                    NSLog(@"Can't Save! %@ %@", error, [error localizedDescription]);
                

 NSManagedObjectContext *managedObjectContext = [self managedObjectContext];
            NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] initWithEntityName:@"Entity Name"];
            self.devices = [[managedObjectContext executeFetchRequest:fetchRequest error:nil] mutableCopy];

这就是我通常使用代码将数据发布到 Web 服务的方式

    -(void)serverconnectionPost

        NSString *MethodString =@"?op=Method";
        NSString *ServerfullString =[NSString stringWithFormat:@"%@%@",ServerString,MethodString];

        int auid=0;
        long regionid=[RegionID longLongValue];
        long branch=[BranchID longLongValue];
        long site=[SiteID longLongValue];
        long auditnameid=[AuditNameId longLongValue];
        long checkpoint=[CheckPointID longLongValue];
        long methodofmeasume=[MethodID longLongValue];
        long rdbchecklist=[RDBIDCheckListID longLongValue];
        long UserId=[userid longLongValue];

        NSString *soapMessage = [NSString stringWithFormat:@"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
                                 "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">"
                                 "<soap:Body>"
                                 "<Method xmlns=\"http://tempuri.org/\">"
                                 "<Key1>%d</Key1>"
                                 "<Key2>%ld</Key2>"
                                 "<Key3>%ld</Key3>"
                                 "<Key4>%ld</Key4>"
                                 "<Key5>%ld</Key5>"
                                 "<Key6>%ld</Key6>"
                                 "<Key7>%ld</Key7>"
                                 "<Key8>%ld</Key8>"
                                 "<Key9>%ld</Key9>"
                                 "</Method>"
                                 "</soap:Body>"
                                 "</soap:Envelope>",auid,regionid,branch,site,auditnameid,checkpoint,methodofmeasume,rdbchecklist,UserId];

        NSData *postData = [soapMessage dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];

        NSString *postLength = [NSString stringWithFormat:@"%lu",(unsigned long)[soapMessage length]];
        NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
        [request setURL:[NSURL URLWithString:ServerfullString]];
        [request setHTTPMethod:@"POST"];
        [request addValue: @"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
        [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
        NSLog(@"URL = %@",request);
        [request setHTTPBody:postData];
        myNSUConnectionPOSTObj = [[NSURLConnection alloc] initWithRequest:request delegate:self];
        NSLog(@"Connection link =%@",myNSUConnectionPOSTObj);
        if(myNSUConnectionPOSTObj) 
            myNSMDataFromPOSTServer =[[NSMutableData alloc] init];
            NSLog(@"Connection Successful");

         else 
            NSLog(@"Connection could not be made");
        
    

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
 [myNSMDataFromPOSTServer setLength:0];

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
[myNSMDataFromPOSTServer appendData:data];

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
 NSXMLParser *myNSXMLParserPostObj=[[NSXMLParser alloc]initWithData:myNSMDataFromPOSTServer];
        myNSXMLParserPostObj.delegate=self;
        [myNSXMLParserPostObj parse];
        NSLog(@"%@",myNSXMLParserPostObj.parserError);
        NSString *responseStringWithEncoded = [[NSString alloc] initWithData: myNSMDataFromPOSTServer encoding:NSUTF8StringEncoding];
        //NSLog(@"Response from Server : %@", responseStringWithEncoded);
        NSAttributedString * attrStr = [[NSAttributedString alloc] initWithData:[responseStringWithEncoded dataUsingEncoding:NSUnicodeStringEncoding] options:@ NSDocumentTypeDocumentAttribute: NShtmlTextDocumentType  documentAttributes:nil error:nil];
        serverResponse.attributedText = attrStr;
        NSString *Str =serverResponse.text;
        NSLog(@"Server Response =%@",Str);
        alert3 = [[UIAlertView alloc] initWithTitle:@"Message to display"
                                            message:Str
                                           delegate:self
                                  cancelButtonTitle:@"OK"
                                  otherButtonTitles:nil];

        [alert3 show];

-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string

  myMutableStringPOSTObj=[[NSMutableString alloc]initWithString:string];
    NSLog(@"Array String: %@",myMutableStringPOSTObj);
    NSData *dataPost = [myMutableStringPOSTObj dataUsingEncoding:NSUTF8StringEncoding];
    responsePOSTdict = [NSJSONSerialization JSONObjectWithData:dataPost options:0 error:nil];
    NSLog(@"JSON DATA = %@",responsePOSTdict);


-(IBAction)joinbtnClick:(id)sender

    [self serverconnectionPost];
   

注意 - ServerString 包含 Web 服务的 url。

我需要将一个值与网络服务同步，然后将其从核心数据中删除，然后再像同步一样将另一个值删除。

如何将核心数据同步到网络服务。有人做过吗？提前致谢！

【问题讨论】：

你为什么不使用AFNetworking框架来发布数据？它非常简单，可以处理所有需要的场景。

@VishalSonawane 我正在使用 XMLParsing，AFNetworking 用于 JSON 解析。我不确定当我搜索时我得到 AFNNetworking for JSON Parsing。

请检查我的回答。

【参考方案1】：

您可以使用AFNetworking 框架来处理所有与网络相关的操作，无论是解析JSON 数据还是XML 数据。要解析XML 数据，您可以查看this 答案。

有关 AFNetworking 的更多信息，请参阅this。

编辑： 按照this 教程了解如何将核心数据发布到服务器。

【讨论】：

感谢您的回复。我可以发布数据。我想要有关如何将核心数据对象同步到 Web 服务的代码或提示。

【参考方案2】：

如果设备来自 Core Data，它不能包含 NSString。它是 NSManagedObject 或 NSDictionary。我猜是 NSManagedObject。

在这种情况下，更适合使用 NSManagedObject 作为循环中的对象，分别获取九个键的值：

 for (NSManagedObject *object in devices) 

        NSSString *string1 = [object valueForKey:@"key1"];
        NSSString *string2 = [object valueForKey:@"key2"];
        NSSString *string3 = [object valueForKey:@"key3"];
        NSSString *string4 = [object valueForKey:@"key4"];
        NSSString *string5 = [object valueForKey:@"key5"];
        NSSString *string6 = [object valueForKey:@"key6"];
        NSSString *string7 = [object valueForKey:@"key7"];
        NSSString *string8 = [object valueForKey:@"key8"];
        NSSString *string9 = [object valueForKey:@"key9"];
        // use the strings

//Hear call your method...It will send value one by one to web service.