Question

我是iOS新手，我遇到了将核心数据与网络服务同步的问题。我的网络服务就像这样

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>

这是我如何在核心数据中保存数据

   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Web服务同步，然后将其从核心数据中删除，然后将另一个值从同步中删除。

如何将核心数据同步到Web服务。任何人都这样做了。在此先感谢！

Answer 1

您可以使用AFNetworking框架来处理解析JSON数据或XML数据的所有网络相关操作。要解析XML数据，您可以看到this回答。

有关AFNetworking的详细信息，请参阅this。

修改按照this教程了解如何将核心数据发布到服务器。

Answer 2

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

在这种情况下，它更适合在循环中使用NSManagedObject作为对象并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.
    }

如何在目标c中将核心数据对象同步到Web服务

2 个答案: