IOS如何解析xml检索元素放入数组并在UITableView中显示

Question

- (void)viewDidLoad {
    [super viewDidLoad];
    NSLog(@"Response recieved");
    output= [[NSMutableArray alloc] init];
    //    NSString *severity = @"Informational";
    NSString *soapMessage = @"<?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>"
                            " <IncidentGetList xmlns=\"https://www.monitoredsecurity.com/\">"
                             "<Severity></Severity>"
                             "<SourceOrganization></SourceOrganization>"
                             "<DestinationOrganization></DestinationOrganization>"
                            "<MaxIncidents></MaxIncidents>"
                             "<SourceIP></SourceIP>"
                             "<Category></Category>"
                             "<ExcludeCategory></ExcludeCategory>"
                             "<StartTimeStampGMT></StartTimeStampGMT>"
                             "<EndTimeStampGMT></EndTimeStampGMT>"
                             "<CustomerSeverity></CustomerSeverity>"
                             "</IncidentGetList>"
                             "</soap:Body>"
                             "</soap:Envelope>";

    NSURL *url = [NSURL URLWithString:@"https://api.monitoredsecurity.com/SWS/incidents.asmx"];
    NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
    NSString *msgLength = [NSString stringWithFormat:@"%d", [soapMessage length]];

    [theRequest addValue: @"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
    [theRequest addValue: @"https://www.monitoredsecurity.com/IncidentGetList" forHTTPHeaderField:@"SOAPAction"];
    [theRequest addValue: msgLength forHTTPHeaderField:@"Content-Length"];
    [theRequest setHTTPMethod:@"POST"];
    [theRequest setHTTPBody: [soapMessage dataUsingEncoding:NSUTF8StringEncoding]];

    NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
    [connection start];

    if(connection)
    {
        webResponseData = [NSMutableData data] ;
    }
    else
    {
        NSLog(@"Connection is NULL");
    }

    // Menu View
    // Uncomment the following line to preserve selection between presentations.
    // self.clearsSelectionOnViewWillAppear = NO;

    // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
    // self.navigationItem.rightBarButtonItem = self.editButtonItem;
    // Insert Navigation Bar

    //    [self insertNavBarWithScreenName:SCREEN_INCIDENT];
    //    
    //    CGRect frm = btnDownArrow.frame;
    //    frm.origin.x = 185;
    //    frm.origin.y = 42;
    //    [btnDownArrow setFrame:frm];
    //    [self.navBarView addSubview:btnDownArrow];
    //    
    //   
    //    
    //    [self addGestureRecognizersToPiece:self.view];
}

- (void)connection:(NSURLConnection *) connection didReceiveResponse:(NSURLResponse *)response
{
    NSLog(@"Response recieved");
    [self.webResponseData  setLength:0];
}

- (void)connection:(NSURLConnection*) connection didReceiveData:(NSData *)data
{
    NSLog(@"Data recieved");

    // NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    [self.webResponseData  appendData:data];

    // NSLog(responseString);
    // [response setText:responseString];

    //[status setText:@"Response retrieved async"];
}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection {
    NSLog(@"Received %lu Bytes", (unsigned long)[webResponseData length]);
    NSString *theXML = [[NSString alloc] initWithBytes:
                        [webResponseData mutableBytes] length:[webResponseData length] encoding:NSUTF8StringEncoding];

    NSLog(@"%@",theXML);

    //now parsing the xml
    NSData *myData = [theXML dataUsingEncoding:NSUTF8StringEncoding];

    NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithData:myData];

    //setting delegate of XML parser to self
    xmlParser.delegate = self;
    [xmlParser parse];
    // Run the parser
    @try{
        BOOL parsingResult = [xmlParser parse];
        NSLog(@"parsing result = %hhd",parsingResult);
    }
    @catch (NSException* exception)
    {
        UIAlertView* alert = [[UIAlertView alloc]initWithTitle:@"Server Error" message:[exception reason] delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
        [alert show];
        return;
    }
}

//Implement the NSXmlParserDelegate methods
-(void) parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName
  namespaceURI:(NSString *)namespaceURI qualifiedName:
(NSString *)qName attributes:(NSDictionary *)attributeDict
{
    //currentElement = elementName;
    currentElement = [elementName copy];
    strCaptured = [[NSMutableString alloc] init];
    if ([currentElement isEqualToString:@"Severity"]) {
        item = [[NSMutableDictionary alloc] init];
        NSLog(@"Log Output%@",[item objectForKey:@"Severity"]);
    }

    currentElement = elementName;

    //NSLog(@"current element: ", elementName);
}
- (void)parserDidStartDocument:(NSXMLParser *)parser{
    NSLog(@"File found and parsing started");

}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    [strCaptured appendString:string];
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName
  namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
    if ([currentElement isEqualToString:@"Severity  "]) {
        [output addObject:[item copy]];
    } else {
        [item setObject:strCaptured forKey:elementName];
    }
}
- (void)parserDidEndDocument:(NSXMLParser *)parser {

    if (errorParsing == NO)
    {
        NSLog(@"XML processing done!");
    } else {
        NSLog(@"Error occurred during XML processing");
    }

}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{

// Row display. Implementers should *always* try to reuse cells by setting each cell's reuseIdentifier and querying for available reusable cells with dequeueReusableCellWithIdentifier:
// Cell gets various attributes set automatically based on table (separators) and data source (accessory views, editing controls)
    return [output count];

}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

static NSString *cellId = @"cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"UITableViewCell"];
    if(cell == nil){
        cell= [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellId];
    }

    cell.textLabel.text= [output objectAtIndex:indexPath.row];
    return cell;
}

Answer 1

在 NSObject 中创建一个文件，然后在解析中使用方法

- (void)parserDidStartDocument:(NSXMLParser *)parser
  {
  }

- (void) parser: (NSXMLParser *) parser parseErrorOccurred: (NSError *) parseError {
}

- (void) parser: (NSXMLParser *) parser didStartElement: (NSString *) elementName
  namespaceURI: (NSString *) namespaceURI qualifiedName: (NSString *) qName
  attributes: (NSDictionary *) attributeDict{
}

- (void) parser: (NSXMLParser *) parser didEndElement: (NSString *) elementName namespaceURI: (NSString *) namespaceURI
  qualifiedName: (NSString *) qName{


if ([elementName isEqualToString:@"webResponseData"])
{
    [communication addObject:[currentElement stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]];   
}
currentElement = nil;   
}

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

if(!currentElement)
    currentElement = [[NSMutableString alloc] initWithString:string];
else
    [currentElement appendString:string];
}

然后在 viewcontroller 中的 connectiondidfinishloading 导入解析器文件并制作文件示例的对象：-

NSString *responseStringCommunication=[[NSString alloc]initWithData:MutableData encoding:NSUTF8StringEncoding];

Parser *parser=[[Parser alloc]init];

NSMutableArray *array=[parser parse:responseStringCommunication];