XML parsing

XML Parsing

We will parse the highlighted tag data through NSXMLParser

We have declared few properties as follows

@property(nonatomic, strong)NSMutableArray *results;
@property(nonatomic, strong)NSMutableString *parsedString;
@property(nonatomic, strong)NSXMLParser *xmlParser;

//Fetch xml data
NSURLSession *session=[NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];

NSURLSessionDataTask *task=[session dataTaskWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:YOUR_XMLURL]] completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {

self.xmlParser=[[NSXMLParser alloc] initWithData:data];
self.xmlParser.delegate=self;
if([self.xmlParser parse]){
   //If parsing completed successfully

        NSLog(@"%@",self.results);

}

}];

[task resume];

Then we define the NSXMLParserDelegate

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(nullable NSString *)namespaceURI qualifiedName:(nullable NSString *)qName attributes:(NSDictionary<NSString *, NSString *> *)attributeDict{

    if([elementName isEqualToString:@"GeocodeResponse"]){
        self.results=[[NSMutableArray alloc] init];
    }

    if([elementName isEqualToString:@"formatted_address"]){
        self.parsedString=[[NSMutableString alloc] init];
    }

}


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

    if(self.parsedString){
        [self.parsedString appendString:[string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]];
    }


}

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

    if([elementName isEqualToString:@"formatted_address"]){
        [self.results addObject:self.parsedString];

        self.parsedString=nil;
    }

}