Beginning Objective-C pdf - EBook Free Download

182CHAPTER 6: Networking: Connections, Data, and the Cloud- (void)parser:(NSXMLParser*)parser foundCDATA:(NSData*)CDATABlock{if ( [CDATABlock length] == 0 )return;}NSString *str = [[NSString alloc] initWithData:CDATABlockencoding:NSUTF8StringEncoding];[self parser:parser foundCharacters:str];The handling of elements’ start and end tags is a little more involved, but ultimately stillfairly simple to understand. An important consideration is that any element names thatcontain hyphens will not be usable as-is; you could replace hyphens with underscores,but I have chosen to convert them to CamelCase to match the rest of the methoddefinition. You can see an implementation of this in Listing 6-13.Listing 6-13. Handling Element Start and End Tags- (NSString*)selectorCleanNameForElementName:(NSString*)elementName{NSMutableString *selStr = [NSMutableString new];@autoreleasepool {// ensure the first character of the element name is uppercased[selStr appendString: [[elementName substringToIndex:1] uppercaseString]];// append the rest of the string (provided it's not 1-character long)if ( [elementName length] > 1 )[selStr appendString: [elementName substringFromIndex:1]];}// handle hyphens properlyNSRange range = [selStr rangeOfString:@"-"];for ( ; range.location != NSNotFound; range = [selStr rangeOfString:@"-"] ){NSString *cap = [[selStr substringWithRange:NSMakeRange(range.location+1,1)]uppercaseString];range.length += 1;[selStr replaceCharactersInRange:range withString:cap];}}return ( selStr );- (void)parser:(NSXMLParser*)parser didStartElement:(NSString*)elementNamenamespaceURI:(NSString*)namespaceURI qualifiedName:(NSString*)qNameattributes:(NSDictionary*)attributes{@autoreleasepool {NSString *cleanName = [self selectorCleanNameForElementName:elementName];NSString *selStr = [NSString stringWithFormat:@"start%@WithAttributes:",cleanName];www.it-ebooks.info