如何解决NSXmlparser没有进入iphone中的did start element方法
| 我有一个基于XML的应用程序。我已经编写了所有代码来进行xml解析，但是主要的问题是我的解析器没有进入didStartElement
didStartElement
foundCharacters
didEndElement
#import <Foundation/Foundation.h>
@interface api : NSObject {
NSError *error;
NSURLResponse *response;
NSData *dataReply;
}
@property (nonatomic,retain)NSData *dataReply;
-(NSData *)getBusXMLAtStop:(NSString*)stopnumber;
@end
#import \"api.h\"
@implementation api
@synthesize dataReply;
//@synthesize stringReply;
-(NSData *)getBusXMLAtStop:(NSString*)stopnumber
{
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:
[NSURL URLWithString: [NSString stringWithFormat:@\"http://www.google.com/ig/api?weather=,50500000,30500000\",stopnumber]]];
[request setHTTPMethod: @\"GET\"];
dataReply = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSLog(@\"%@\",dataReply);
return dataReply;
}
-(void)dealloc
{
[super dealloc];
[dataReply release];
}
@end
#import \"TWeatherElement.h\"//this is the class where the elements are Created
#import <Foundation/Foundation.h>
@interface TWeatherParser : NSObject<NSXMLParserDelegate>
{
NSMutableArray *mParserArray;//this is the array i have in the parser class to hold the elements
NSXMLParser *mXmlParser;
NSMutableString *mCurrentElement;
BOOL elementFound;
TWeatherElement *mWeatherobj;
}
@property (nonatomic,retain) NSMutableString *currentElement;
@property (nonatomic,retain)NSMutableArray *mParserArray;
@property (nonatomic,retain) TWeatherElement *weatherobj;
-(void)getInitialiseWithData:(NSData *)inData;
@end
#import \"TWeatherParser.h\"
#import \"JourneyAppDelegate.h\"
#import \"api.h\"
@implementation TWeatherParser
@synthesize weatherobj = mWeatherobj;
@synthesize currentElement = mCurrentElement;
@synthesize mParserArray;
-(void)getInitialiseWithData:(NSData *)inData
{
NSXMLParser *parser = [[NSXMLParser alloc] initWithData:inData];
[parser setDelegate:self];
[parser setShouldProcessNamespaces:NO];
[parser setShouldReportNamespacePrefixes:NO];
[parser setShouldResolveExternalEntities:NO];
[parser parse];
[parser release];
}
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString*) elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString*)qualifiedName attribute:(NSDictionary*)attributeDict
{
if (nil!= qualifiedName)
{
elementName = qualifiedName;
}
if ([elementName isEqualToString:@\"weather\"])
{
[mParserArray addObject:elementName];
self.weatherobj = [[TWeatherElement alloc]init];
}
else if([elementName isEqualToString:@\"current_date_time\"]||
[elementName isEqualToString:@\"condition\"]||
[elementName isEqualToString:@\"humidity\"]||
[elementName isEqualToString:@\"icon d\"]||
[elementName isEqualToString:@\"wind_condition\"]||
[elementName isEqualToString:@\"low\"]||
[elementName isEqualToString:@\"high\"])
{
self.currentElement = [NSMutableString string];
}
else
{
self.currentElement = nil;
}
}
-(void)parser:(NSXMLParser*)parser foundCharacters:(NSString*)string
{
if (nil!= self.currentElement)
{
[self.currentElement appendString:string];
}
}
-(void)parser:(NSXMLParser *)parser didEndElement:(NSString*)elementName namespaceURI:(NSString*)namespaceURI qualifiedName:(NSString*)qName
{
if (nil != qName)
{
elementName = qName;
}
if ([elementName isEqualToString:@\"current_date_time\"])
{
self.weatherobj.currentdate = self.currentElement;
}
else if ([elementName isEqualToString:@\"condition\"])
{
self.weatherobj.conditionname = self.currentElement;
}
else if ([elementName isEqualToString:@\"humidity\"])
{
self.weatherobj.humidity = self.currentElement;
}
else if ([elementName isEqualToString:@\"icon\"])
{
self.weatherobj.icon = self.currentElement;
}
else if ([elementName isEqualToString:@\"wind_condition\"])
{
self.weatherobj.wind = self.currentElement;
}
else if ([elementName isEqualToString:@\"low\"])
{
self.weatherobj.mintemp = self.currentElement;
}
else if ([elementName isEqualToString:@\"high\"])
{
self.weatherobj.maxtemp = self.currentElement;
}
else if ([elementName isEqualToString:@\"weather\"])
{
[mParserArray addObject:self.weatherobj];
NSLog(@\"mDataArray count = %d\",[mParserArray count]);
[self.weatherobj release];
}
}
-(void)dealloc
{
self.weatherobj = nil;
self.currentElement = nil;
[super dealloc];
}
@end
#import <UIKit/UIKit.h>
#import \"TWeatherParser.h\"
@class TWeatherParser;
@interface TWeatherController : UITableViewController {
UITableView *mTableView;
NSMutableArray *mImage;
NSMutableArray *weatherarray;//this is the array that has been created in this class.
TWeatherParser *weather;
}
@property (nonatomic,retain) IBOutlet UITableView *mTableView;
@end
//
// TWeatherController.m
// Journey
//
// Created by raji.nair on 5/3/11.
// Copyright 2011 __MyCompanyName__. All rights reserved.
//
#import \"TWeatherController.h\"
#import \"TWeatherCell.h\"
#import \"TWeatherElement.h\"
#import \"TWeatherParser.h\"
#import \"api.h\"
@implementation TWeatherController
@synthesize mTableView;
#pragma mark -
#pragma mark Initialization
- (id)initWithStyle:(UITableViewStyle)style {
// Override initWithStyle: if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
style = UITableViewStyleGrouped;
if (self = [super initWithStyle:style]) {
}
return self;
}
#pragma mark -
#pragma mark View lifecycle
/*
- (void)viewDidLoad {
[super viewDidLoad];
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
}
*/
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
api *ap = [[api alloc]init];
NSData *aData = [ap getBusXMLAtStop:@\"1\"];
NSString *str = [[NSString alloc] initWithData:aData encoding:NSUTF8StringEncoding];
//NSInteger value = [str intValue];
if (str!= NULL)
{
NSLog(@\"this is success %@\",ap.dataReply);
TWeatherParser *parser = [[TWeatherParser alloc]init];
[parser getInitialiseWithData:ap.dataReply];
[parser release];
}
else
{
UIAlertView *alertview = [[UIAlertView alloc]initWithTitle:@\"Alert\" message:@\"cannot fetch\" delegate:self cancelButtonTitle:@\"OK\" otherButtonTitles:nil];
[alertview show];
[alertview release];
}
[ap release];
}
#pragma mark -
#pragma mark Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
// Return the number of sections.
return 2;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// Return the number of rows in the section.
**return [weather.mParserArray count];**.//Here i am having a doubt that which array should i count over here
}
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @\"Cell\";
TWeatherCell *cell =(TWeatherCell *) [mTableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[TWeatherCell alloc] initWithStyle:UITableViewStyleGrouped reuseIdentifier:CellIdentifier] autorelease];
}
TWeatherElement *newobj = [weather.mParserArray objectAtIndex:indexPath.row];
if ([newobj.icon isEqualToString:@\"http://\\n\"])
{
cell.weatherimage.image = [UIImage imageNamed:@\"listIcon-H.png\"];
}
else {
NSData *imageData = [[NSData alloc]initWithContentsOfURL:[NSURL URLWithString:newobj.icon]];
cell.weatherimage.image = [UIImage imageWithData:imageData];
[imageData release];
}
cell.reportdate.text = newobj.currentdate;
cell.conditionname.text = newobj.conditionname;
cell.twotemp.text = [NSString stringWithFormat:@\"Temp:%@/%@\",newobj.mintemp,newobj.maxtemp];
cell.twodirection.text = newobj.wind;
cell.humidity.text = newobj.humidity;
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
// Configure the cell...
return cell;
}
#pragma mark -
#pragma mark Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[tableView deselectRowAtIndexPath:indexPath animated:YES];
// Navigation logic may go here. Create and push another view controller.
/*
<#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:@\"<#Nib name#>\" bundle:nil];
// ...
// Pass the selected object to the new view controller.
[self.navigationController pushViewController:detailViewController animated:YES];
[detailViewController release];
*/
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *) indexPath
{
return 100.0;
}
#pragma mark -
#pragma mark Memory management
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn\'t have a superview.
[super didReceiveMemoryWarning];
// Relinquish ownership any cached data,images,etc. that aren\'t in use.
}
- (void)viewDidUnload {
// Relinquish ownership of anything that can be recreated in viewDidLoad or on demand.
// For example: self.myOutlet = nil;
}
- (void)dealloc {
[super dealloc];
}
@end
<?xml version=\"1.0\"?><xml_api_reply version=\"1\"><weather module_id=\"0\" tab_id=\"0\" mobile_row=\"0\" mobile_zipped=\"1\" row=\"0\" section=\"0\" ><forecast_information><city data=\"\"/><postal_code data=\"\"/><latitude_e6 data=\"50500000\"/><longitude_e6 data=\"30500000\"/><forecast_date data=\"2011-05-26\"/><current_date_time data=\"2011-05-26 04:00:00 +0000\"/><unit_system data=\"US\"/></forecast_information><current_conditions><condition data=\"Clear\"/><temp_f data=\"52\"/><temp_c data=\"11\"/><humidity data=\"Humidity: 62%\"/><icon data=\"/ig/images/weather/sunny.gif\"/><wind_condition data=\"Wind: NW at 9 mph\"/></current_conditions><forecast_conditions><day_of_week data=\"Thu\"/><low data=\"48\"/><high data=\"68\"/><icon data=\"/ig/images/weather/mostly_sunny.gif\"/><condition data=\"Mostly Sunny\"/></forecast_conditions><forecast_conditions><day_of_week data=\"Fri\"/><low data=\"52\"/><high data=\"75\"/><icon data=\"/ig/images/weather/mostly_sunny.gif\"/><condition data=\"Mostly Sunny\"/></forecast_conditions><forecast_conditions><day_of_week data=\"Sat\"/><low data=\"55\"/><high data=\"81\"/><icon data=\"/ig/images/weather/mostly_sunny.gif\"/><condition data=\"Mostly Sunny\"/></forecast_conditions><forecast_conditions><day_of_week data=\"Sun\"/><low data=\"55\"/><high data=\"86\"/><icon data=\"/ig/images/weather/mostly_sunny.gif\"/><condition data=\"Partly Sunny\"/></forecast_conditions></weather></xml_api_reply>
解决方法
在您的编码中检查这些想法
[xmlParser setDelegate:self];
[xmlParser setShouldProcessNamespaces:NO];
[xmlParser setShouldReportNamespacePrefixes:NO];
[xmlParser setShouldResolveExternalEntities:NO];
[xmlParser parse];
// Your method:
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString*) elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString*)qualifiedName attribute:(NSDictionary*)attributeDict
// NSXMLParserDelegate\'s method:
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict;
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