大家好，我正在使用 Hpple 从 Web 获取一些数据并将其显示在表格视图中。我正在使用来自 ray wenderlich 的代码。源代码位于本页底部http://www.raywenderlich.com/14172/how-to-parse-html-on-ios。然后这是我用来获取数据的网站http://ueat.site88.net/output.xml。这是我的 xPathQuery
//day[@name='monday']/meal[@name='LUNCH']/counter[@name='Entrée']/dish/name.
如果我 NSLog 应该在表视图中显示什么，它会获取信息
Tutorial *thisTutorial = [_objects objectAtIndex:indexPath.row];
NSLog(@"%@", thisTutorial.title);
cell.textLabel.text = thisTutorial.title;
但是它没有出现在表格视图中，我知道节点不是零。
这是它显示数据的位置的代码
#import "MasterViewController.h"
#import "DetailViewController.h"
#import "TFHpple.h"
#import "Tutorial.h"
#import "Contributor.h"
@interface MasterViewController () {
NSMutableArray *_objects;
NSMutableArray *_contributors;
}
@end
@implementation MasterViewController
@synthesize detailViewController = _detailViewController;
- (void)loadTutorials {
// 1
NSURL *tutorialsUrl = [NSURL URLWithString:@"http://ueat.site88.net/output.xml"];
NSData *tutorialsHtmlData = [NSData dataWithContentsOfURL:tutorialsUrl];
// 2
TFHpple *tutorialsParser = [TFHpple hppleWithHTMLData:tutorialsHtmlData];
// 3
NSString *tutorialsXpathQueryString = @"//day[@name='monday']/meal[@name='LUNCH']/counter[@name='Entrée']/dish/name";
NSArray *tutorialsNodes = [tutorialsParser searchWithXPathQuery:tutorialsXpathQueryString];
// 4
NSMutableArray *newTutorials = [[NSMutableArray alloc] initWithCapacity:0];
for (TFHppleElement *element in tutorialsNodes) {
// 5
Tutorial *tutorial = [[Tutorial alloc] init];
[newTutorials addObject:tutorial];
// 6
tutorial.title = [[element firstChild] content];
NSLog(@"%@", tutorial.title);
// 7
tutorial.url = [element objectForKey:@"href"];
}
// 8
_objects = newTutorials;
[self.tableView reloadData];
}
/*
- (void)loadContributors {
// 1
NSURL *contributorsUrl = [NSURL URLWithString:@"http://www.raywenderlich.com/about"];
NSData *contributorsHtmlData = [NSData dataWithContentsOfURL:contributorsUrl];
// 2
TFHpple *contributorsParser = [TFHpple hppleWithHTMLData:contributorsHtmlData];
// 3
NSString *contributorsXpathQueryString = @"//ul[@class='team-members']/li";
NSArray *contributorsNodes = [contributorsParser searchWithXPathQuery:contributorsXpathQueryString];
// 4
NSMutableArray *newContributors = [[NSMutableArray alloc] initWithCapacity:0];
for (TFHppleElement *element in contributorsNodes) {
// 5
Contributor *contributor = [[Contributor alloc] init];
[newContributors addObject:contributor];
// 6
for (TFHppleElement *child in element.children) {
if ([child.tagName isEqualToString:@"img"]) {
// 7
@try {
contributor.imageUrl = [@"http://www.raywenderlich.com" stringByAppendingString:[child objectForKey:@"src"]];
}
@catch (NSException *e) {}
} else if ([child.tagName isEqualToString:@"h3"]) {
// 8
contributor.name = [[child firstChild] content];
}
}
}
// 9
_contributors = newContributors;
[self.tableView reloadData];
}
*/
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
self.title = NSLocalizedString(@"Master", @"Master");
}
return self;
}
- (void)viewDidLoad {
[super viewDidLoad];
[self loadTutorials];
// [self loadContributors];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
#pragma mark - Table View
- (NSString*)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
switch (section) {
case 0:
return @"Tutorials";
break;
case 1:
return @"Contributors";
break;
}
return nil;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 2;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
switch (section) {
case 0:
return _objects.count;
break;
case 1:
return _contributors.count;
break;
}
return 0;
}
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
if (indexPath.section == 0) {
Tutorial *thisTutorial = [_objects objectAtIndex:indexPath.row];
NSLog(@"%@", thisTutorial.title);
cell.textLabel.text = thisTutorial.title;
cell.detailTextLabel.text = thisTutorial.url;
} else if (indexPath.section == 1) {
Contributor *thisContributor = [_contributors objectAtIndex:indexPath.row];
cell.textLabel.text = thisContributor.name;
}
return cell;
}
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
[_objects removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
} else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.
}
}
/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
}
*/
/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the item to be re-orderable.
return YES;
}
*/
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (!self.detailViewController) {
self.detailViewController = [[DetailViewController alloc] initWithNibName:@"DetailViewController" bundle:nil];
}
NSDate *object = [_objects objectAtIndex:indexPath.row];
self.detailViewController.detailItem = object;
[self.navigationController pushViewController:self.detailViewController animated:YES];
}
提前感谢您的帮助