下午好,我有问题,希望你能告诉我。首先,如果有人提出这样的问题我会道歉,我想不会,但仍然会原谅新手的错误
我正在做的项目是一个带有两个控制器的TabBarViewController。 一个基本上能够捕获条形码并使用条形码调用Web服务来从服务器获取项目。那个项目然后想要在另一个控制器上显示。
我的问题是我不知道如何将检索到的项目传递给我的自定义UITableViewController,或者这是实现此目的的最佳方法。
这是能够捕获条形码并连接到Web服务的界面
#import <UIKit/UIKit.h>
#import "MBProgressHUD.h"
#import "ListaItemsViewController.h"
@interface ViewController : UIViewController < ZBarReaderDelegate,NSXMLParserDelegate >
{
IBOutlet UILabel * resultText;
ListaItemsViewController * listaItemsViewController;
MBProgressHUD * HUD;
NSMutableData * xmlData;
//neccesary to parse the possible error
NSMutableString * faultString;
BOOL esperandoFaultString;
//neccesary to parse message from logIn and logOut methods webservice
BOOL esperandoReturn;
NSMutableString * returnString;
//neccesary to parse and save an item
BOOL esperandoItem;
BOOL esperandoDescripcionItem;
BOOL esperandoPrecioItem;
BOOL esperandoNumTotalItem;
NSMutableString * descripcionItem;
NSMutableString * precioItem;
NSMutableString * numeroTotalItem;
NSXMLParser * parser;
}
@property (nonatomic,strong) MBProgressHUD * HUD;
@property (nonatomic, retain) IBOutlet UILabel * resultText;
@property(nonatomic,strong) NSMutableData * xmlData;
@property(nonatomic,strong) NSMutableString * faultString;
@property(nonatomic,strong) NSMutableString * returnString;
@property(nonatomic,strong) NSMutableString * descripcionItem;
@property(nonatomic,strong) NSMutableString * precioItem;
@property(nonatomic,strong) NSMutableString * numeroTotalItem;
@property(nonatomic,strong) NSXMLParser * parser;
@property(nonatomic,strong) ListaItemsViewController * listaItemsViewController;
- (IBAction) scanButtonTapped;
- (IBAction)esconderTeclado:(id)sender;
- (IBAction)mostrarTeclado:(id)sender;
@end
这是界面
#import <UIKit/UIKit.h>
@interface ListaItemsViewController : UITableViewController
{
// the item list
NSMutableArray * listaItems;
}
@property(nonatomic,strong) NSMutableArray * listaItems;
@end
这是实施文件:
#import "ListaItemsViewController.h"
#import "CaracteristicasItemViewController.h"
@implementation ListaItemsViewController
@synthesize listaItems;
- (id)initWithStyle:(UITableViewStyle)style
{
NSLog(@"ListaItemsViewController. initWithStyle...");
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
NSLog(@"ListaItemsViewController. viewDidLoad...");
**//how do i create this item list with the items passed via web service?**
listaItems = [[NSMutableArray alloc] initWithObjects:@"item1",@"item2",@"item3", nil];
[super viewDidLoad];
self.navigationItem.rightBarButtonItem = self.editButtonItem;
}
- (void)viewDidUnload
{
[super viewDidUnload];
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
}
- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
NSLog(@"[listaItems count]: %d",[listaItems count]);
return [listaItems count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"celda";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// Configure the cell...
cell.textLabel.text = [listaItems objectAtIndex:[indexPath row]];
cell.detailTextLabel.text = [listaItems objectAtIndex:[indexPath row]];
NSLog(@"cell: %@",cell.textLabel.text);
return cell;
}
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle: (UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
**when i try to delete some row, the app crash, check!!**
NSLog(@"commitEditingStyle...");
[tableView beginUpdates];
if (editingStyle == UITableViewCellEditingStyleDelete)
{
// Delete the row from the data source
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
//[listaItems delete:[NSArray arrayWithObject:indexPath]];
}
[tableView endUpdates];
NSLog(@"end commitEditingStyle...");
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Navigation logic may go here. Create and push another view controller.
NSLog(@"didSelectRowAtIndexPath indexPath.row: %d",indexPath.row);
CaracteristicasItemViewController *caracteristicas = [[CaracteristicasItemViewController alloc] initWithNibName:@"CaracteristicasItemViewController" bundle:Nil];
[self.navigationController pushViewController:caracteristicas animated:YES];
}
@end
实现这一目标的最佳方式是最佳做法?
再次,对不起,如果这对你们来说太容易了,但我刚开始使用这项技术。 此致
答案 0 :(得分:0)
如果您只想删除没有动画的行,您只需从数据源数组listaItems
中删除该条目,然后在表格上执行-reloadData
。
答案 1 :(得分:0)
您还可以查看UITableView方法:
- (void)deleteRowsAtIndexPaths: (NSIndexPath) indexPath withRowAnimation: (UITableViewRowAnimation)animation;
答案 2 :(得分:0)
从我收集的内容和ViewController.h文件中的给定信息,您的ViewController有一个名为listaItemsViewController的ListaItemsViewController的瞬间。 ListaItemsViewController中有一个名为listaItems的iVar,因此您可以将检索到的项目分配给listaItems(在您实例化listaItemsViewController即时之后:
listaItemsViewController.listaItems = retrieveItems; // or self.retrieveItems where retrievedItems is the array of items that you have retrieved from the web server.
不幸的是,我无法弄清楚你使用哪个变量。