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我正在使用包含 3 个选项卡的选项卡栏控制器开发一个演示应用程序。在第一个选项卡中，我使用了一个 Table view controller 。

我在编辑（添加/删除）表格行时遇到问题。我无法在表中添加或删除行。

当我在没有标签栏控件的情况下使用这个表格视图时，我能够修改表格。在这里我分享我的 tableviewcontroller.h 和 .m 文件。

        **tableviewcontroller.h**
        #import <UIKit/UIKit.h>

        @interface TableViewViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>    
        {
               IBOutlet UITableView *tableView1;
               SMutableArray *arry;
               NSString *enteredText;
               UITextField *myTextField;
               NSInteger rowIndex;
            }
        @property(nonatomic,readonly)NSString *enteredText;
        - (IBAction) EditTable:(id)sender;
            @end

            **TableViewViewController.m**
            #import "TableViewViewController.h"
            @implementation TableViewViewController
            @synthesize enteredText;

        - (void)viewDidLoad 
        {
          arry=[[NSMutableArray alloc]initWithObjects:@"iPhone",@"MacMini",@"iMac",@"MacBookProAir",@"MacBookPro",nil];
          self.title = @"Table View ";
          UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithTitle:@"Edit" style:UIBarButtonItemStyleBordered target:self action:@selector(EditTable:)];
          [self.navigationItem setLeftBarButtonItem:addButton];
          [super viewDidLoad];
        }
        - (void)didReceiveMemoryWarning 
        {
          [super didReceiveMemoryWarning]; 
        }
- (void)dealloc 
{
  [super dealloc];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView 
{
  return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 
{
 int count = [arry count];
 if(self.editing) count++;
 return count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
  static NSString *CellIdentifier = @"Cell";
  UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
  if (cell == nil)
  {
    cell = [[[UITableViewCell alloc]initWithFrame:CGRectZero    reuseIdentifier:CellIdentifier]autorelease];
  }
  int count = 0;
  if(self.editing && indexPath.row != 0)
    count = 1;
  if(indexPath.row == ([arry count]) && self.editing)
  {
    cell.textLabel.text = @"ADD";
        return cell;
  }
  cell.textLabel.text = [arry objectAtIndex:indexPath.row];
  return cell;
}
- (IBAction)AddButtonAction:(id)sender
{
   [arry addObject:@"asd"];
   [tableView1 reloadData];
}
- (IBAction)DeleteButtonAction:(id)sender
{
   [arry removeLastObject];
   [tableView1 reloadData];
}
- (IBAction) EditTable:(id)sender
{
   if(self.editing)
   {
      [super setEditing:NO animated:NO]; 
      [tableView1 setEditing:NO animated:NO];
      [tableView1 reloadData];
      [self.navigationItem.leftBarButtonItem setTitle:@"Edit"];
      [self.navigationItem.leftBarButtonItem setStyle:UIBarButtonItemStylePlain];
   }
   else
   {
      [super setEditing:YES animated:YES]; 
      [tableView1 setEditing:YES animated:YES];
      [tableView1 reloadData];
      [self.navigationItem.leftBarButtonItem setTitle:@"Done"];
      [self.navigationItem.leftBarButtonItem setStyle:UIBarButtonItemStyleDone];
   }
}
-(UITableViewCellEditingStyle)tableView:(UITableView *)aTableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath 
{
   if (self.editing == NO || !indexPath) 
        return UITableViewCellEditingStyleNone;
   if (self.editing && indexPath.row == ([arry count])) 
   {
        return UITableViewCellEditingStyleInsert;
   } 
   else 
   {
    return UITableViewCellEditingStyleDelete;
   }
        return UITableViewCellEditingStyleNone;
}
-(void)tableView:(UITableView *)aTableView commitEditingStyle:UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath 
{
   if (editingStyle == UITableViewCellEditingStyleDelete) 
   {
      //[arry removeObjectAtIndex:indexPath.row];
      rowIndex=indexPath.row;
      UIActionSheet *actionSheet=[[UIActionSheet alloc]
      initWithTitle:@"Are you sure you want to delete this ?"
      delegate:self
      cancelButtonTitle:@"Cancel"
      destructiveButtonTitle:@"Delete"
      otherButtonTitles:nil,nil];
      [actionSheet showInView:self.view];
      [actionSheet  release];
   } 
   else if(editingStyle == UITableViewCellEditingStyleInsert)
   {
      UIAlertView *alert = [[UIAlertView alloc] 
                       initWithTitle:@"Enter Row value" 
                       message:@"blank" 
                       delegate:self 
                       cancelButtonTitle:@"Dismiss"
                       otherButtonTitles:@"OK!", nil];
      myTextField= [[UITextField alloc] initWithFrame:CGRectMake(12, 45, 260, 25)];
      [myTextField setBackgroundColor:[UIColor whiteColor]];
      [alert addSubview:myTextField];
      [alert show];
      [alert release];
   }
}

-(void) actionSheet:(UIActionSheet *) actionSheet willDismissWithButtonIndex:(NSInteger)buttonIndex;
{
   if(buttonIndex==0)
   {
      [arry removeObjectAtIndex:rowIndex ];
      [tableView1 reloadData];
   }
   else if (buttonIndex==1)
   {
      [tableView1 reloadData];
   }
}
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
   if (buttonIndex == 0)
   {
      [tableView1 reloadData];
   }
   else if (buttonIndex == 1 && myTextField.hasText!=NO)
   {   
      NSString *txt=[myTextField text];
     [arry addObject:txt ];
     [tableView1 reloadData];
   }
}
-(BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
   return YES;
}
@end
4

1 回答 1

0

出于好奇，您为什么要使用 aTableVIewController : UIViewController <UITableViewDelegate, UITableViewDataSource>而不是仅仅TableViewController继承 from UITableViewController？您是否在此视图中显示任何其他内容？因为如果您不是，您可能应该将视图控制器子类化为最接近您打算拥有的视图控制器 - 这是一个UITableViewController.

如果这样做，您还可以通过tableView（或self.tableView，但不是必需的）属性访问此视图的默认表。这不是你的问题的原因，但它是一种很好的做法。

于 2012-05-22T14:01:00.023 回答