CODEWITHSUNDEEP
iphoneiosxcodensmutablearray
Alok Srivastava
Alok Srivastava

Reputation: 197

NSMutable Array data source for UITableview cell

NSString *myMessage=messageField.text;
[messageArray addObject:myMessage]];
messageContentArray=[[NSMutableArray alloc] initWithArray:messageArray];

[_tableView reloadData];

I have a UITableview and I used a NSMutable array of string as datasource then it works fine. But now I want to add another string in this array on click of a button as above but as soon as I touch the button then application crash and give

'NSInvalidArgumentException', reason: '-[NSCFString count]: unrecognized selector sent to instance 0x4e11cf0'

How I can do this my table view is as bellow please help me

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{

                 return [messageContentArray count];
             }
#pragma mark -
#pragma mark UITableView Delegaates
static CGFloat padding = 20.0;
    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
                 static NSString *CellIdentifier = @"messagesCellIdentifier";

                 SMMessageViewTableCell *cell = (SMMessageViewTableCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];

                 if (cell == nil) {
                     cell = [[[SMMessageViewTableCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
                 }
                 NSString *usrid=[useridArray objectAtIndex:indexPath.row];
                NSData *imgData1 = (NSData*)[[NSUserDefaults standardUserDefaults] objectForKey:@"lisnerImage"];
                 UIImage *img1 = [UIImage imageWithData: imgData1];

                // CGRect imageFrame=CGRectMake(5,20,25,30);
                 //CGRect imageFrame1=CGRectMake(250,20,25,30);
                 //self.cellimage=[[[UIImageView alloc] initWithFrame:imageFrame] autorelease];
//               self.cellimage1=[[[UIImageView alloc] initWithFrame:imageFrame1] autorelease];
                 if ([usrid caseInsensitiveCompare:friend_Id] == NSOrderedSame) {

                     [cell.usrImage setFrame:CGRectMake(250, 
                                                           20, 
                                                           25, 
                                                          30)];
                     cell.usrImage.image = userImage.image;
                    // self.cellimage1.image=userImage.image;
//                    [cell.contentView addSubview:self.cellimage1];
                     NSString *messages1 = [messageContentArray objectAtIndex:indexPath.row];
                     CGSize  textSize = { 260.0, 10000.0 };
                     CGSize size = [messages1 sizeWithFont:[UIFont systemFontOfSize:13]
                                         constrainedToSize:textSize 
                                             lineBreakMode:UILineBreakModeWordWrap];
                     size.width += (padding/2);
                     cell.messageContentView.text = messages1;
                     cell.accessoryType = UITableViewCellAccessoryNone;
                     cell.userInteractionEnabled = NO;
                     UIImage *bgImage = nil;
                     bgImage = [[UIImage imageNamed:@"aqua.png"] stretchableImageWithLeftCapWidth:24  topCapHeight:15];

                     [cell.messageContentView setFrame:CGRectMake(45 , 
                                                                  20, 
                                                                  190, 
                                                                  size.height)];

                     [cell.bgImageView setFrame:CGRectMake(45, 
                                                           17, 
                                                           190, 
                                                           size.height+padding)];
                     cell.bgImageView.image = bgImage;
                 }else {
                     //self.cellimage.image=img1;
//                   [cell.contentView addSubview:self.cellimage];
                     [cell.usrImage setFrame:CGRectMake(5, 
                                                        20, 
                                                        25, 
                                                        30)];
                     cell.usrImage.image = img1;
                         NSString *messages1 = [messageContentArray objectAtIndex:indexPath.row];
                     CGSize  textSize = { 260.0, 10000.0 };
                     CGSize size = [messages1 sizeWithFont:[UIFont systemFontOfSize:13]
                                         constrainedToSize:textSize 
                                             lineBreakMode:UILineBreakModeWordWrap];
                     size.width += (padding/2);
                     cell.messageContentView.text = messages1;
                     cell.accessoryType = UITableViewCellAccessoryNone;
                     cell.userInteractionEnabled = NO;
                     UIImage *bgImage = nil;
                     bgImage = [[UIImage imageNamed:@"orange.png"] stretchableImageWithLeftCapWidth:24  topCapHeight:15];

                     [cell.messageContentView setFrame:CGRectMake(45, 20, 190, size.height)];

                     [cell.bgImageView setFrame:CGRectMake( 45, 
                                                           17, 
                                                           190, 
                                                           size.height+padding)];
                                         cell.bgImageView.image = bgImage;

                 }



                 return cell;
             }
             - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
                             }
             -(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
                // return 65;

                 NSString *text = [messageContentArray objectAtIndex:[indexPath row]];

                 CGSize constraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), 20000.0f);

                 CGSize size = [text sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];

                 CGFloat height = MAX(size.height+20, 44.0f);

                 return height + (CELL_CONTENT_MARGIN * 2);
             }

Upvotes: 1

Views: 2767

Answers (3)

demon9733
demon9733

Reputation: 854

The dataSource of UITableView is not an array, but an object (most often UIViewController), that implements UITableViewDataSource protocol. Here is the documentation.

Upvotes: 0

DLende
DLende

Reputation: 5242

If your datasource array is messageContentArray and it is instantiated already, then you can simply do this

- (IBAction)clicked:(id)sender {
  NSString *myMessage = messageField.text;
  [messageContentArray addObject:myMessage];
  [_tableView reloadData];
}

- (NSInteger)tableView:(UITableView *)_tableView numberOfRowsInSection:(NSInteger)section
{
    return [messageContentArray count];
}

    // 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] autorelease];
    }

    NSString *str =  [messageContentArray objectAtIndex:indexPath.row];
    [cell.textLabel str];

    return cell;
}

Upvotes: 2

Ladislav
Ladislav

Reputation: 7283

I would never use NSMutableArray for your datasource.

I would just do the following: (messageContentArray is now NSArray and thus immutable)

NSString *myMessage=messageField.text;
NSMutableArray *tempArray = [NSMutableArray arrayWithArray:messageArray]; 
[tempArray addObject:myMessage];
self.messageContentArray = [NSArray arrayWithArray:tempArray];
[_tableView reloadData];

One thing that this error is saying, is the fact that you are trying to get count from NSString...so make sure wherever you are calling count it is on NSArray and not on NSString which does not implement this method.

Upvotes: -1

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