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POUsing UIButton to refresh the UItableViewCell content
 

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  1. POUsing UIButton to refresh the UItableViewCell content
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    <p>There are two components, UItableView and a UIButton, in my app.</p> <p>The UItableViewcell will load the data from remote database fulfilled by JSON.</p> <pre><code>-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{ static NSString *TableIdentifier = @"tableidentifier" UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:TableIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:TableIdentifier] autorelease]; } NSDictionary *voc_list=[listData objectAtIndex:indexPath.row]; NSLog(@"%@",voc_list); cell.textLabel.text = [[(NSDictionary*)voc_list objectForKey:@"vocabulary_list"]objectForKey:@"Vocabulary"]; cell.detailTextLabel.text=[[(NSDictionary*)voc_list objectForKey:@"vocabulary_list"]objectForKey:@"Translation"]; cell.textLabel.font = [UIFont boldSystemFontOfSize:15]; return cell; } </code></pre> <p>However, I want to refresh all the table content when user press the button, and I try to implement the following code:</p> <pre><code> -(IBAction)historyPressed:(id)sender{ isToogle = !isToogle; if(isToogle){ // Back to original table content }else{ // Following codes will communicate with remote server and filter data to the app. // The app go smooth here. NSError *error = NULL; NSDictionary *getStuID=[NSDictionary dictionaryWithObjectsAndKeys:student_id,@"Stu_ID", nil]; NSData *jsonData = [NSJSONSerialization dataWithJSONObject:getStuID options:NSJSONWritingPrettyPrinted error:&amp;error]; [self sendTOcompareByJSON:jsonData]; //Following codes are trying to show/refresh the data on tableview, but the app will go crash. CGPoint location = [sender locationInView:self.table]; NSIndexPath *indexPath = [self.table indexPathForRowAtPoint:location]; UITableViewCell *new_cell=[self.table cellForRowAtIndexPath:indexPath]; historyList_= [NSArray arrayWithArray:personalized_history]; NSDictionary *dic = [historyList_ objectAtIndex:indexPath.row]; new_cell.textLabel.text=[[(NSDictionary*)dic objectForKey:@"history_list"]objectForKey:@"Vocabulary"]; new_cell.detailTextLabel.text=[[(NSDictionary*)dic objectForKey:@"history_lsit"]objectForKey:@"Score"]; } } </code></pre>
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    1. COyou have a simple option to update data used in data sources of table and reload the whole table.
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      1. POUsing UIButton to refresh the UItableViewCell content
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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