[英]Updating UILabel text in custom cell
在我的UITableViewController中,有一些從JSON填充的自定義單元格。 每個單元格都有一個顯示文本值的UILabel
( @"valoracion"
)。 當用戶選擇一行時,將顯示來自單元對象的詳細視圖。 在此詳細視圖中,用戶可以更改valoracion
的值。 如果用戶返回UITableViewController
, valoracion
應顯示新值,但實際上它顯示舊值。
我應該怎么做更新valoracion
中UITableViewController
當用戶從細節着眼於蝸居UITableViewController
。
更新* * *
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
CustomCell *cell =[tableView dequeueReusableCellWithIdentifier:@"Cell"];
if (cell ==nil){
cell = [[CustomCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"Cell"];
}
//cell.backgroundColor = [UIColor clearColor];
cell.nombreEmpresaLabel.text = [[categorias objectAtIndex:indexPath.row] objectForKey:@"nombreEmpresa"];
//[[cell contentView] setBackgroundColor:[UIColor clearColor]];
//cell.textLabel.backgroundColor = nil;
// cell.detailTextLabel.backgroundColor=nil;
cell.textLabel.textColor = [UIColor whiteColor];
cell.direccionEmpresaLabel.text= [[categorias objectAtIndex:indexPath.row] objectForKey:@"direccionEmpresa"];
NSMutableString *logo = [[NSMutableString alloc]initWithString:@"http://mujercanariasigloxxi.appgestion.eu/logos/"];
NSString *imageURL = [[categorias objectAtIndex:indexPath.row] objectForKey:@"strImagen"];
cell.meGustaHits.text = [[categorias objectAtIndex:indexPath.row] objectForKey:@"valoracionEmpresa"];
if(imageURL != nil && ![imageURL isEqual:[NSNull null]])
{
[logo appendString:imageURL];
NSURL *logoURL = [NSURL URLWithString:logo];
NSData *logoData = [NSData dataWithContentsOfURL:logoURL];
cell.logoImage.image = [UIImage imageWithData:logoData];
}
else{
cell.logoImage.image = [UIImage imageNamed:@"icono80"];
}
return cell;
}
里面的viewDidLoad方法:
//URL definition where php file is hosted
int categoriaID = [[categoriaDescription objectForKey:@"idCategoria"] intValue];
NSString *string = [NSString stringWithFormat:@"%d", categoriaID];
NSLog(@"CATEGORIA ID STGRING %@",string);
NSMutableString *ms = [[NSMutableString alloc] initWithString:@"http://mujercanariasigloxxi.appgestion.eu/app_php_files/empresaslist.php?id="];
[ms appendString:string];
// URL request
NSLog(@"URL = %@",ms);
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:ms]];
//URL connection to the internet
[[NSURLConnection alloc]initWithRequest:request delegate:self];
現在JSON委托方法和didSelecRowAtIndexpath方法:
//methods to perform the connection and population of data
-(void)connection: (NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
data = [[NSMutableData alloc]init];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)thedata
{
[data appendData:thedata];
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
//if data received network indicator not visible
[UIApplication sharedApplication].networkActivityIndicatorVisible=NO;
//array waterfalls populated via JSON from database
categorias = [NSJSONSerialization JSONObjectWithData:data options:nil error:nil];
NSLog(@"THE DA TA &@",categorias);
[self.tableView reloadData];
}
//only in case of error
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
UIAlertView *errorView = [[UIAlertView alloc]initWithTitle:@"Error" message:@"The download could not complete - please make sure you are connected to eithre 3G or WiFi" delegate:nil cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
[errorView show];
//if no connection network indicator not visible
[UIApplication sharedApplication].networkActivityIndicatorVisible=NO;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
DetalleEmpresaViewController *detailViewController =[self.storyboard instantiateViewControllerWithIdentifier:@"detailEmpresaViewController"];
detailViewController.title =[[categorias objectAtIndex:indexPath.row]objectForKey:@"idCategoria"];
detailViewController.detalleDescription = [categorias objectAtIndex:indexPath.row];
[self.navigationController pushViewController:detailViewController animated:YES];
}
嘗試調用[tableview reloadData]
方法並確保正確實現tableview委托方法。
如果您更改並保存JSON的位置是另一個,而不是tableViewController
,則將reloadData
方法放在tableViewController
類的viewDidAppear
中。 如果將JSON保存在同一tableViewController
其他方法中,則將reloadData
放在此方法的最后一行中。
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