xcode - refresh tableview after called method from anther class - ios

Question

i create button to add student , i make method handle that by showing pop menu(alert view)
then get the code entered in variable called result (NSString) then called web service get required data from my web service
- (IBAction)add_button:(id)sender {
[self addStudent];
}
- (void) addStudent {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Add Student" message:#"Enter Connection Code" delegate:self cancelButtonTitle:#"Dismiss" otherButtonTitles:#"Add", nil];
[alert setAlertViewStyle:UIAlertViewStylePlainTextInput];
[alert show];
}
-(void) alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
result = [[alertView textFieldAtIndex:0] text];
NSLog(#"the result connection code %#",result);
WebService *web = [[WebService alloc]init];
[web retriveDataWithCodeAndUrl:result Andurl:STUDENT_URL];
}
in web service class
after finish loading and get required data
i need back my tableview and refresh it with new data
i try protocol but it doent work so i try make instance of my tableview class
, i try also make notification to handle it and refresh view
(webservice class)
-(void) connectionDidFinishLoading :(NSURLConnection *) connection{
NSLog(#"data finish loading ");
School_TableViewController *home = [[School_TableViewController alloc]init];
[home didFinishWithData:respone];
[[self delegate]didFinishLoadingwithData:respone];
[[NSNotificationCenter defaultCenter]
postNotificationName:#"TestNotification"
object:self];
}
back to my table view class to handle notification and refresh table
- (void) receiveTestNotification:(NSNotification *) notification
{
if ([[notification name] isEqualToString:#"TestNotification"])
NSLog (#"Successfully received the test notification!");
[self.tableView reloadData];
}
but it dosnt work , i need nice way to communicate between singleton and tableview
and method to refresh view
thank you in advance

Answer 1

Certainly It doen't work because you didn't update data for your tableView
and I wonder why you didn't use the delegate didFinishLoadingwithData
use delegate:
-In School_TableViewController.h:
#interface School_TableViewController : UITableViewController <YourWebServiceDelegate>
-In School_TableViewController.m:
-(void) didFinishLoadingwithData:(NSData*) data {
// Do parse respone data method and update yourTableViewData
yourtableViewData = notification.object
[self.tableView reloadData];
}
or try
-In service class
-(void) connectionDidFinishLoading :(NSURLConnection *) connection{
NSLog(#"data finish loading ");
/* remove this code you don't need alloc School_TableViewController
School_TableViewController *home = [[School_TableViewController alloc]init];
[home didFinishWithData:respone];
*/
[[self delegate]didFinishLoadingwithData:respone];
[[NSNotificationCenter defaultCenter]
postNotificationName:#"TestNotification"
object:response];
}
-In your tableView
- (void) receiveTestNotification:(NSNotification *) notification
{
if ([[notification name] isEqualToString:#"TestNotification"])
NSLog (#"Successfully received the test notification!");
// Do parse respone data method and update yourTableViewData
yourtableViewData = notification.object
[self.tableView reloadData];
}