Refresh table view? - ios

Question

I think I have a pretty easy task, but somehow it doesn't want to work. I am a total beginner in objective-c, so I guess it's just a small mistake. I still don't really know what I do, currently it's more like copy&paste programming. Like I don't really know if I need the IBOutlet in the interface or as a property or as both.
What I have:
A ViewController with a Button, a Label and a Table View. The button connects to a sharepoints server and reads a list and adds the value to an array. This part works.
Delegate and DataSource outlet is connected to the View Controller.
What I want:
The array should be the datasource of the Table View, so I just want it to refresh after I've read the new data in the array. The test data I add in the viewDidLoad function to the array, shows up. So I guess I somehow connected the array to the table view.
I'll give you the full code:
ViewController.h:
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>
{
IBOutlet UILabel *output;
IBOutlet UITableView *tableView;
NSMutableData *webData;
NSString *finaldata;
NSString *convertToStringData;
NSMutableString *nodeContent;
}
#property (nonatomic, retain) UILabel *output;
#property (nonatomic, weak) IBOutlet UITableView *tableView;
-(IBAction)invokeService:(UIButton *) sender;
#end
ViewController.m:
#import "ViewController.h"
#interface ViewController ()
{
NSMutableArray *foundUrlaub;
}
#end
#implementation ViewController
#synthesize output;
- (void)viewDidLoad
{
[super viewDidLoad];
// SOME TEST DATA... THIS SHOWS UP IN MY TABLE VIEW
foundUrlaub = [[NSMutableArray alloc]init];
[foundUrlaub addObject:#"first cell"];
[foundUrlaub addObject:#"second cell"];
[foundUrlaub addObject:#"third cell"];
}
-(IBAction)invokeService:(UIButton *) sender
{
// connection to sharepoint
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
NSLog(#"didReceiveResponse");
[webData setLength:0];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
NSLog(#"didReceiveData");
[webData appendData:data];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(#"ERROR with the Connection");
NSLog(error.description);
}
-(BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace
{
NSLog(#"canAuthenticateAgainstProtectionSpace");
return YES;
}
-(void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
{
NSLog(#"didReceiveAuthenticationChallenge");
NSURLCredential *credential = [NSURLCredential credentialWithUser:#"XXXXXX" password:#"XXXXXX" persistence:NSURLCredentialPersistenceForSession];
[[challenge sender] useCredential:credential forAuthenticationChallenge:challenge];
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(#"DONE. Received Bytes: %d", [webData length]);
convertToStringData = [[NSString alloc] initWithData:webData encoding:NSUTF8StringEncoding];
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:#"(?<=ows_Title=')(.*)(?=' ows_MetaInfo)" options:0 error:NULL];
NSArray *matches = [regex matchesInString:convertToStringData options:0 range:NSMakeRange(0, [convertToStringData length])];
// HERE I LOAD SOME DATA IN THE ARRAY
[foundUrlaub removeAllObjects];
for (NSTextCheckingResult *match in matches)
{
NSRange matchRange = [match rangeAtIndex:1];
NSString *matchString = [convertToStringData substringWithRange:matchRange];
NSLog(#"Match: %#", matchString);
[foundUrlaub addObject:matchString]; // <- ADDS 3 STRINGS TO ARRAY
}
// THIS DOES NOT WORK!
[tableView reloadData];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [foundUrlaub count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = #"TableItem";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}
cell.textLabel.text = [foundUrlaub objectAtIndex:indexPath.row];
return cell;
}
#end

Answer 1

try using [_tableView reloadData]; You didn't #synthesize your tableView in your .m so you have to use the autosynthesized identifier

Answer 2

Your code looks fine ,
make sure
IBOutlet for tableView is connected properly
Datasource and delegates from nib is connected to the files owner
A must watch and a must read for you

Answer 3

You have to connect the Outlet in the Interfacebuilder to your UITableview tableView.

Answer 4

You are trying to reload table from separate thread. so UIView can be changed only from main thread so do something like this:
[tableView performSelectorOnMainThread:#selector(reloadData)
withObject:nil
waitUntilDone:YES];