Tableview data won't load when unsegmented control is changed - ios

Question

//The tableview is not changing. I have been at this for days. It seems so simple. Thank you for your help
#import "StopsTableViewController.h"
static NSString *MyIdentifier = #"RouteListing";
#interface StopsTableViewController ()
#property (strong, nonatomic) NSArray *TESTARRAY;
#end
#implementation StopsTableViewController
- (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
//Set the tab bar item's title
self.title = #"Stops";
}
self.stopList = [[API sharedAPI] fetchStopListing];
self.TESTARRAY = #[#"Josh", #"Kyle", #"Nate"];
return self;
}
- (void)viewDidLoad {
[super viewDidLoad];
[self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:MyIdentifier];
// Adds Segmented Control
[self segmentedView];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void) segmentedView {
NSArray *segmentedMenu = [NSArray arrayWithObjects:#"All", #"Near Me", nil];
UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:segmentedMenu];
[segmentedControl addTarget:self
action:#selector(valueChanged:)
forControlEvents:UIControlEventValueChanged];
segmentedControl.selectedSegmentIndex = 0;
self.navigationItem.titleView = segmentedControl;
}
pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if ([self.segmentedControl selectedSegmentIndex] == 0) {
return [self.stopList count];
}
else {
return [self.TESTARRAY count];
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:MyIdentifier];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
if (_segmentedControl.selectedSegmentIndex == 0) {
cell.textLabel.text = [[self.stopList objectAtIndex:indexPath.row] objectForKey:#"stoptitle"];
cell.detailTextLabel.text = [NSString stringWithFormat:#"Stop %#", [[self.stopList objectAtIndex:indexPath.row] objectForKey:#"stopnumber"]];
}
else {
cell.textLabel.text = self.TESTARRAY[indexPath.row];
}
return cell;
}
pragma mark - Table view delegate
// In a xib-based application, navigation from a table can be handled in -tableView:didSelectRowAtIndexPath:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// Navigation logic may go here, for example:
// Create the next view controller.
StopInfoViewController *detailViewController = [[StopInfoViewController alloc] initWithNibName:#"StopInfoViewController" bundle:nil];
// Pass the selected object to the new view controller.
detailViewController.stopInfo = [[self.stopList objectAtIndex:indexPath.row] objectForKey:#"stopnumber"];
detailViewController.stopName = [[self.stopList objectAtIndex:indexPath.row] objectForKey:#"stoptitle"];
// Push the view controller.
[self.navigationController pushViewController:detailViewController animated:YES];
}
//Function for segmentedView
-(void) valueChanged:(UISegmentedControl *)sender {
[self.tableView reloadData];
NSLog(#"I'm getting called segment number is: %ld", (long)sender.selectedSegmentIndex);
}
#end

Answer 1

Check your datasource array before calling the table reload method and make sure that the array contains new values corresponding to the segment that you have selected.

Answer 2

One thing I always run into when struggle up a table view is connecting the table with the interface using interface builder. Because it sounds like you're getting the data loaded, when the view first loads. But when you call [self.tableView reloadData] without having the connection made to the table, nothing will happen.
I ways forget that super simple step. Hope this helped

Answer 3

Did you set the tableview delegates?
Try putting this in your viewDidLoad function.
[tableView setDelegate:self];
[tableView setDataSource:self];
If you want a fuller explanation, check here:
how to set a tableview delegate
That post also explains how to ensure your class subscribes to the UITableViewDelegate and UITableViewDataSource protocols
Hope that helps.