NSMutableArray is empty after ViewDidLoad - objective-c

Question

Data not loading in tableView here is my description.
I am trying to add objects from API which responding me in JSON form of data into NSMutableArray but it is not loading with the tableview.
I can see the array sets ok but it does not load into tableview until I try to scroll the tableview.
It is just so annoying and cannot figure out why kindly help me to figure out.
Here is my code -
- (void)viewDidLoad {
[SVProgressHUD showWithStatus:#"Please wait ..."];
//get the bookings
[self getBookings];
[super viewDidLoad];
[self.tableView reloadData];
}
-(void) getBookings
{
uid=#"41";
bookingsList=[[NSMutableArray alloc] init];
NSString *urlAsString = [NSString stringWithFormat:#"http://www.webservice.com/cleaning/api/booking/show/%#/%d",uid,0];
NSURL *url = [[NSURL alloc] initWithString:urlAsString];
NSLog(#"%#", urlAsString);
[NSURLConnection sendAsynchronousRequest:[[NSURLRequest alloc] initWithURL:url] queue:[[NSOperationQueue alloc] init] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
if (error) {
NSLog(#"URL Session Task Failed: %#", [error localizedDescription]);
}
else {
NSArray *postsFromResponse = [NSJSONSerialization JSONObjectWithData: data options:NSJSONReadingMutableContainers error:nil];
NSLog(#"Count %d", postsFromResponse.count);
NSLog(#"JSON: %#", postsFromResponse);
//remove all objects from array
[self.bookingsList removeAllObjects];
for (NSDictionary *attributes in postsFromResponse) {
booking *bk = [[booking alloc] init];
[bk setAddress:[attributes objectForKey:#"Address"]];
[bk setBookingId:[attributes objectForKey:#"BookingID"]];
[bk setServiceDate:[attributes objectForKey:#"ServiceDate"]];
[bk setClientName:[attributes objectForKey:#"ClientName"]];
[bk setStatus:[attributes objectForKey:#"Status"]];
[bk setServiceTime:[attributes objectForKey:#"ServiceTime"]];
[bk setPrice:[attributes objectForKey:#"Price"]];
[bk setCleanType:[attributes objectForKey:#"CleanType"]];
[bk setNumOfHours:[attributes objectForKey:#"NumOfHours"]];
//add to array
[self.bookingsList addObject:bk];
}
NSLog(#"Records found -%lu",(unsigned long)[bookingsList count]);
[self.tableView reloadData];
if(bookingsList.count==0)
{
UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:#"No Data Alert!"
message:#"No bookings found!" delegate:nil
cancelButtonTitle:#"OK" otherButtonTitles:nil];
//[alertView show];
[alertView performSelectorOnMainThread:#selector(show) withObject:nil waitUntilDone:YES];
}
}
}];
[SVProgressHUD dismiss];
}
#pragma mark - TableView Delegate Methods
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
NSLog(#"Total rows - %lu", (unsigned long)[self.bookingsList count]);
return [self.bookingsList count];
}

Answer 1

Use This It Will Help You
- (void)viewDidLoad {
[SVProgressHUD showWithStatus:#"Please wait ..."];
//get the bookings
[self getBookings];
[super viewDidLoad];
}
-(void) getBookings
{
uid=#"41";
bookingsList=[[NSMutableArray alloc] init];
NSString *urlAsString = [NSString stringWithFormat:#"http://www.webservice.com/cleaning/api/booking/show/%#/%d",uid,0];
NSURL *url = [[NSURL alloc] initWithString:urlAsString];
NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:urlAsString];
[request setHTTPMethod:GET_REQUEST];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *err)
{
if (error) {
NSLog(#"URL Session Task Failed: %#", [error localizedDescription]);
}
else {
NSArray *postsFromResponse = [NSJSONSerialization JSONObjectWithData: data options:NSJSONReadingMutableContainers error:nil];
NSLog(#"Count %d", postsFromResponse.count);
NSLog(#"JSON: %#", postsFromResponse);
//remove all objects from array
[self.bookingsList removeAllObjects];
for (NSDictionary *attributes in postsFromResponse) {
booking *bk = [[booking alloc] init];
[bk setAddress:[attributes objectForKey:#"Address"]];
[bk setBookingId:[attributes objectForKey:#"BookingID"]];
[bk setServiceDate:[attributes objectForKey:#"ServiceDate"]];
[bk setClientName:[attributes objectForKey:#"ClientName"]];
[bk setStatus:[attributes objectForKey:#"Status"]];
[bk setServiceTime:[attributes objectForKey:#"ServiceTime"]];
[bk setPrice:[attributes objectForKey:#"Price"]];
[bk setCleanType:[attributes objectForKey:#"CleanType"]];
[bk setNumOfHours:[attributes objectForKey:#"NumOfHours"]];
//add to array
[self.bookingsList addObject:bk];
}
NSLog(#"Records found -%lu",(unsigned long)[bookingsList count]);
dispatch_async(dispatch_get_main_queue(),^{
[self.tableView reloadData];
});
if(bookingsList.count==0)
{
UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:#"No Data Alert!"
message:#"No bookings found!" delegate:nil
cancelButtonTitle:#"OK" otherButtonTitles:nil];
//[alertView show];
[alertView performSelectorOnMainThread:#selector(show) withObject:nil waitUntilDone:YES];
}
}
}];
[task resume];
[SVProgressHUD dismiss];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
NSLog(#"Total rows - %lu", (unsigned long)[self.bookingsList count]);
return [self.bookingsList count];
}

Answer 2

Coding conventions: The backing variable for any property should start with an underscore. Like _bookingsList. If you don't follow that connection, we cannot know without having your complete source code where an assignment to bookingsList will store the result.