AFNetworking tutorial of raywenderlich not displaying data on table cell - ios

Question

I am learning AFNetworking using,
https://www.raywenderlich.com/59255/afnetworking-2-0-tutorial
But, For json part I am not getting data displayed on cell that displyed in this tutorial.
I am getting response in json format but after that nothing is displayed in cells.
static NSString * const BaseURLString = #"http://www.raywenderlich.com/demos/weather_sample/";
#interface WTTableViewController ()
#property(strong) NSDictionary *weather;
#end
#implementation WTTableViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationController.toolbarHidden = NO;
[self.tableView setDelegate:self];
self.tableView.dataSource=self;
// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if([segue.identifier isEqualToString:#"WeatherDetailSegue"]){
UITableViewCell *cell = (UITableViewCell *)sender;
NSIndexPath *indexPath = [self.tableView indexPathForCell:cell];
WeatherAnimationViewController *wac = (WeatherAnimationViewController *)segue.destinationViewController;
NSDictionary *w;
switch (indexPath.section) {
case 0: {
w = self.weather.currentCondition;
break;
}
case 1: {
w = [self.weather upcomingWeather][indexPath.row];
break;
}
default: {
break;
}
}
wac.weatherDictionary = w;
}
}
#pragma mark - Actions
- (IBAction)clear:(id)sender
{
self.title = #"";
self.weather = nil;
[self.tableView reloadData];
}
- (IBAction)jsonTapped:(id)sender
{
NSString *string = [NSString stringWithFormat:#"%#weather.php?format=json", BaseURLString];
NSURL *url = [NSURL URLWithString:string];
//NSURLRequest *request = [NSURLRequest requestWithURL:url];
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
[manager GET:string parameters:nil progress:nil success:^(NSURLSessionTask *task, id responseObject) {
NSLog(#"JSON: %#", responseObject);
} failure:^(NSURLSessionTask *operation, NSError *error) {
NSLog(#"Error: %#", error);
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:#"Error Retrieving Weather"
message:[error localizedDescription]
delegate:nil
cancelButtonTitle:#"Ok"
otherButtonTitles:nil];
[alertView show];
}];
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 2;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if(!self.weather)
return 1;
switch (section) {
case 0: {
NSLog(#"return 1");
return 1;
}
case 1: {
NSArray *upcomingWeather = [self.weather upcomingWeather];
NSLog(#"return upcomingWeather");
return [upcomingWeather count];
}
default:
return 0;
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{NSLog(#"tableView");
static NSString *CellIdentifier = #"WeatherCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
NSDictionary *daysWeather = nil;
switch (indexPath.section) {
case 0: {
daysWeather = [self.weather currentCondition];
NSLog(#"currentCondition");
break;
}
case 1: {
NSArray *upcomingWeather = [self.weather upcomingWeather];
daysWeather = upcomingWeather[indexPath.row];
NSLog(#"upcomingWeather");
break;
}
default:
break;
}
cell.textLabel.text = [daysWeather weatherDescription];
NSLog(#"textLabel = %#", cell.textLabel.text);
// Configure the cell...
return cell;
}
I have this code in my table view controller.
This methods are used in delegate method in above code :
- (NSDictionary *)currentCondition
{
NSDictionary *dict = self[#"data"];
NSArray *ar = dict[#"current_condition"];
return ar[0];
}
- (NSArray *)upcomingWeather
{
NSDictionary *dict = self[#"data"];
return dict[#"weather"];
}
I am getting response in json formate but cells are empty.
Please refer tutorial if anything is missing here.
Thank you.

Answer 1

In success of data received you just printing data.
you have to store that data in dictionary and reload tableview.
Use below code:
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
[manager GET:string parameters:nil progress:nil
success:^(NSURLSessionTask *task, id responseObject) {
self.weather = (NSDictionary *)responseObject; //add this line
[self.tableView reloadData]; //add this line
} failure:^(NSURLSessionTask *operation, NSError *error) {
NSLog(#"Error: %#", error);
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:#"Error Retrieving Weather"
message:[error localizedDescription]
delegate:nil
cancelButtonTitle:#"Ok"
otherButtonTitles:nil];
[alertView show];
}];

Answer 2

You are missing following code from success block
self.weather = (NSDictionary *)responseObject;
self.title = #"JSON Retrieved";
[self.tableView reloadData];

Answer 3

Just check the data existence inside weather dict once before you loaded into tableview and after completion of getting data from server just call reloadData method of uitableView so it will load data received by your code later.