TableView is not updating - ios

Question

I hope you guys help me in my code which is load data from a website. Let's start with the code:
-(void)viewDidLoad
{
[self loadDataFromUrl];
}
-(void)loadDataFromUrl {
NSString *myUrl = [NSString stringWithFormat:#"http://WebSite/PhpFiles/File.php"];
NSURL *blogURL = [NSURL URLWithString:myUrl];
NSData *jsonData = [NSData dataWithContentsOfURL:blogURL];
NSError *error = nil;
NSDictionary *dataDictionary = [NSJSONSerialization
JSONObjectWithData:jsonData options:0 error:&error];
for (NSDictionary *bpDictionary in dataDictionary) {
HotelObject *currenHotel = [[HotelObject alloc]initWithVTheIndex:
[bpDictionary objectForKey:#"TheIndex"] timeLineVideoUserName:
[bpDictionary objectForKey:#"timeLineVideoUserName"] timeLineVideoDetails:
[bpDictionary objectForKey:#"timeLineVideoDetails"] timeLineVideoDate:
[bpDictionary objectForKey:#"timeLineVideoDate"] timeLineVideoTime:
[bpDictionary objectForKey:#"timeLineVideoTime"] timeLineVideoLink:
[bpDictionary objectForKey:#"timeLineVideoLink"] timeLineVideoLikes:
[bpDictionary objectForKey:#"timeLineVideoLikes"] videoImage:
[bpDictionary objectForKey:#"videoImage"] timeDeviceToken:
[bpDictionary objectForKey:#"deviceToken"]];
[self.objectHolderArray addObject:currenHotel];
}
}
-(NSMutableArray *)objectHolderArray{
if(!_objectHolderArray) _objectHolderArray = [[NSMutableArray alloc]init];
return _objectHolderArray;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:
(NSInteger)section
{
return [self.objectHolderArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:
(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
Cell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier
forIndexPath:indexPath];
HotelObject *currentHotel = [self.objectHolderArray
objectAtIndex:indexPath.row];
cell.lblID.text = currentHotel.vvTheIndex;
cell.lblName.text = currentHotel.vvUserName;
cell.lblCity.text = currentHotel.vvVideoDate;
cell.lblAddress.text = currentHotel.vvVideoLikes;
return cell;
}
The above code is loading data from a Url and fill the TableView and this step working fine. The app has another ViewController which is DetailsView, in DetailsView users can update some info. When the user goes back to the TableView nothing happened (I mean the data still the same and not updated). I have tried to call the loadDataFromurl from ViewDidAppear but it does not work.
I did add:
[self.tableView reloadData];
But still the same result.
Her is also my NSObject code:
-(instancetype)initWithVTheIndex:(NSString *)vTheIndex
timeLineVideoUserName:(NSString *)vUserName
timeLineVideoDetails:(NSString *)vVideoDetails
timeLineVideoDate:(NSString *)vVideoDate
timeLineVideoTime:(NSString *)vVideoTime
timeLineVideoLink:(NSString *)vVideoLink
timeLineVideoLikes:(NSString *)vVideoLikes
videoImage:(NSString *)vVideoImage
timeDeviceToken:(NSString *)vDeviceToken {
self = [super init];
if(self){
self.vvTheIndex = vTheIndex;
self.vvUserName = vUserName;
self.vvVideoDetails = vVideoDetails;
self.vvVideoDate = vVideoDate;
self.vvVideoTime = vVideoTime;
self.vvVideoLink = vVideoLink;
self.vvVideoLikes = vVideoLikes;
self.vvVideoImage = vVideoImage;
self.vvDeviceToken = vDeviceToken;
}
return self;
}
My question is: How can I update the TableView when moving from DetailsView or even when I pull to refresh.
Thanks in advance

Answer 1

You are not properly reloading the data source of your UITableView.
Assuming the remote URL is getting updated with the new data, and the issue is only reloading the TableView, make sure you add your [self.tableView reloadData] AFTER loadDataFromUrl has finished.
The reloadData method will always refresh the table's content, so either it's not being called at the right time or you are not updating self.objectHolderArray. (You can debug that by setting a breakpoint after calling loadDataFromUrl after the update.)

Answer 2

on viewDidLoad lifecycle first [self.tableView reloadData] reload tableview then another work.