Items in view not appearing on load - ios

Question

I want to load another view when I click on one of my UITableCell view, but none of the things that are on the xib file (associated with that view) are showing.
This is how I'm initializing the view (in the controller that generates the tableView):
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
self.title = #"Cards";
self.detailController = [[BasicCardViewController alloc] initWithNibName: #"CardView" bundle:nil];
}
return self;
}
This is where I deal with the selection:
- (void)tableView:(UITableView *) tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSDictionary *component = self.resultsTuples[indexPath.row];
[AJAXUtils getAsyncJsonWithUrl:(NSURL *)[NSURL URLWithString:someUrl] callback:^(NSDictionary *returnjson) {
if (returnjson != nil) {
NSString *userPageLink = returnjson[#"Node"][#"SessionInfo"][#"PostingAs"][#"Key"];
self.detailController.userPageLink = userPageLink;
self.detailController.nodePage = returnjson[#"Node"][#"Key"];
NSString *selectedCard = component[#"$element"][#"Title"];
[self.detailController setDescription:component[#"element"][#"ContactCard"][#"Description"]];
[self.detailController setPageTitle:selectedCard];
self.detailController.title = selectedCard;
NSString* rating = component[#"$element"][#"Summary"][#"AverageRating"];
self.detailController.rating =(NSInteger)rating;
[self.navigationController pushViewController:self.detailController animated:YES];
}
}];
}
This is my BasicCardView code -
#implementation BasicCardViewController
#synthesize userPageLink = _userPageLink;
#synthesize nodePage = _nodePage;
- (void)viewDidLoad {
_trendingImageView.image = [UIImage imageNamed:#"trending.png"];
}
- (UILabel *)label {
return (id)self.view;
}
- (void)loadView {
self.rateView = [[RateView alloc] init];
}
- (void)setDescription:(NSString *)description {
_description = description;
_descriptionView.text = description;
}
- (void)setPageScore:(NSString *)pageScore {
_pageScore = pageScore;
_pageScoreLabel.text = pageScore;
}
- (void)setRestaurantImage:(UIImage *)restaurantImage {
_restaurantImage.image = restaurantImage;
}
- (void)setPageTitle:(NSString *)title {
_pageTitle = title;
}
-(void)viewWillAppear:(BOOL)animated {
[super viewWillAppear: animated];
self.rateView.notSelectedStar =[UIImage imageNamed:#"kermit_empty.png"];
self.rateView.halfSelectedStar = [UIImage imageNamed:#"kermi_half.png"];
self.rateView.fullSelectedStar = [UIImage imageNamed:#"kermit_full.png"];
self.rateView.rating = self.rating;
self.rateView.editable = YES;
self.rateView.maxRating = 5;
self.rateView.delegate = self;
_pageTitleLabel.text = _pageTitle;
}
Why is nothing appearing when the cell is clicked?
But if I do self.view = rateView in the viewDidLoad, the rateView appears.

Answer 1

The view controller calls loadView method when its view property is requested but is currently nil. This method loads or creates a view and assigns it to the view property. And it appeared as if your self.view is nil, in loadView method, you have created self.rateView but hasn't assigned it to self.view to make it visible.

Answer 2

Maybe the getAsyncJsonWithUrl block called out of the main thread try, to call the pushViewController inside the mainQueue as following:
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
[self.navigationController pushViewController:self.detailController animated:YES];
}];

Answer 3

It may help sometimes.
_detailController = [[BasicCardViewController alloc] initWithNibName: #"CardView" bundle:nil];