Resolved UIActivityIndicatorView Not Showing

RagingGoat

macrumors 6502
Original poster
Jun 21, 2010
300
14
I have a table view that loads data from JSON. I am trying to get an activity indicator working but it never appears. What am I missing?

Code:
#define kBgQueue dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
#define storeURL [NSURL URLWithString: @"https://www.googleapis.com/youtube/v3/playlistItems?part=snippet&maxResults=25&playlistId=PL9DC706DCCCE00188&key=AIzaSyBS4do208_KPGHAhszfVkHadSvtfSgr7Mo"]

#import "BBYoutubeVideosTableViewController.h"
#import "Reachability.h"
#import "TSMessage.h"
#import "TSMessageView.h"
#import "YoutubeCell.h"
#import "KFBYoutubeVideoView.h"
#import "KFBAppDelegate.h"

@interface BBYoutubeVideosTableViewController ()
{
    UIActivityIndicatorView *loadingIndicator;
}

@end

@implementation BBYoutubeVideosTableViewController
@synthesize title, videoID, thumbURL, descriptionString, url, titleArray, videoIDArray, thumbArray, descriptionArray;

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];
    
    UIImageView *backgroundImage = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"plain_app-background.png"]];
    
    CGFloat width = [[UIScreen mainScreen]bounds].size.width;
    CGFloat height = [[UIScreen mainScreen]bounds].size.height;
    
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)
    {
        loadingIndicator = [[UIActivityIndicatorView alloc]initWithFrame:CGRectMake(width / 2, height / 2, 37, 37)];
        loadingIndicator.center = CGPointMake(width / 2, height / 2 - 37);
    }
    else
    {
        loadingIndicator = [[UIActivityIndicatorView alloc]initWithFrame:CGRectMake(142, 365, 37, 37)];
    }
    
    loadingIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyleGray;
    loadingIndicator.hidesWhenStopped = YES;
    
    Reachability *networkReachability = [Reachability reachabilityForInternetConnection];
    NetworkStatus networkStatus = [networkReachability currentReachabilityStatus];
    
    if(networkStatus == NotReachable)
    {
        [TSMessage showNotificationWithTitle:@"Network Error" subtitle:@"No active network connection!" type:TSMessageNotificationTypeError];
    }
    else {
        [self.tableView addSubview:loadingIndicator];
        [loadingIndicator startAnimating];
    }
    
    self.title = @"Bluegrass & Backroads";
    
    self.tableView = [[UITableView alloc]initWithFrame:CGRectZero style:UITableViewStyleGrouped];
    self.tableView.backgroundView = backgroundImage;
    
    url = [NSURL URLWithString:@"https://www.googleapis.com/youtube/v3/playlistItems?part=snippet&maxResults=25&playlistId=PL9DC706DCCCE00188&key=AIzaSyBS4do208_KPGHAhszfVkHadSvtfSgr7Mo"];
    
    dispatch_async(kBgQueue, ^{
        NSData *data = [NSData dataWithContentsOfURL:url];
        if (data == nil)
        {
            NSLog(@"data is nil");
        }
        else
        {
            [self performSelectorOnMainThread:@selector(fetchedData:) withObject:data waitUntilDone:YES];
        }
    });
}

- (void)viewDidDisappear:(BOOL)animated
{
    [loadingIndicator stopAnimating];
}

- (void)fetchedData:(NSData *)responseData
{
    NSError *error;
    titleArray = [[NSMutableArray alloc]init];
    videoIDArray = [[NSMutableArray alloc]init];
    thumbArray = [[NSMutableArray alloc]init];
    descriptionArray = [[NSMutableArray alloc]init];
    
    NSDictionary *json = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error];
    NSArray *items = [json objectForKey:@"items"];
    
    for (NSDictionary *item in items)
    {
        NSDictionary *snippet = [item objectForKey:@"snippet"];
        title = [snippet objectForKey:@"title"];
        videoID = [[snippet objectForKey:@"resourceId"] objectForKey:@"videoId"];
        thumbURL = [[[snippet objectForKey:@"thumbnails"] objectForKey:@"default"] objectForKey:@"url"];
        descriptionString = [snippet objectForKey:@"description"];
        
        [titleArray addObject:title];
        [videoIDArray addObject:videoID];
        UIImage *thumbnailImage = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:thumbURL]]];
        [thumbArray addObject:thumbnailImage];
        [descriptionArray addObject:descriptionString];
    }
    
    [self.tableView reloadData];
    
    [loadingIndicator stopAnimating];
}

- (IBAction)morePressed:(id)sender
{
    NSURL *kyfbVideos = [NSURL URLWithString:@"https://www.youtube.com/playlist?list=PL9DC706DCCCE00188"];
    [[UIApplication sharedApplication] openURL:kyfbVideos];
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [titleArray count];
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 215;
}

- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section
{
    return 60;
}

- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section
{
    UIColor *kfbBlue = [UIColor colorWithRed:8.0/255.0f green:77.0/255.0f blue:139.0/255.0f alpha:1];
    
    UIView *footerView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, tableView.frame.size.width, tableView.frame.size.height)];
    footerView.backgroundColor = [UIColor clearColor];
    
    CGFloat width = footerView.frame.size.width;
    
    UIButton *moreButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    moreButton.backgroundColor = [UIColor clearColor];
    [moreButton setTitle:@"More" forState:UIControlStateNormal];
    [moreButton setTitleColor:kfbBlue forState:UIControlStateNormal];
    moreButton.titleLabel.textAlignment = NSTextAlignmentCenter;
    moreButton.titleLabel.font = [UIFont fontWithName:@"FranklinGothicStd-ExtraCond" size:25.0];
    moreButton.frame = CGRectMake(width / 2 - 25, 0, 50, 50);
    moreButton.layer.cornerRadius = 25.0;
    moreButton.layer.borderWidth = 2.0f;
    moreButton.layer.borderColor = kfbBlue.CGColor;
    moreButton.clipsToBounds = YES;
    moreButton.backgroundColor = [UIColor clearColor];
    [moreButton addTarget:self action:@selector(morePressed:) forControlEvents:UIControlEventTouchUpInside];
    [footerView addSubview:moreButton];
    return footerView;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UIColor *kfbBlue = [UIColor colorWithRed:8.0/255.0f green:77.0/255.0f blue:139.0/255.0f alpha:1];
    
    YoutubeCell *cell = [tableView dequeueReusableCellWithIdentifier:@"youtubeCell"];
    if (!cell)
    {
        NSArray *nibs =[[NSBundle mainBundle] loadNibNamed:@"YoutubeCell" owner:self options:NULL];
        cell = [nibs firstObject];
    }
    cell.videoTitle.text = [titleArray objectAtIndex:indexPath.row];
    cell.videoDescription.text = [descriptionArray objectAtIndex:indexPath.row];
    cell.videoThumbnail.image = [thumbArray objectAtIndex:indexPath.row];
    
    cell.videoTitle.textColor = kfbBlue;
    cell.videoDescription.textColor = kfbBlue;
    cell.videoTitle.font = [UIFont fontWithName:@"FranklinGothicStd-ExtraCond" size:22.0];
    cell.videoDescription.font = [UIFont fontWithName:@"FranklinGothicStd-ExtraCond" size:16.0];
    cell.backgroundColor = [UIColor clearColor];
    cell.selectionStyle = UITableViewCellSelectionStyleNone;
    
    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)
    {
        KFBYoutubeVideoView *videoView = [[KFBYoutubeVideoView alloc]init];
        videoView.videoIDString = [videoIDArray objectAtIndex:indexPath.row];
        videoView.videoTitle = [titleArray objectAtIndex:indexPath.row];
        videoView.videoDescription = [descriptionArray objectAtIndex:indexPath.row];
        [self.navigationController pushViewController:videoView animated:YES];
    }
    else
    {
        KFBYoutubeVideoView *videoView = [[KFBYoutubeVideoView alloc]initWithNibName:nil bundle:nil];
        videoView.videoIDString = [videoIDArray objectAtIndex:indexPath.row];
        videoView.videoTitle = [titleArray objectAtIndex:indexPath.row];
        videoView.videoDescription = [descriptionArray objectAtIndex:indexPath.row];
        
        NSMutableArray *details = [self.splitViewController.viewControllers mutableCopy];
        
        UINavigationController *detailNav = [[UINavigationController alloc]initWithRootViewController:videoView];
        
        [details replaceObjectAtIndex:1 withObject:detailNav];
        
        KFBAppDelegate *appDelegate = (KFBAppDelegate *)[[UIApplication sharedApplication]delegate];
        appDelegate.splitViewController.viewControllers = details;
        appDelegate.window.rootViewController = self.splitViewController;
        appDelegate.splitViewController.delegate = videoView;
        [appDelegate.splitViewController viewWillAppear:YES];
    }
    
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end
 
Last edited:

dejo

Moderator
Staff member
Sep 2, 2004
15,725
447
The Centennial State
What is the value of self.tableView when the following line executes?:
Code:
[self.tableView addSubview:loadingIndicator];
I suggest putting in a breakpoint at this line and using the debugger to examine its value.
 

RagingGoat

macrumors 6502
Original poster
Jun 21, 2010
300
14
This is self.tableView.

Code:
self.tableView: <UITableView: 0x7f86ec827200; frame = (0 20; 320 548); clipsToBounds = YES; autoresize = W+H; gestureRecognizers = <NSArray: 0x7f86ec0265c0>; layer = <CALayer: 0x7f86ec03e410>; contentOffset: {0, 0}; contentSize: {0, 0}>