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POJSON Data in Table View iOS
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  1. POJSON Data in Table View iOS
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    copied!<p>I have to add a Tab in a Tabbar Controller in an iPhone App with a table view what is showing JSON data. </p> <p>My Problem is now that i see the table view but no data. Here is my code:</p> <p>.h File</p> <pre><code>#import &lt;UIKit/UIKit.h&gt; @interface FourthViewController : UIViewController &lt;UITableViewDataSource, UITableViewDelegate&gt; @property (strong, nonatomic) IBOutlet UITableView *myTableView; @property (nonatomic, strong) NSArray *tweets; @end </code></pre> <p>.m File</p> <pre><code>#import "FourthViewController.h" @interface FourthViewController () @end @implementation FourthViewController @synthesize myTableView; @synthesize tweets; - (void)viewDidLoad { [super viewDidLoad]; // Issue load request after the view has been loaded. [self issueLoadRequest]; } - (void)viewDidUnload { [self setMyTableView:nil]; [super viewDidUnload]; } - (void)issueLoadRequest { // Dispatch this block asynchronosly. The block gets JSON data from the specified URL and performs the proper selector when done. dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ NSData* data = [NSData dataWithContentsOfURL:[NSURL URLWithString:@"https://api.twitter.com/1/statuses/user_timeline.json?screen_name=jmenter&amp;count=10"]]; [self performSelectorOnMainThread:@selector(receiveData:) withObject:data waitUntilDone:YES]; }); } - (void)receiveData:(NSData *)data { // When we have the data, we serialize it into native cocoa objects. (The outermost element from twitter is // going to be an array. I JUST KNOW THIS. Reload the tableview once we have the data. self.tweets = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil]; [self.myTableView reloadData]; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return self.tweets.count; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = [[UITableViewCell alloc] init]; // The element in the array is going to be a dictionary. I JUST KNOW THIS. The key for the tweet is "text". NSDictionary *tweet = [self.tweets objectAtIndex:indexPath.row]; cell.textLabel.text = [tweet objectForKey:@"text"]; cell.textLabel.font = [UIFont boldSystemFontOfSize:11]; cell.textLabel.numberOfLines = 3; return cell; } - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { // Spit out some pretty JSON for the tweet that was tapped. Neato. NSString *formattedJSON = [[NSString alloc] initWithData:[NSJSONSerialization dataWithJSONObject:[self.tweets objectAtIndex:indexPath.row] options:NSJSONWritingPrettyPrinted error:nil] encoding:NSUTF8StringEncoding]; NSLog(@"tweet:\n%@", formattedJSON); } @end </code></pre> <p>I have used this tut here: <a href="http://jeffmenter.wordpress.com/2012/05/30/json-ios-5-go/" rel="nofollow">http://jeffmenter.wordpress.com/2012/05/30/json-ios-5-go/</a></p>
 

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