简单的推特程序无效

时间:2012-04-16 18:46:31

标签: objective-c ios xcode twitter

我正在使用本教程练习创建一个非常基本的Twitter应用程序:http://www.codeproject.com/Articles/312325/Making-a-simple-Twitter-app-using-iOS-5-Xcode-4-2#setting-up-the-table-view

我的应用程序的唯一区别是我只使用tableView ViewController。我似乎无法让这个工作。

ViewController.h

@interface ViewController : UIViewController {


NSArray *tweets;
}
-(void)fetchTweets;

@property (retain, nonatomic) IBOutlet UITableView *tableView;

@end

ViewController.m

#import "ViewController.h"
#import "Twitter/Twitter.h"

@interface ViewController ()

@end

@implementation ViewController
@synthesize tableView = _tableView;

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self fetchTweets];
}

- (void)fetchTweets
{
 dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    NSData* data = [NSData dataWithContentsOfURL:
                    [NSURL URLWithString: @"https://api.twitter.com/1/statuses/public_timeline.json"]];

    NSError* error;

    tweets = [NSJSONSerialization JSONObjectWithData:data
                                             options:kNilOptions
                                               error:&error];

    dispatch_async(dispatch_get_main_queue(), ^{
        [self.tableView reloadData];
    });
});
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return tweets.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"TweetCell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}

NSDictionary *tweet = [tweets objectAtIndex:indexPath.row];
NSString *text = [tweet objectForKey:@"text"];
NSString *name = [[tweet objectForKey:@"user"] objectForKey:@"name"];

cell.textLabel.text = text;
cell.detailTextLabel.text = [NSString stringWithFormat:@"by %@", name];

return cell;
}

- (void)viewDidUnload
{
_tableView = nil;
[self setTableView:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
}



- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
} else {
    return YES;
}
}

@end

1 个答案:

答案 0 :(得分:1)

你忘了定义代表&您的表的数据源,并且在我的代码中没有实现协议,

尝试使用.h文件:

@interface ViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>
{
    // your implementation...
}

并在viewDidLoad

中的.m文件中
self.tableView.dataSource = self;
self.tableView.delegate = self;

numberOfRowscellForRow等等方法在您定义代理人和&amp;该表的数据源:)