Question

我正在尝试在集合视图中显示twitter Feed。我可以在正常的表格布局中显示twitter feed，但是当我尝试在集合视图中显示它时，我的视图控制器中没有显示任何内容。我将一个视图拖到我的视图控制器中，并将一个集合视图拖到我的视图中。这是我的故事板的视图：

 viewcontroller->View-> View1 ->CollectionView -> CollectionViewCell-> Label,ImageView

这里我在视图控制器中有两个视图。一个是我的列表视图，另一个是集合视图。我不确定我错过了什么。你能帮帮我吧吗？

提前致谢。这是我的文件：

TweetCell.h

 #import <UIKit/UIKit.h>

 @interface TweetCell : UICollectionViewCell

 @property (weak, nonatomic) IBOutlet UIImageView *imageTweet;
 @property (weak, nonatomic) IBOutlet UILabel *textTweet;

 @end

TweetCell.m

 #import "TweetCell.h"

  @implementation TweetCell

  @synthesize textTweet,imageTweet;

  - (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {

    // Initialization code
    NSArray *arrayOfViews = [[NSBundle mainBundle] loadNibNamed:@"CellID" owner:self options:nil];

    if ([arrayOfViews count] < 1) {
        return nil;
    }

    if (![[arrayOfViews objectAtIndex:0] isKindOfClass:[UICollectionViewCell class]]) {
        return nil;
    }

    self = [arrayOfViews objectAtIndex:0];

}
return self;

}
@end

ViewController.h

   #import <UIKit/UIKit.h>
   @interface ViewController :   UIViewController<UICollectionViewDataSource,UICollectionViewDelegate,UICollectionViewDelegateFlowLayout>{
IBOutlet UICollectionView *collectionViewTwitter;

}
@end

ViewController.m

#import "ViewController.h"
#import "STTwitter.h"
#import "TweetCell.h"

 @interface ViewController ()

@property (strong, nonatomic) NSMutableArray *twitterFeedList;

@end


- (void)viewDidLoad
{
    [super viewDidLoad];
    /* uncomment this block to use subclassed cells */
    [self->collectionViewTwitter registerClass:[TweetCell class] forCellWithReuseIdentifier:@"cvCell"];
    /* end of subclass-based cells block */

    // Configure layout
    UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];
    [flowLayout setItemSize:CGSizeMake(200, 200)];
    [flowLayout setScrollDirection:UICollectionViewScrollDirectionHorizontal];
    [self->collectionViewTwitter setCollectionViewLayout:flowLayout];

    STTwitterAPI *twitter = [STTwitterAPI twitterAPIAppOnlyWithConsumerKey:@"xz9ew8UZ6rz8TW3QBSDYg"
                                                            consumerSecret:@"rm8grg0aIPCUnTpgC5H1NMt4uWYUVXKPqH8brIqD4o"];

    [twitter verifyCredentialsWithSuccessBlock:^(NSString *bearerToken) {

        [twitter getUserTimelineWithScreenName:@"MYTwitterUserName"
                                  successBlock:^(NSArray *statuses) {

                                      self.twitterFeedList = [NSMutableArray arrayWithArray:statuses];

                                      [self->collectionViewTwitter reloadData];

                                  } errorBlock:^(NSError *error) {

                                      NSLog(@"%@", error.debugDescription);

                                  }];

    } errorBlock:^(NSError *error) {

        NSLog(@"%@", error.debugDescription);

    }];

 }

-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
    return 1;
}

-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {

    return  self.twitterFeedList.count;

}

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {

           static NSString *cellID =  @"CellID" ;

            NSInteger idx = indexPath.row;
            NSDictionary *t = self.twitterFeedList[idx];



    /* Uncomment this block to use subclass-based cells */
    TweetCell *cell = (TweetCell *)[collectionView dequeueReusableCellWithReuseIdentifier:cellID forIndexPath:indexPath];
    cell.textTweet.adjustsFontSizeToFitWidth=YES;
     cell.textTweet.numberOfLines=4;
    cell.textTweet.text=t[@"text"];

    cell.imageTweet.image=[UIImage imageNamed:@"twitter.png"];

    /* end of subclass-based cells block */

    // Return the cell
    return cell;

}

Answer 1

您需要确保您的收藏视图的数据源和代理已连接到文件的所有者。为此，请单击xib / storyboard文件中的集合视图。然后在右侧的连接检查器中，单击并从数据源拖动到文件的所有者。为代表做同样的事情。这样，集合视图就知道要求实现集合视图的人。或者，您可以在self.collectionView.delegate = self或self.collectionView.datasource = self中执行viewDidLoad和viewWillAppear，假设您已将您的IBOutlet与xib / storyboard文件挂钩

无法在视图控制器中看到集合视图

1 个答案: