图片数组 url 到 ui collectionview

Question

我正在执行 json 查询以获取图像数组 url。我想在 uicollection 视图上显示图像。但我错过了一些东西。我想我必须通过数组进行解析并将 nsurl 设置为每个项目。然后将每一项放入nsdata。但我不确定。我也不想使用 3rd 方软件。

这是我的代码示例。

- (void)viewDidLoad {

    [super viewDidLoad];

    dispatch_async(kBgQueue, ^{
       NSData* data = [NSData dataWithContentsOfURL:
                    coProFeedURL];
       [self performSelectorOnMainThread:@selector(fetchedData:)
                           withObject:data waitUntilDone:YES];
   });
}

///new return all company data array
- (void)fetchedData:(NSData *)responseData {

   //parse out the json data
   NSError* error;
   NSDictionary* json = [NSJSONSerialization
                        JSONObjectWithData:responseData //1
                        options:kNilOptions
                        error:&error];

   NSArray * getProductsArray = [json objectForKey:@"CompanyProduct"]; //2  get all product info

   NSPredicate *predicate = [NSPredicate predicateWithFormat:@"companyID = %@", passCoData];//added create filter to only selected company


   NSArray * filteredProductArray = [getProductsArray filteredArrayUsingPredicate:predicate];//only products for selected company
  ///doing parsing here to get array of image urls

  finalImageArray = [filteredProductArray allObjects];//original
  NSLog(@" url  images :%@", finalImageArray);
  //NEED TO GET FINALIMAGEARRAY TO NSURL TYPE AND SET TO IMAGE?
}

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

  return finalImageArray.count; 
}

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

  static NSString *identifier = @"Cell";//test form file works
  ItemCollectionViewCell *cell = (ItemCollectionViewCell *)[collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];//test form file works

  ///then add the finalImageArray?    
  return cell;
}

这是我想应用于 uicollectionview 的 finalImageArray 的输出，这是日志数据： {( "http://www.test/inventory/images/bball.jpg", “http://www.test/images/bird%20tank_0.jpg” )}

我是不是漏掉了 nsurl 或 nsdata 之类的东西。我如何让这个图像数组 url 显示在 uicollectionview 上？感谢您的帮助！

Answer 1

只需使用数组的更新数据重新加载集合视图。正如您在后台线程上请求的那样。现在，您需要在主线程上重新加载数据。

- (void)fetchedData:(NSData *)responseData {

  //YOUR CODE ...

  finalImageArray = [filteredProductArray allObjects];//original
  NSLog(@" url  images :%@", finalImageArray);
  //NEED TO GET FINALIMAGEARRAY TO NSURL TYPE AND SET TO IMAGE?

  dispatch_async(dispatch_get_main_queue(), ^{

     [collectionView reloadData];
  });
}

希望对你有所帮助。

图片数组 url 到 ui collectionview

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