Question

我希望根据从url获取的图像设置UICollectionView单元格的高度。谁能帮我？我已经检查了一些库，因为他们给了单元格随机高度。 In this one随机高度给予细胞。当我尝试提供图像高度like this时，它会给出result。细胞之间有空间。

并尝试了like this，但单元格行之间没有工作空间。 see this

Answer 1

    Write in ViewDidLoad Method

    for (int i=0; i<[imageURLArray count]; i++)
        {
             //Declare Globally
            IMGArray1=[[NSMutableArray alloc] init];

            NSURLRequest *urlRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:[imageURLArray objectAtIndex:i]]];
            NSOperationQueue *urlQue = [[NSOperationQueue alloc] init];
            [NSURLConnection sendAsynchronousRequest:urlRequest queue:urlQue completionHandler:^(NSURLResponse *response,
                                                                                                 NSData *MoblieDatadata, NSError *error)
             {
                 if ([MoblieDatadata length] >0 && error == nil)
                 {
                     UIImage *image = [[UIImage alloc]initWithData:MoblieDatadata];
                     [IMGArray1 addObject:image];

                 }
                 else if ([MoblieDatadata length] == 0 && error == nil)
                 {

                     NSLog(@"Nothing was downloaded.");



                 }
                 else if (error != nil)
                 {
                     NSLog(@"Error happened = %@", error);
                     dispatch_async(dispatch_get_main_queue(), ^{


                     });
                 }
             }];


    -(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView
                     cellForItemAtIndexPath:(NSIndexPath *)indexPath
    {
        examplemycell *myCell = [collectionView
                                        dequeueReusableCellWithReuseIdentifier:@"cell"
                                        forIndexPath:indexPath];

        UIImage *image;
        int row = [indexPath row];

        image = [UIImage imageNamed:IMGArray1[row]];

        myCell.imageView.image = image;

        return myCell;
    }
    #pragma mark -
    #pragma mark UICollectionViewFlowLayoutDelegate

    -(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
    {
        UIImage *image;
        int row = [indexPath row];

        image = [UIImage imageNamed:IMGArray1[row]];

        return image.size;
    }

//For setting spacing between collectionview cells
//use the delegate method like

- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionView *)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section  
  {
    return 10; // This is the minimum inter item spacing, can be more
  }

And Use this for verticle line spacing between cells

- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section
{
    return 5;
}

Answer 2

您可以将高度设置为变量

Serializable

如果您的图片已下载，请致电： func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize { return CGSize(width: 100, height: myHeight) } }

问题是陈旧的，但仍然是实际的

UICollectionview根据图像高度设置单元格高度

2 个答案: