将UIWebView集成到UICollectionView（UIcollectionViewCell）中

Question

我在将UIWebView集成到UiCollectionView中时遇到了一些问题。

出现主要问题是因为UiCollectionView的委托：-

(CGSize)collectionView:(UICollectionView *)collectionView layout:   (UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath

在知道UIWebview的大小之前被调用

- (void)webViewDidFinishLoad:(UIWebView *)webView

在这里，我有2种不同的文本：short_description和long描述，需要将它们保留在UICollectionViewCell的UIWebView中。 当您点击单元格时，将显示详细说明。 再次点击将显示简短说明，依此类推。

Answer 1

在接口中声明：

@interface ProductViewController ()
{
float heightOfWebView;
float heightOfWebViewExpanded;
BOOL isArticleLoaded;
BOOL secondArticleLoaded;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    isArticleLoaded = NO;
    secondArticleLoaded = NO;
    [self customizeViewDidLoad];
}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
[cell.webViewDescription loadHTMLString:[NSString stringWithFormat:@"<html><body style=\"background-color: #ffffff; text-align: %@; font-size: %d; font-family: Roboto-Regular; color: #2D2D2D\">%@</body></html>", @"justify" ,14,myMutableString] baseURL: nil];
}

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
 if (_descriptionExpanded)
 {
  return CGSizeMake(self.view.bounds.size.width - 20, 48+heightOfWebViewExpanded);
 }else{
  return CGSizeMake(self.view.bounds.size.width - 20, 48+heightOfWebView);
 }                                                       
}

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
    if (!isArticleLoaded)
    {
        heightOfWebView = [[webView stringByEvaluatingJavaScriptFromString:@"document.height"] floatValue];
        isArticleLoaded = YES;

        NSIndexPath *indexPath = [NSIndexPath indexPathForRow:3 inSection:0];
        [self.collectionView performBatchUpdates:^{
            [self.collectionView reloadItemsAtIndexPaths:[NSArray arrayWithObjects:indexPath, nil]];
        } completion:^(BOOL finished)
         {

         }];
    }
    else if (!secondArticleLoaded && _descriptionExpanded)
    {
        heightOfWebViewExpanded = [[webView stringByEvaluatingJavaScriptFromString:@"document.height"] floatValue];
        secondArticleLoaded = YES;

        NSIndexPath *indexPath = [NSIndexPath indexPathForRow:3 inSection:0];
        [self.collectionView performBatchUpdates:^{
            [self.collectionView reloadItemsAtIndexPaths:[NSArray arrayWithObjects:indexPath, nil]];
        } completion:^(BOOL finished)
         {

         }];
    }
}

将UIWebView集成到UICollectionView（UIcollectionViewCell）中

问题描述

1 个解决方案

解决方案1
0 2015-12-31 12:05:20

将UIWebView集成到UICollectionView（UIcollectionViewCell）中

问题描述

1 个解决方案

解决方案1 0 2015-12-31 12:05:20

解决方案1
0 2015-12-31 12:05:20