将UIWebView转换为具有动态大小的UITableViewCell [英] UIWebView into a UITableViewCell with dynamic size

问题描述

我将 UIWebView 对象分成多个 UITableViewCell 。每个webView都有不同的大小。最初，所有细胞都是相同的高度。用户触摸单元格后，会展开以显示所有webView内容。

I have UIWebView objects into multiples UITableViewCell. Each webView has a different size. Originally, all cells are the same height. Once the user touch the cell, it expand to show all webView Content.

我正在使用 - （void）webViewDidFinishLoad：（UIWebView *）aWebView 来动态获取webView高度，和 - （CGFloat）tableView：（UITableView *）tableView heightForRowAtIndexPath：（NSIndexPath *）indexPath 来调整单元格的大小。但是， webViewDidFinishLoad 仅在调整大小方法后调用，因此，使用旧值为webView高度调整大小。

I'm using - (void) webViewDidFinishLoad:(UIWebView *)aWebView to dynamically get the webView height, and - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath to resize the cell. However, webViewDidFinishLoad is only called after the resize method, therefore, the resize is made using old values for webView height.

我试图按照所需的顺序手动调用这两种方法，但确实有效（我不认为我应该这样做，无论如何......） 。

I tried to call both methods manually in the desired order, but it did worked (I don't think that I should do this at all, anyway...).

这是我将网页视图加载到每个单元格的代码：

Here is my code for load the web view into each cell:

    [self.webView setUserInteractionEnabled:NO];
    [self.webView loadHTMLString:finalString baseURL:nil];
    [cell addSubview:self.webView];

    cell.accessoryView = accessoryLabel;
    cell.textLabel.text = nil;

    self.selectedRowIndex = indexPath.row;

    [tableView beginUpdates];
    [tableView endUpdates];
    [tableView deselectRowAtIndexPath:indexPath animated:YES];

动态获取单元格大小：

- (void) webViewDidFinishLoad:(UIWebView *)aWebView {

CGRect frame = aWebView.frame;
frame.size.height = 1;
aWebView.frame = frame;
CGSize fittingSize = [aWebView sizeThatFits:CGSizeZero];
frame.size = fittingSize;
aWebView.frame = frame;

self.cellSize = fittingSize.height;

NSLog(@"Calling webViewDidFinishLoad. Cell size value: %lf", self.cellSize);

}

要更改单元格大小：

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:    (NSIndexPath *)indexPath {

if(indexPath.row == self.selectedRowIndex) {
  NSLog(@"Resizing cell with size: %lf", self.cellSize);
    return self.cellSize + 10;
}

return 44;
}

以下是输出结果：

2015-02-24 22:59:08.902 testProject[62200:2703641] Resizing cell with size: 0.000000
2015-02-24 22:59:09.064 testProject[62200:2703641] Calling webViewDidFinishLoad. Cell size value: 501.000000

有没有办法只在之后调整单元格的大小webViewDidFinishLoad 已被执行？

Is there a way to only resize the cell after webViewDidFinishLoad has been executed?

我非常感谢任何帮助!!

I really appreciate any help!!

推荐答案

我还是不喜欢不知道为什么会这样，但我用以下方法解决了这个问题：

I still don't know why this is happing but I solved it using the following approach:

我搬了 [tableView beginUpdates] 和 [tableView endUpdates] 指示 webViewDidFinishLoad 方法。这样，只要执行 webViewDidFinishLoad ，它就会正确更新单元格大小。虽然我不认为这是最好的解决方案，但它确实有效。

I moved [tableView beginUpdates] and [tableView endUpdates] instructions to webViewDidFinishLoad method. At this way, whenever webViewDidFinishLoad be executed, it will updated the cell size correctly. Although I don't think that is the best solution, it works.

现在，我的 webViewDidFinishLoad 方法如下所示：

Now, my webViewDidFinishLoad method looks like this:

- (void) webViewDidFinishLoad:(UIWebView *)aWebView {

CGRect frame = aWebView.frame;
frame.size.height = 1;
aWebView.frame = frame;
CGSize fittingSize = [aWebView sizeThatFits:CGSizeZero];
frame.size = fittingSize;
aWebView.frame = frame;

self.cellSize = fittingSize.height;

[self.tableView beginUpdates];
[self.tableView endUpdates];

NSLog(@"Calling webViewDidFinishLoad. Cell size value: %lf", self.cellSize);

}

也许答案可以帮助其他有类似问题的人。

Perhaps the answer helps someone else with similar problems.

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