1

我有一个UItablecell根据UIWebView大小调整大小的问题。

当我尝试调整我Cell的 withheightForRowAtIndexPath方法时，它不知道 webview 的大小，因为它在webViewDidFinishLoad.

我webViewDidFinishLoad用来调整 webView 的大小取决于内容。

cellForRowAtIndexPath：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{    
    NSString * documentsDirectoryPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES) objectAtIndex:0];
    static NSString *CellIdentifier = @"OtherCells";

    OtherCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) 
    {
        cell = [[OtherCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }

    NSString *path = [[NSBundle mainBundle] bundlePath];
    NSURL *baseURL = [NSURL fileURLWithPath:path];
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    cell.WebView.delegate = self;
    NSString *ImagePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.png", [NameArray objectAtIndex:indexPath.row] ]];
    [cell.WebView loadHTMLString:[NSString stringWithFormat:@"<head><body style=”background-color:transparent”&gt;<head><body id=\"foo\">\
                                  <div><img style=\"float:left;width:100px;height:50px;margin-right:10px;margin-bottom:5px;border:1px solid gray;padding:5px;\" src=\"file://%@/\">  <p id=\"test\" style=\"color:rgb(5, 85, 173);font-size:12px;font-family:\"Trebuchet MS\"\"><b>%@</b></p>  <p id=\"test2\"  style=\"position:relative;top:-7px;font-size:11px;font-family:\"Trebuchet MS\"\">%@ <br><span id=\"time\" style=\"float:right;font-size:10px;\">%@</span></p></div></body>",ImagePath,[TitleArray objectAtIndex:indexPath.row],[SummaryArray objectAtIndex:indexPath.row],[TimeStampArray objectAtIndex:indexPath.row]] baseURL:nil];
    return cell;
}

webViewDidFinishLoad

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
    OtherCell *cell = (OtherCell *)[[webView superview] superview];
    NSString *string = [webView stringByEvaluatingJavaScriptFromString:@"document.getElementById(\"test\").offsetHeight;"];
    NSString *string2 = [webView stringByEvaluatingJavaScriptFromString:@"document.getElementById(\"test2\").offsetHeight;"];
    NSString *string3 = [webView stringByEvaluatingJavaScriptFromString:@"document.getElementById(\"time\").offsetHeight;"];
    CGFloat height = [string floatValue] + [string2 floatValue] +[string3 floatValue]+ 14;

    rowHeight=height;
    CGRect frame = [webView frame];
    frame.size.height = height;
    [webView setFrame:frame];

     NSLog(@"webViewDidFinishLoad");
     //test label after webview      
    CGRect frame1= [cell.Label frame];
    frame1.origin.y = height+2;
    [cell.Label setFrame:frame1];
}
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1 回答 1

1

计算所有关于 UILabel 的字体名称、大小和中断模式的字符串大小。

CGSize maximumTitleLabelSize = CGSizeMake(280, 9999);
CGSize expectedFirstStringSize = [string sizeWithFont:cell.Label.font constrainedToSize:maximumTitleLabelSize lineBreakMode:cell.Label.lineBreakMode];
CGSize expectedSecondStringSize = [string2 sizeWithFont:cell.Label.font constrainedToSize:maximumTitleLabelSize lineBreakMode:cell.Label.lineBreakMode];
CGSize expectedThirdStringSize = [string3 sizeWithFont:cell.Label.font constrainedToSize:maximumTitleLabelSize lineBreakMode:cell.Label.lineBreakMode];

然后通过字符串的总高度为您的单元格高度创建一个新框架；

CGRect cellFrame = cell.frame;
cellFrame.size.height = expectedFirstStringSize.height + expectedSecondStringSize.height + expectedThirdStringSize.height;

最后将其分配给您的单元格；

cell.frame = cellFrame;

希望这会有所帮助。

于 2013-08-30T07:48:11.697 回答