iOS-UITextView中的表视图单元格未正确调整大小

我已经对一个cell类进行了子类化，并且正在使用故事板中的原型。该单元格有一个嵌入式文本视图，可以显示不同长度的文本。 我已经在HeightForRowatineXpath:中设置了单元格高度，但尝试在CellForRowatineXpath:中调整文本视图本身的大小无法正常工作。 它不会在初始加载时调整大小，但会在我将单元格从视图中滚动出来后再返回。但如果我继续前后滚动，它偶尔会再次缩小

代码：

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事实证明，使用自动布局，我只需将顶部空间和底部空间设置为superview（单元视图），由于单元格高度在heightForRowAtIndexPath中更改：文本视图将自动调整大小。

是否使用自动布局？通过在情节提要中添加文本视图并为其提供正确的约束，这将更容易实现。它会随着单元格自动增长，所以您只需要计算单元格高度。是的，我正在使用autoLayout。不过，使用它还是有点新鲜。适当的限制是什么？该单元基本上与Facebook新闻提要单元相同（顶部为用户图像/名称，中间为文本视图，底部为链接横幅视图），这正好帮助我解决了我的确切问题！非常感谢！

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    int defaultSize = 0;
    int height = 0;
    if(indexPath.section%2==0){
        defaultSize = 160;
        NSMutableDictionary *currentPost = [newsFeedPosts objectAtIndex:indexPath.section];
        NSString *string = [currentPost valueForKey:@"detailsText"];
        CGSize stringSize = [string sizeWithFont:[UIFont boldSystemFontOfSize:15] constrainedToSize:CGSizeMake(320, 9999) lineBreakMode:NSLineBreakByWordWrapping];
        height = stringSize.height + defaultSize;
        NSLog(@"String Size Before: %f",stringSize.height);

    }else{
        defaultSize = 270;
        height = defaultSize;
    }
    return height;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier;
    if(indexPath.section%2==0){
        CellIdentifier = @"NewsFeedText";
    }else{
        CellIdentifier = @"NewsFeedImage";
    }
    NewsFeedCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

    // Configure the cell...
    [cell setBackgroundView:[[NewsFeedCellBackground alloc] init]];
    [cell.bottomContainer setClipsToBounds:YES];
    [cell.bottomContainer.layer setMasksToBounds:YES];
    [cell.imagePreview.imageView setContentMode:UIViewContentModeScaleAspectFit];
    [cell.bottomContainer setFrame:CGRectMake(0, cell.contentView.frame.size.height-30, cell.contentView.frame.size.width, 30)];

    //Data Object
    NSMutableDictionary *currentPost = [newsFeedPosts objectAtIndex:indexPath.section];
    //View
    cell.userImage.image = [UIImage imageNamed:[currentPost valueForKey:@"userImage"]];
    cell.userName.text = [currentPost valueForKey:@"userName"];
    cell.createdDate.text = [currentPost valueForKey:@"createdDate"];
    cell.patientName.text = [currentPost valueForKey:@"patientName"];
    cell.detailsText.text = [currentPost valueForKey:@"detailsText"];
    [cell.imagePreview setImage:[UIImage imageNamed:[currentPost valueForKey:@"imagePreview"]] forState:UIControlStateNormal];
    [cell.viewCase addTarget:self action:@selector(displayCase:) forControlEvents:UIControlEventTouchUpInside];

    //Image
    [cell.imagePreview addTarget:self action:@selector(displayImage:) forControlEvents:UIControlEventTouchUpInside];

    //Data
    cell.viewCase.tag = [[currentPost valueForKey:@"caseID"] intValue];

    //Cell Adjustments
    NSString *string = [currentPost valueForKey:@"detailsText"];
    CGSize stringSize = [string sizeWithFont:[UIFont boldSystemFontOfSize:15] constrainedToSize:CGSizeMake(320, 9999) lineBreakMode:NSLineBreakByWordWrapping];
    NSLog(@"String Size After: %f",stringSize.height);
    [cell.detailsText setFrame:CGRectMake(cell.detailsText.frame.origin.x, cell.detailsText.frame.origin.y, cell.detailsText.frame.size.width, stringSize.height+10)];
    [cell.detailsText setBackgroundColor:[UIColor redColor]];

    return cell;
}