动态UITableViewCell高度 [英] dynamic UITableViewCell height

问题描述

我试图让我的单元格根据单元格中的文本数量动态地改变高度。目前我有单词包装..但是一旦单元格有很多内容（如果它去了第3行）你看不到第二行以外的任何东西。

这是我到目前为止所做的...希望有人能看出我是否遗漏了某些东西或做错了什么...任何帮助将不胜感激。

   - （UITableViewCell *）tableView：（UITableView *）tableView cellForRowAtIndexPath：（NSIndexPath * ）indexPath 
 {
 static NSString * CellIdentifier = @Cell; 
 UILabel * label = nil; 
 
 UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier：CellIdentifier]; 
 if（cell == nil）{
 cell = [[UITableViewCell alloc] initWithStyle：UITableViewCellStyleDefault reuseIdentifier：CellIdentifier]; 
 
 label = [[UILabel alloc] initWithFrame：CGRectZero]; 
 [label setLineBreakMode：UILineBreakModeWordWrap]; 
 [label setMinimumFontSize：FONT_SIZE]; 
 [label setNumberOfLines：0]; 
 [label setFont：[UIFont systemFontOfSize：FONT_SIZE]]; 
 [label setTag：1]; 
 
 [[cell contentView] addSubview：label]; 
} 
 
 // //显示已经从startSortingTheArray中排序的数据的单元格
 NSArray * keys = [self.letterDictionary objectForKey：[self.sectionLetterArray objectAtIndex：indexPath.section ]]; 
 NSString * key = [keys objectAtIndex：indexPath.row]; 
 
 CGSize constraint = CGSizeMake（CELL_CONTENT_WIDTH  - （CELL_CONTENT_MARGIN * 2），20000.0f）; 
 
 CGSize size = [key sizeWithFont：[UIFont systemFontOfSize：FONT_SIZE] constrainedToSize：constraint lineBreakMode：UILineBreakModeWordWrap]; 
 
 if（！label）
 label =（UILabel *）[cell viewWithTag：1]; 
 
 [label setText：key]; 
 [标签setFrame：CGRectMake（CELL_CONTENT_MARGIN，CELL_CONTENT_MARGIN，CELL_CONTENT_WIDTH  - （CELL_CONTENT_MARGIN * 2），MAX（size.height，44.0f））]; 
 
 
 
 
 
 
 //将当前键值应用于单元格文本标签
 //cell.textLabel.text =键; 
返回单元格; 
} 
 
 //自动换行的单元格大小。 
  - （CGFloat）tableView：（UITableView *）tableView heightForRowAtIndexPath：（NSIndexPath *）indexPath; 
 {
 
 //显示已从startSortingTheArray 
 NSArray * keys = [self.letterDictionary objectForKey：[self.sectionLetterArray objectAtIndex：indexPath.section]]排序的数据的单元格; 
 NSString * key = [keys objectAtIndex：indexPath.row]; 
 
 NSLog（@％@，密钥）; 
 
 CGSize constraint = CGSizeMake（CELL_CONTENT_WIDTH  - （CELL_CONTENT_MARGIN * 2），20000.0f）; 
 
 CGSize size = [key sizeWithFont：[UIFont systemFontOfSize：FONT_SIZE] constrainedToSize：constraint lineBreakMode：UILineBreakModeWordWrap]; 
 
 CGFloat height = MAX（size.height，44.0f）; 
 
返回高度+（CELL_CONTENT_MARGIN * 2）; 
} 
  

更新上面的代码现在是一个工作版本...反正我:)

解决方案

重新开始并逐字逐句地学习本教程，你会没事的：
可可是我的女朋友

<实际上看起来你看过这个教程并且只是遵循了它的一部分。我仍然没有看到你设置标签的框架。

I am trying to get my cell to dynamicly change height depending on how much text is in the cell.. Currently I have the words wrapping.. but as soon as there is to much content for the cell (if it goes to a 3rd line) you cannot see anything past the 2nd line.

This is what I have so far.. hopefully someone can see if I am missing something or doing something wrong... any help would be appreciated.

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UILabel *label = nil;

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

        label = [[UILabel alloc] initWithFrame:CGRectZero];
        [label setLineBreakMode:UILineBreakModeWordWrap];
        [label setMinimumFontSize:FONT_SIZE];
        [label setNumberOfLines:0];
        [label setFont:[UIFont systemFontOfSize:FONT_SIZE]];
        [label setTag:1];

        [[cell contentView] addSubview:label];
    }

     //    //Display cells with data that has been sorted from startSortingTheArray
NSArray *keys = [self.letterDictionary objectForKey:[self.sectionLetterArray objectAtIndex:indexPath.section]];
NSString *key = [keys objectAtIndex:indexPath.row];

CGSize constraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), 20000.0f);

CGSize size = [key sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];

if (!label)
    label = (UILabel*)[cell viewWithTag:1];

[label setText:key];
[label setFrame:CGRectMake(CELL_CONTENT_MARGIN, CELL_CONTENT_MARGIN, CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), MAX(size.height, 44.0f))];






//Applise current key value to cell text label
//cell.textLabel.text = key;
return cell;
}

//Cell size for word wrapping.
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath;
{

    //Display cells with data that has been sorted from startSortingTheArray
    NSArray *keys = [self.letterDictionary objectForKey:[self.sectionLetterArray objectAtIndex:indexPath.section]];
    NSString *key = [keys objectAtIndex:indexPath.row];

    NSLog(@"%@", key);

    CGSize constraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), 20000.0f);

    CGSize size = [key sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];

    CGFloat height = MAX(size.height, 44.0f);

    return height + (CELL_CONTENT_MARGIN * 2);
}

Update the code above is now a working version.. for me anyway :)

解决方案

Start over and follow this tutorial word for word and you'll be fine: Cocoa is My Girlfriend

It actually looks like you looked at this tutorial and only followed part of it. I still don't see you setting the frame of the label though.

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