嵌入在UITableViewCell中的UITextView无法正确调整大小

Question

这是我在cellForRowAtIndexPath委托中的代码：

Status *status = nil;
status = [myArray objectAtIndex:indexPath.row];
NSString* postvalue = status.statusContent;
cell.postContent.scrollEnabled = NO;

CGSize mysize = [postvalue sizeWithAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:17.0f]}];
CGRect frame = cell.postContent.frame;
frame.size.height = mysize.height;
cell.postContent.frame = frame;

cell.postContent.text = postvalue;

其中cell.postContent是textView

这是我调整单元格大小的代码：

-(CGFloat)tableView:(UITableView*)tableView heightForRowAtIndexPath:(NSIndexPath*)indexPath {
   Status *status = nil;
   status = [myArray objectAtIndex:indexPath.row];
   NSString* postvalue = status.statusContent;

   return 100 + [self heightForText:postvalue];
}


-(CGFloat)heightForText:(NSString *)text
{
   NSInteger MAX_HEIGHT = 2000;
   UITextView * textView = [[UITextView alloc] initWithFrame: CGRectMake(0, 0, 226, MAX_HEIGHT)];
   textView.text = text;
   textView.font = [UIFont systemFontOfSize:17.0f];// your font
   [textView sizeToFit];

   return textView.frame.size.height;
}

结果如下：

我已经用cellForRow ..委托中计算的高度替换了用户名，因此您可以看到高度计算正确，单元格调整正确，但是textview却不正确-行数比您多没看到 有任何想法吗？

谢谢

Answer 1

这是因为您不应该创建新的textField（您也忘记将其添加为子视图），而是要调整单元格的出口大小。 创建单元格时，尝试在cellForRow中设置textField的高度

Answer 2

UITextView在其周围采用了一些默认填充，因此这可能是有问题的。 通过代码设置UITextView的contentInset 。

// this is how we define setContentInset method
[textView setContentInset:UIEdgeInsetsMake(CGFloat top, CGFloat left, CGFloat bottom, CGFloat right)];

// and you should do like this
[textView setContentInset:UIEdgeInsetsMake(-8, -8, -8 ,-8)];

Answer 3

您可以访问它的内容视图，我认为，这是代码，我正在使用一些值对其进行测试，可以很好地工作，经历这种希望可以帮助您... :)

禁用文本框的自动布局

在CustomCelll.h文件中

   @interface CustomCelll : UITableViewCell
   //i think u hav an outlet for textview
   @property (retain, nonatomic) IBOutlet UITextView *postContent;
   @property (nonatomic,retain)NSString *message;//you get the message to set the height

   in CustomCelll.m file

   @implementation CustomCelll
   @synthesize postContent;
   @synthesize imageView;
   - (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
  {
      self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
      if (self) {
      //heare i am adding the button
        UIFont *font = [UIFont systemFontOfSize:17.0f];
        self.postContent.frame = CGRectZero;//initially set it zero
        self.postContent.font = font;
        }
      return self;

  }

   - (void)layoutSubviews
    {
     [super layoutSubviews];
     CGSize size = [self findMessgeStringHeight];//you can ge the size
     //set frame for ur label
     self.postContent.frame = CGRectMake(103, 8, size.width + 10,size.height + 10);//set the height here(for your case) and disable auto layout  
     self.postContent.text = self.message;//set the message
   }

  - (CGSize)findMessgeStringHeight
   {

         NSAttributedString *attributedText = [[NSAttributedString alloc] initWithString:self.message attributes:@{ NSFontAttributeName:[UIFont systemFontOfSize:17.0f] }];
        CGRect rect = [attributedText boundingRectWithSize:(CGSize){225, MAXFLOAT}
                                           options:NSStringDrawingUsesLineFragmentOrigin
                                           context:nil];
        CGSize requiredSize = rect.size;

       return requiredSize; //finally u return your height
  }


   //in your controller

   -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
   {
    CustomCelll *cell = [tableView dequeueReusableCellWithIdentifier:@"BDCustomCell"];
    if (cell == nil) {
    NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"Empty" owner:self options:nil];
    cell = [topLevelObjects objectAtIndex:0];
     }
   cell.message = @"hello, how are u, it been so long since we met, how's the weather there, here too cold, i am going to my mom's home may be i will stay there for 2 or 3 weeks";
   return cell;
   }

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

      NSString *str = @"hello, how are u, it been so long since we met, how's the weather there, here too cold, i am going to my mom's home may be i will stay there for 2 or 3 weeks";//use same  sring to get the height

     NSAttributedString *attributedText = [[NSAttributedString alloc] initWithString:str attributes:@{ NSFontAttributeName:[UIFont systemFontOfSize:17.0f]
 }];
     CGRect rect = [attributedText boundingRectWithSize:(CGSize){225, MAXFLOAT}
                                           options:NSStringDrawingUsesLineFragmentOrigin
                                           context:nil];
     CGSize requiredSize = rect.size;
     return requiredSize.height + 30;
   }