具有包装标签的静态表格单元的动态高度？ [英] Dynamic height for static table cells with wrapping labels?

问题描述

我的文字在纵向模式下是两行。当我切换到横向模式时，它适合单行。我通过故事板使用静态tableview单元格;如何调整行的大小以适应？

My text is two lines long in portrait mode. When I switch to landscape mode, it fits into a single line. I'm using static tableview cells via a storyboard; how can I resize the row to fit snugly?

屏幕是一个登录屏幕。

• 第一个单元格包含一些说明文字


• 第二个是用于输入帐户名称的文本字段


• 第三个是安全文本输入密码的字段


• 第四个（和最后一个）单元格包含登录按钮。键盘上的返回键提交表单或根据需要切换焦点

• The first cell contains some explanation text
• The second is a text field for entering the account name
• The third is a secure text field for entering the password
• The fourth (and last) cell contains the signin button. The return key on the keyboard submits the form or switches the focus as appropriate

推荐答案

使用 UITableView的heightForRowAtIndexPath ：

 - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
 {
   int topPadding = 10;
   int bottomPadding = 10;
   float landscapeWidth = 400;
   float portraitWidth = 300;

   UIFont *font = [UIFont fontWithName:@"Arial" size:22];

   //This is for first cell only if you want for all then remove below condition
   if (indexPath.row == 0) // for cell with dynamic height
   {
      NSString *strText = [[arrTexts objectAtIndex:indexPath.row]; // filling text in label  
     if(landscape)//depends on orientation
     {
       CGSize maximumSize = CGSizeMake(landscapeWidth, MAXFLOAT); // change width and height to your requirement
     }
     else //protrait
     {
       CGSize maximumSize = CGSizeMake(portraitWidth, MAXFLOAT); // change width and height to your requirement
     }

     //dynamic height of string depending on given width to fit
     CGSize textSize = CGSizeZero;
     if(SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")
     {
        NSMutableParagraphStyle *pstyle = [NSMutableParagraphStyle new];
        pstyle.lineBreakMode = NSLineBreakByWordWrapping;

        textSize = [[strText boundingRectWithSize:CGSizeMake(width, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName :font,NSParagraphStyleAttributeName:[pstyle copy]} context:nil] size];
     }
     else // < (iOS 7.0)
     {
        textSize = [strText sizeWithFont:font constrainedToSize:maximumSize lineBreakMode:NSLineBreakByWordWrapping] 
     }

     return (topPadding+textSize.height+bottomPadding) // caculate on your bases as u have string height
   }
   else
   {
       // return height from the storyboard
       return [super tableView:tableView heightForRowAtIndexPath:indexPath];
   }
 }

编辑 ：为>添加支持和<在iOS 7.0中不推荐使用ios7 和 sizeWithFont 方法

EDIT : Added for support for > and < ios7 and as sizeWithFont method is deprecated in iOS 7.0

这篇关于具有包装标签的静态表格单元的动态高度？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！