如何在iPad或iPhone上获取/计算分组的UITableView的边距宽度

Question

I have a grouped table view that I use to display several properties of a model. Those properties can be longish so I calculate the height of the cells in tableView:heightForCellAtIndexPath: using NSString's sizeWithFont:constrainedToSize:lineBreakMode: method. I'm now making the app universal so I need to pass correct cell width to this method. And I can't simply use tableView's width as it's "margins" are much wider on iPad.

The second issue with those margins I have, is that I have a custom UIView for section in that tableView and I wan't to align it's contents with cells contents.

So the question is: how do I get or calculate the width of margins in a grouped UITableView ?

Answer 1

I think you can SET width instead of calculating something like that

CGSize constraintSize;
constraintSize.height = CGFLOAT_MAX;

if (isItIpad)
constraintSize.width = 500.0f;
else if (group=1)
constraintSize.width = 250.0f;
end if 

and use it in your sizeWithFont:constrainedToSize:lineBreakMode:

or you can calculate max (or min) width in the group (sizeWithFont:) and use it

Answer 2

我在应用程序中使用了以下内容（它还支持方向更改）：

CGSize constraintSize = CGSizeMake(self.view.frame.size.width - 40.0f, MAXFLOAT);