@Alexander Stolte I have one finding. If we keep label content blank in design view then unless and until screen orientation is not changed label will not show any content.
I have uploaded project once again. Please follow these steps to understand my point...
1) Click button so that label text will be updated
2) Label contain will be nil
3) move the screen (let resize event occur) then label will show the content.
Please suggest what can be done.