ios - Single line UILabel hugging not working with autoshrink -

i've uilabel following properties:

• a big font
• fixed left margin superview
• fixed right margin superview
• centered vertically
• autoshrinks minimum font size avoid truncating text as possible.
• single line
• vertical hugging priority set required (1000)

the problem i'm having label doesn't vertically hug text, can see in image bellow there's lot of space on top , bellow text.

i uploaded sample project here.

thanks!

try following code :

[self.mylabel setautoresizingmask:uiviewautoresizingflexibleleftmargin | uiviewautoresizingflexiblerightmargin | uiviewautoresizingflexibletopmargin | uiviewautoresizingflexiblebottommargin | uiviewautoresizingflexiblewidth];