UIToolbar not positioned at the bottom on device but appears ok in storyboard

问题

I'm testing the new universal storyboard in XCode 6. I basically created a view with a toolbar positioned at the bottom. When I run that basic example in the iPad the toolbar is not at the bottom

And here is in the storyboard

How can I place the UIToolbar at the bottom and using all the available width for all different screens?

回答1:

Use Autolayout. Set the left margin, right margin and bottom space constraints on the toolbar to make it dock at the bottom. Optionally, add a height constraint if you want the toolbar height to be something other than the standard 44.

Your constraints on your toolbar in the storyboard should look like this:

1:

来源：https://stackoverflow.com/questions/31987104/uitoolbar-not-positioned-at-the-bottom-on-device-but-appears-ok-in-storyboard