Xcode Swift UIView底部栏不显示

Question

I'm a beginner in iOs development but I'm a web wedeveloper.

I was trying some small things on Xcode and I face a problem without finding solution or usefull information on the web, take a look to my UiView below

which is quite large, and has a bottom bar with Done button, and and another bar with some button.

But when I'm running the simulator, I can't see this bottom bar guide, I do have a button on it, I have an action on it, the "Hidden" field is not selected.

Any idea why it's happenning (Using Xcode 6 beta 7)?

Answer 1

将左右边界约束设置为0，并将“水平居中”约束也设置为。