当点击UITextField时，键盘和光标都不会出现

I am testing out a simple application on Xcode 5.0.2. Using storyboard, I've dragged two view controllers that are connected by segues. On first view controller there is a button, after pressing that button next controller shows up which has two textfields. When I tap the textfield, the keyboard is not showing up and the text cursor is missing.I am testing out a simple application on Xcode