Swift code completion isn't working

Question

I installed Xcode 6.0 beta and downloaded the iOS8 library Documentation. but when i create a Swift project, try to typing code

func aa(){
    let format = NSDateFormatter()
    var pageData = format.
}

I find Xcode can't dot any property and function. Am I missing any step?

The problem is sloved, typing a whitespace can aid code completion

Answer 1

It's append when you change the hardware type and you choose less than iphone5.

Choose Iphone 6 for example in the list at the right of the stop button and the code completion for 'format' will appear.

Answer 2

I met the same problem and solve it by removing the non-ASCII char in comment (in my problem, it's a chinese char "年" automatically generated in comment by xcode).

btw. "typing a whitespace can aid code completion" doesn't work for me