不推荐使用'init（）'：在Swift 3中删除init（）。使用`nil`

Question

I was using this code.

var audioUnit:AudioUnit = AudioUnit()

But in Xcode 7.3 (Swift 2.2) I am getting this warning. Any idea why? And how can I get rid of that?

NB Is I use nil then my program crashes.

Answer 1

AudioUnit is a typealias of AudioComponentInstance which itself is a typealias of COpaquePointer . Initializing pointers will be removed with Swift 3.0 , just set the variable to nil .

nil and AudioUnit() should do the same thing. If your program is crashing with nil , you probably have a bug somewhere else.