ios - Swift 2 upgrade Swift 3 compile error in many method such as willTransitionToTraitCollection:newCollection:withTransitionCoordinator -

when used swift 3 run old code, , convert them newest swift 3. found method compile error

    override func willtransitiontotraitcollection( newcollection: uitraitcollection,       withtransitioncoordinator coordinator: uiviewcontrollertransitioncoordinator) { } 

and compiler told me "method not override method superclass"

should import modules?

in swift editor of xcode 8 beta 3:

class myviewcontroller: uiviewcontroller {     //wait hear  ↓     willtransition } 

i have got suggestion:

class viewcontroller: uiviewcontroller {     //wait hear  ↓     override func willtransition(to newcollection: uitraitcollection, coordinator: uiviewcontrollertransitioncoordinator) {         <#code#>     } } 

(you need remove other syntax errors better suggestions.)

anyway, should not yourself. make swift it.

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new documentation willtransitiontotraitcollection:withtransitioncoordinator: here:

willtransitiontotraitcollection:withtransitioncoordinator: