ios - How to call `setViewControllers: animated:` in Swift? -



ios - How to call `setViewControllers: animated:` in Swift? -

i seek alter view controller within navigation controller when user taps button, declared next code:

if standingsviewcontroller == nil { standingsviewcontroller = standingsviewcontroller() splitviewcontroller!.delegate = standingsviewcontroller } var vc = splitviewcontroller!.viewcontrollers[1] uinavigationcontroller vc.setviewcontrollers([standingsviewcontroller], animated: true)

however, causes error: fatal error: effort bridge implicitly unwrapped optional containing nil on lastly line.

uinavigationcontroller's setviewcontrollers: animated: method defined in swift properly, how can prepare problem?

for info when seek alter [standingsviewcontroller]!, didn't pass compiling because [anyobject] not identical [anyobject]!.

i utilize xcode 6.1 beta in swift.

looks forgot unwrap:

vc.setviewcontrollers([standingsviewcontroller!], animated: true)

instead of

vc.setviewcontrollers([standingsviewcontroller], animated: true)

ios swift uinavigationcontroller

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