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- Xcode 8.0 bata
- Swift 3
Principle to develop
- Make UI using Storyboard
- Using IBOutlet
- Transition by Code
I did wrong way to call ViewController to transit to.
let nextVC = NextViewController() // This is bad way navigationController?.pushViewController(nextVC as UIViewController, animated: true)
In above, NextViewController is just called.
In other words, just made instance without Storyboard context information.
So NextViewController has no IBOutlet information.
This is why IBOutlet is nil.
How to overcome
**You should make instance with Storyboard context.
So use StoryboardID.**
let nextVC = storyboard?.instantiateViewController(withIdentifier: Const.StoryboardID.nextViewController) as! NextViewController navigationController?.pushViewController(nextVC as UIViewController, animated: true)
Now IBOutlet is not nil