moonie moonie - 7 months ago 386
Swift Question

Type "myViewController" does not conform to protocol UIPIckerDataSource in Swift

I just create a new class in Swift, it's called

myViewController
and it's a
UIViewController
.
Now I'm trying to make it a UIPickerViewDelegate and DataSource but i got a strange error

import UIKit

class myViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
...
}


It says
Type "myViewController" does not conform to protocol UIPIckerDataSource
over the UIPickerViewDataSource.

Is it a bug of Xcode-Beta 3??

Screenshot for compile-time error

Answer

You need to implement all the required methods of UIPickerViewDataSource and UIPickerViewDelegate, if you want to conform to these protocols.

Swift is more like java when it comes to protocols because if you don't implement all the required methods declared by a protocol you are going to get a compile time error instead of a run time exception.

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