Sometimes you write unit testing, and have to trigger UIAlertAction without user interface.
then just do following:
Extension
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| extension UIAlertAction {
typealias AlertHandler = @convention(block) (UIAlertAction) -> Void
func trigger() {
guard let block = value(forKey: "handler") else {
XCTFail("Should not be here")
return
}
let handler = unsafeBitCast(block as AnyObject, to: AlertHandler.self)
handler(self)
}
}
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Usage
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| let alertAction = UIAlertAction(title: "test", style: .default) { (action) in
print("action triggered!")
}
alertAction.trigger()
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