0
override func viewDidLoad() {
super.viewDidLoad()
let ref = FIRDatabase.database().reference()
ref.observe(.value, with: {
snapshot in
self.label1.text = (snapshot.value as AnyObject)["label"] as! String
}, withCancel: {
error in
print(error.description)
})
// Do any additional setup after loading the view, typically from a nib.
}
}, withCancel: {
行顯示一個編譯器錯誤:斯威夫特無法將類型的價值預期參數類型
cannot convert value of type '(_) ->()' to expected argument type '((Error) -> Void)'
如果有這將是一個很好的答案解釋OP爲什麼會收到錯誤以及您的代碼如何解決錯誤。 – Jim