方法不會覆蓋任何方法從它的超類集<NSObject>

Question

我正在看一個項目，我在幾年前在Swift 1中。在將我的代碼轉換爲Swift 3語法之後，我注意到一個錯誤，它說Method does not override any method from its superclass。我知道它是因爲Set是舊的語法，但我用什麼替換它？這是該行：

override func touchesBegan(_ touches: Set<NSObject>, with event: UIEvent) { 
    self.view.endEditing(true) 
} 

Answer 1

這種方法在斯威夫特3有變化：

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) { 
    super.touchesBegan(touches, with: event) 
} 

Reference從蘋果

Answer 2

斯威夫特3

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) { 
    super.touchesBegan(touches, with: event) 
    self.view.endEditing(true) 
}