[英]How to get this func to work Swift
我有2個功能
func checkEmailField() -> Bool {
if(!loginPasswordTextField.text!.isEmpty){
return true
} else {
print("Empty Field was found")
// self.displayMessage(error.localizedDescription, fromViewController: self)
return false
}
}
和
func displayMessage(errorMessage:String?, fromViewController:UIViewController){
let titleMessage = "Error"
let alert = UIAlertController(title: titleMessage, message: errorMessage, preferredStyle: .Alert)
let actionOK = UIAlertAction(title: "Ok", style: .Default, handler: nil)
alert.addAction(actionOK)
fromViewController.presentViewController(alert, animated: true, completion: nil)
}
當我在第一個func()中取消注釋該行時,出現錯誤未解決的標識符錯誤...我該如何通過錯誤使其有效?
因為您沒有名為error
的變量。 您的displayMessage
函數需要一個字符串,因此只需將其傳遞給一個字符串即可:
func checkEmailField() -> Bool {
if(!loginPasswordTextField.text!.isEmpty){
return true
} else {
print("Empty Field was found")
self.displayMessage("Empty field was found", fromViewController: self)
return false
}
}
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