(NSObject, AnyObject) 不可转换为 DictionaryIndex<NSObject, AnyObject>

Question

我正致力于从 Objective-C 教程转换此委托协议函数，但在尝试使用下标访问字典中的值时遇到错误 return 基于钥匙。我不太确定这里的错误是什么意思。任何帮助将不胜感激！

// Sent to the delegate to determine whether the sign up request should be submitted to the server
func signUpViewController(signUpController: PFSignUpViewController!, shouldBeginSignUp info: [NSObject : AnyObject]!) -> Bool {
  var informationComplete: Bool = true

  // Loop through all of the submitted data
  for key in info {
    var field: String = info[key] // Error occurs at this line on info
    if field.isEmpty {
      informationComplete = false
      break
    }
  }

  // Display an alert if a field was not completed
  if !informationComplete {
    let alertView: UIAlertView = UIAlertView(title: "Missing Information", message: "Please make sure all information is filled out!", delegate: nil, cancelButtonTitle: "ok")
  }

  return informationComplete
}

Answer 1

您没有post您的声明。但您可能可以通过以下方式解决它：

for (key, field) in info {
  if field.isEmpty {
    informationComplete = false
    break
  }
}

(NSObject, AnyObject) 不可转换为 DictionaryIndex<NSObject, AnyObject>

(NSObject, AnyObject) is not convertible to DictionaryIndex<NSObject, AnyObject>

ios

parse-platform

swift