提示信息快速3

我不明白，如果我做错了什么或者它是Swift 3语言。提示信息快速3

我有麻烦：

使用局部变量的 “displayAlertMessage” 其声明之前。

下面是代码：

if(userPassword != userPasswordRepeat) 
    { 
     //Vis alarm besked 
     displayAlertMessage(userMessage: "passwords does not match"); 
     return 
    } 
    if(userEmail == "" || userPassword == "" || userFirstName == "" || userLastName == "") 
    { 
     //vis alarm besked 2 
     displayAlertMessage(userMessage: ("Alle fields are requred to be filled")); 
     return 
    }

来源

2016-10-10 Aske M.

'swift' or'java'？... – brso05

'displayAlertMessage'声明在哪里？ – JAL

你是否面临密码匹配代码的概率？ – vaibhav

您可以使用此功能：

//MARK: alert message 
    func alertMessage(_ userMessage:String){ 

     let myAlert = UIAlertController(title: "Sorry!", message: userMessage, preferredStyle: .alert) 


     let okAction = UIAlertAction(title: "OK", style: .default, handler: nil) 

     myAlert.addAction(okAction) 

     self.present(myAlert, animated: true, completion: nil) 

    }

，然后用它是这样的：

self.alertMessage("String you would like to display")

所以，你的代码看起来像这样：

if(userPassword != userPasswordRepeat) 
    { 
     //Vis alarm besked 
     self.alertMessage("Passwords do not match") 
     return 
    } 
    if(userEmail == "" || userPassword == "" || userFirstName == "" || userLastName == "") 
    { 
     //vis alarm besked 2 
     self.alertMessage("All fields are requred to be filled") 
     return 
    }

希望它能帮助你。

来源

2016-10-12 18:46:53

-1

let alertView:UIAlertView = UIAlertView() 
         alertView.title = "Title" 
         alertView.message = "Message" 
         alertView.delegate = self 
         alertView.addButton(withTitle: "OK") 
         alertView.show()

来源

2017-05-16 07:35:48

提示信息快速3

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