Question

我试图让＃34;密码丢失＆＃34;工作的时候，我不输入相同的密码，我试着让＃34; helo填写所有内容＆＃34;当没有给出答案时工作。

问题在于，它跳过前两个语句，然后一直跳到最后一个警告＆＃34; AAAAA＆＃34; ..（对不起代码的第一部分......）

if(userPassword != userPasswordRepeat)
    {           
        displayAlertMessage(alarm: ("password missing"));
        return
    }
    if(userEmail == "" || userPassword == "" || userFirstName == "" || userLastName == "")
    {
        //vis alarm besked 2
        displayAlertMessage(alarm: ("helo fill everyting"));
        return
    }        

}
func displayAlertMessage(alarm:String)
{
    let myAlert = UIAlertController(title: "Alert", message: "AAAAA", preferredStyle: UIAlertControllerStyle.alert);

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


    myAlert.addAction(okAction);


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

`

Answer 1

使用参数alarm代替AAAAA

let myAlert = UIAlertController(title: "Alert", message: alarm, preferredStyle: UIAlertControllerStyle.alert);

Answer 2

似乎永远不会使用alarm中的displayAlertMessage(alarm:String)字符串，请尝试按照代码

func displayAlertMessage(alarm:String){
   //check alarm valid then use it, otherwise use default hint string
   let hintStr = alarm.characters.count > 0 ? alarm : "AAAAA"

   let myAlert = UIAlertController(title: "Alert", message: hintStr, preferredStyle: UIAlertControllerStyle.alert);

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


   myAlert.addAction(okAction);


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

Answer 3

您的副本和版本有问题;糊。你有太多不平衡的花括号。如果要显示消息，则必须将其作为参数发送给函数。

以下是代码：

if(userPassword != userPasswordRepeat)
    {           
        displayAlertMessage(alarm: "password missing");
        return
    }
    if(userEmail == "" || userPassword == "" || userFirstName == "" || userLastName == "")
    {
        //vis alarm besked 2
        displayAlertMessage(alarm: "helo fill everyting");
        return
    }        


func displayAlertMessage(alarm:String)
{
    let myAlert = UIAlertController(title: "Alert", message: alarm, preferredStyle: UIAlertControllerStyle.alert);

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


    myAlert.addAction(okAction);


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

警报信息有问题

3 个答案: