xcode 我收到连接到@IBAction func createaccountButton 的错误消息“表达式列表中的预期')'”
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im getting error message "expected ')' in expression list" connected to @IBAction func createaccountButton
提问by alex powers
@IBAction func createaccountButton(sender: AnyObject) { !Expected ')' in expression list
FIRAuth.auth()?.createUserWithEmail(emailField.text!, password: passwordField.text!, completion: { (user, error) in
if error == nil {
print("User Created")
if (FIRAuth.auth()?.currentUser) != nil
{
self.myaccountButton.alpha = 1.0
}
else
{
self.myaccountButton.alpha = 0.0
self.welcomeLabel.text = ""
}
}
}
)}
}
}
}
i cant figure out where to put ) in said expression please help ive tried everything
我不知道把 ) 放在所说的表达式中，请帮助我尝试了所有方法
回答by Frederick Jacob Ladebauche
For those who are having this problem it is because somewhere in your code you are missing a closed parenthesis ). Check the line where you are having the issue or the line before. It is because there is an open parenthesis ( for the argument but no closed parenthesis ) to close it. Make sure your closed parenthesis match the open parenthesis for the argument.
对于那些遇到此问题的人来说，这是因为在您的代码中的某处缺少一个右括号）。检查出现问题的线路或之前的线路。这是因为有一个左括号（用于参数但没有右括号）来关闭它。确保您的右括号与参数的左括号匹配。
For this specific code it's because you have an open parenthesis with no closed parenthesis to close the argument:
对于此特定代码，这是因为您有一个左括号而没有右括号来关闭参数：
(emailField.text!, password: passwordField.text!, completion: { (user, error) in
You are missing a closed parenthesis above.
您缺少上面的一个右括号。
You also have a closed parenthesis at the bottom for some reason.
出于某种原因，底部还有一个右括号。
self.welcomeLabel.text = ""
}
}
}
)} //right here is an obscure closed parenthesis
}
回答by Willjay
Missing ')' just after your password field!
缺少“)”就在您的密码字段之后！
FIRAuth.auth()?.createUserWithEmail(email!, password: password!) { (user, error) in
if let error = error {
print(error.localizedDescription)
return
}
print("User Created")
if let currentUser = FIRAuth.auth()?.currentUser {
self.myaccountButton.alpha = 1.0
} else {
self.myaccountButton.alpha = 0.0
self.welcomeLabel.text = ""
}
}
with completion, this works fine with me.
完成后，这对我来说很好用。
FIRAuth.auth()?.createUserWithEmail(email!, password: password!, completion: { (user, error) in
if let error = error {
print(error.localizedDescription)
return
}
print("User Created")
if let currentUser = FIRAuth.auth()?.currentUser {
self.myaccountButton.alpha = 1.0
} else {
self.myaccountButton.alpha = 0.0
self.welcomeLabel.text = ""
}
})
