xcode - swift : Error with ParseUI and utf16Count not present

Question

 func signUpViewController(signUpController: PFSignUpViewController!, shouldBeginSignUp info: [NSObject : AnyObject]!) -> Bool {
    if let password = info?["password"] as?  String
    {
        return password.utf16Count >= 8
    }
    else
    {
        return false
    }
}

.utf16Count > 不存在我写了 return password.utf16 >= 8

错误::: 二元运算符 '>=' 无法应用于字符串、UTF16View' 和 'int' 类型的操作数

Answer 1

摘自 Xcode 6.3 beta 发行说明:

utf16Count is removed from String. Instead use count on the UTF16 view of the String.

所以你必须更换

return password.utf16Count >= 8

由

return count(password.utf16) >= 8