ios - 在 iOS 中验证单个文本字段中的两个值

关闭。这个问题需要details or clarity .它目前不接受答案。

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Best Answer-推荐答案

不要忘记导入 UITextFieldDelegate，如下面的代码所示。你可以这样做:

class File2: UIViewController, UITextFieldDelegate{

@IBOutlet weak var textField: UITextField!
@IBOutlet weak var label: UILabel!
var i = 0
var password = ""
var confirmPassword = ""

override func viewDidLoad() {
    super.viewDidLoad()
    textField.delegate = self
    textField.secureTextEntry = true
}

func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
    let newLength = count(textField.text.utf16) + count(string.utf16) - range.length
    if newLength == 4{
        if i == 0{
            password = textField.text!
            textField.text = ""
            textField.placeholder = "Confirm Password"
            i+=1
        }
        else if i == 1{
            confirmPassword = textField.text!
            textField.text = ""
            i = 0
            if confirmPassword == password{
                // save the password... (Your Code)
                // I know userdefaults is not a good way to store passwords, but for tutorial purposes, it's OK.
                NSUserDefaults.standardUserDefaults.setValue(password, forKey: "password")
                print("Account Succesfully Created With Password: \(password)!")
            }
        }
    }
    return newLength <= 4
    return true
}

}

读取密码:

查看 Stack Overflow 上的 UserDefaults 文档。

关于ios - 在 iOS 中验证单个文本字段中的两个值，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38851895/