blocks|key|5494688|text|在iOS+12中，苹果引入了名为Security+Code+AutoFill的功能。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5494689|要在你的应用程序中使用它，你只需要设置UITextField的输入视图的textContentType属性oneTimeCode。|5494690|otpTextField.textContentType+=+.oneTimeCode|code-block|syntax|javascript|5494691|注释：安全代码AutoFill将只与系统键盘一起工作，它不会与自定义键盘一起工作。|BOLD|5494692|WWDC+video|5494693|当你获得OTP时，它看起来像这样：|5494694|​|5494695|📷|atomic|5494696|5494697|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.apple.com/videos/play/wwdc2018/204/|1|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/8872beac65cfeb65eec8bd291a3dd6a9.png|imageAlt^0|G|M|0|J|B|10|F|1H|B|0|0|0|2|0|0|A|0|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|1D|8|@$9|1E|A|1F|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1G|8|@$9|1H|A|1I|B|C]|$9|1J|A|1K|B|C]|$9|1L|A|1M|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|1N|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|1O|8|@$9|1P|A|1Q|B|O]]|D|@]|E|$]]|$1|P|3|Q|5|6|7|1R|8|@]|D|@$9|1S|A|1T|1|1U]]|E|$]]|$1|R|3|S|5|6|7|1V|8|@]|D|@]|E|$]]|$1|T|3|U|5|6|7|1W|8|@]|D|@]|E|$]]|$1|V|3|W|5|X|7|1X|8|@]|D|@$9|1Y|A|1Z|1|20]]|E|$]]|$1|Y|3|U|5|6|7|21|8|@]|D|@]|E|$]]|$1|Z|3|-4|5|6|7|22|8|@]|D|@]|E|$]]]|10|$11|$5|12|13|14|E|$15|16]]|17|$5|18|13|19|E|$1A|1B|1C|-4]]]]

In iOS 12 Apple has introduced feature called <code>Security Code AutoFill</code>.

To use this in your app all you need to do is set <code>UITextField</code>'s input view’s <code>textContentType</code> property <code>oneTimeCode</code>. 

<pre><code>otpTextField.textContentType = .oneTimeCode
</code></pre>

NOTE: Security Code AutoFill will only works with System Keyboard it will not work with custom keyboard.

<a href="https://developer.apple.com/videos/play/wwdc2018/204/" rel="noreferrer">WWDC video</a> 

When you get OTP it will look something like this:

<a href="https://i.stack.imgur.com/9QoVj.png" rel="noreferrer"><img src="https://i.stack.imgur.com/9QoVj.png" alt="enter image description here"></a>

blocks|key|1966029|text|同样重要的是，你收到的短信要包含一些带有"code“的东西，比如|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1966030|1966031|“您的密码是:123456”|blockquote|1966032|1966033|1966034|或|1966035|1966036|+"12345是您的登录代码“|1966037|1966038|1966039|沿着这条线的东西。|1966040|不是！|offset|length|style|BOLD|1966041|1966042|你的应用:+12345|1966043|1966044|1966045|您可以通过轻触信息中带下划线的代码来验证文字信息中的代码是否适用于.oneTimeCode类型。如果弹出一个对话框，上面写着“复制代码”，那么你就可以继续了。否则，您可能需要更改消息的文本。|1966046|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0|3|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|15|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|16|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|17|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|18|8|@]|9|@]|A|$]]|$1|G|3|-4|5|6|7|19|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|1A|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]|$1|K|3|L|5|E|7|1C|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1F|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1G|8|@$S|1H|T|1I|U|V]]|9|@]|A|$]]|$1|W|3|-4|5|6|7|1J|8|@]|9|@]|A|$]]|$1|X|3|Y|5|E|7|1K|8|@]|9|@]|A|$]]|$1|Z|3|-4|5|6|7|1L|8|@]|9|@]|A|$]]|$1|10|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]|$1|11|3|12|5|6|7|1N|8|@]|9|@]|A|$]]|$1|13|3|-4|5|6|7|1O|8|@]|9|@]|A|$]]]|14|$]]

It is also important that the text message you receive contains something with "code" like 

<blockquote>
 "your passcode is:123456"
</blockquote>

or

<blockquote>
 "12345 is your code to log in"
</blockquote>

something along that line.

NOT!

<blockquote>
 Your App: 12345
</blockquote>

you can verify if the code in your text message will work with the .oneTimeCode type by tapping the underlined code in your message. If a dialog pops up that says "copy code", you are good to go. Otherwise you might need to change the text of your message.

blocks|key|1965895|text|更新|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1965896|从iOS+12开始，苹果将在UITextField、UITextView和任何采用UITextInput协议的自定义视图上支持Password+AutoFill。系统键盘将其上的textContentType设置为.oneTimeCode|1965897|1)使用代码|1965898|singleFactorCodeTextField.textContentType+=+.oneTimeCode|CODE|1965899|2)使用故事板/XIB|1965900|1965901|选择UITextField/UITextView在storyboard/XIB中单击单击属性检查器。转到文本输入特征，单击内容类型并选择一次性代码和完成。|blockquote|1965902|1965903|1965904|操作系统将使用此UITextContentType设置自动检测消息中的验证码。|1965905|1965906|警告|1965907|1965908|如果对安全代码输入文本字段使用自定义输入视图，则iOS无法显示必要的AutoFill+UI。|1965909|1965910|​|1965911|📷|atomic|1965912|1965913|有关更多信息，您可以在Apple+developer+上查看|1965914|还可以查看并跳转到24:28以自动预填充动态口令。|1965915|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/c47674c7ce1197319f0e7d5aca837177.png|imageAlt^0|0|2|0|E|14|2Z|C|0|0|6|0|0|1K|0|0|B|0|0|2|B|E|A|P|E|0|0|0|8|H|0|0|0|0|0|0|0|0|1|0|0|0|0|9|5|0^^$0|@$1|2|3|4|5|6|7|1M|8|@$9|1N|A|1O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1P|8|@$9|1Q|A|1R|B|C]|$9|1S|A|1T|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1U|8|@$9|1V|A|1W|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|1X|8|@$9|1Y|A|1Z|B|L]]|D|@]|E|$]]|$1|M|3|N|5|6|7|20|8|@$9|21|A|22|B|C]]|D|@]|E|$]]|$1|O|3|-4|5|6|7|23|8|@]|D|@]|E|$]]|$1|P|3|Q|5|R|7|24|8|@$9|25|A|26|B|L]|$9|27|A|28|B|L]|$9|29|A|2A|B|L]]|D|@]|E|$]]|$1|S|3|-4|5|6|7|2B|8|@]|D|@]|E|$]]|$1|T|3|-4|5|6|7|2C|8|@]|D|@]|E|$]]|$1|U|3|V|5|6|7|2D|8|@$9|2E|A|2F|B|L]]|D|@]|E|$]]|$1|W|3|-4|5|6|7|2G|8|@]|D|@]|E|$]]|$1|X|3|Y|5|R|7|2H|8|@]|D|@]|E|$]]|$1|Z|3|-4|5|6|7|2I|8|@]|D|@]|E|$]]|$1|10|3|11|5|6|7|2J|8|@]|D|@]|E|$]]|$1|12|3|-4|5|6|7|2K|8|@]|D|@]|E|$]]|$1|13|3|14|5|6|7|2L|8|@]|D|@]|E|$]]|$1|15|3|16|5|17|7|2M|8|@]|D|@$9|2N|A|2O|1|2P]]|E|$]]|$1|18|3|14|5|6|7|2Q|8|@]|D|@]|E|$]]|$1|19|3|1A|5|6|7|2R|8|@]|D|@]|E|$]]|$1|1B|3|1C|5|6|7|2S|8|@$9|2T|A|2U|B|C]]|D|@]|E|$]]|$1|1D|3|-4|5|6|7|2V|8|@]|D|@]|E|$]]]|1E|$1F|$5|1G|1H|1I|E|$1J|1K|1L|-4]]]]

UPDATE

From iOS 12 Apple will supports Password AutoFill on UITextField, UITextView, and any custom view that adopts the UITextInput protocol. System keyboard set the textContentType on it to .oneTimeCode

1) Using Code

<code>singleFactorCodeTextField.textContentType = .oneTimeCode</code>

2) Using Storyboard/XIB

<blockquote>
 Select <code>UITextField</code>/<code>UITextView</code> in <code>storyboard/XIB</code> click Click on Attribute
 inspector. Go to text input trait, click to Content type and select
 one time code and done.
</blockquote>

The operating system will detect verification codes from Messages automatically with this <code>UITextContentType</code> set.

<blockquote>
 Warning
 
 If you use a custom input view for a security code input text field,
 iOS cannot display the necessary AutoFill UI.
</blockquote>

<a href="https://i.stack.imgur.com/muEaW.png" rel="noreferrer"><img src="https://i.stack.imgur.com/muEaW.png" alt="WWDC 2018 iPhoneX Device"></a>

For more information, you can check it on the Apple developer <a href="https://developer.apple.com/documentation/uikit/uitextcontenttype/2980930-onetimecode" rel="noreferrer">oneTimeCode</a>

And also review <a href="https://developer.apple.com/videos/play/wwdc2018/204/" rel="noreferrer">WWDC 2018 Session 204 - Automatic Strong Passwords and Security Code AutoFill</a> and jump to 24:28 for automatic pre-fill the OTP.

blocks|key|5494646|text|目前，对于iOS+12及更高版本，您可以使用Security+Code+Autofill|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|5494647|oneTimeCodeTextField.textContentType+=.oneTimeCode|code-block|syntax|javascript|5494648|然而，从iOS+11开始，ApplePay就开始进行自动验证，但开发人员还不能使用。|5494649|​|5494650|📷|atomic|5494651|5494652|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.apple.com/videos/play/wwdc2018/204|1|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/58b2cb0ce63774a2b2af8b0b10cbf14d.gif|imageAlt^0|M|M|0|0|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@$A|15|B|16|1|17]]|C|$]]|$1|D|3|E|5|F|7|18|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|19|8|@]|9|@]|C|$]]|$1|K|3|L|5|6|7|1A|8|@]|9|@]|C|$]]|$1|M|3|N|5|O|7|1B|8|@]|9|@$A|1C|B|1D|1|1E]]|C|$]]|$1|P|3|L|5|6|7|1F|8|@]|9|@]|C|$]]|$1|Q|3|-4|5|6|7|1G|8|@]|9|@]|C|$]]]|R|$S|$5|T|U|V|C|$W|X]]|Y|$5|Z|U|10|C|$11|12|13|-4]]]]

Currently for iOS 12 and above, you may use <a href="https://developer.apple.com/videos/play/wwdc2018/204" rel="nofollow noreferrer">Security Code Autofill</a>

<pre><code>oneTimeCodeTextField.textContentType =.oneTimeCode
</code></pre>

However ApplePay is doing automatic verification since iOS 11 but that is not yet available to developers.

<img src="https://i.stack.imgur.com/gJ6AH.gif" width="350" />

blocks|key|4076616|text|在Xamarin+iOS中，针对>=iOS+12：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4076617|首先，短信需要在其消息中包含关键字代码“”或"passcode"，并且不能在代码之后使用空格。如果您收到短信，并且您有按钮“复制代码”，那么它将工作|offset|length|style|BOLD|4076618|​|4076619|📷|atomic|4076620|4076621|然后，您需要放置以下内容：|4076622|_txtField+=+new+UITextField()
{
+++UserInteractionEnabled+=+true,
};
if+(UIDevice.CurrentDevice.CheckSystemVersion(12,+0))
{
++_txtField.TextContentType+=+UITextContentType.OneTimeCode;++++++++++
}
_txtFieldDelegate+=+new+UITextFieldDelegate();
_txtField.Delegate+=+_txtFieldDelegate;
_txtField.BecomeFirstResponder();|code-block|syntax|javascript|4076623|注:安全代码AutoFill仅适用于系统键盘(不适用于自定义)。|4076624|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/904b0a30de1e74c674036673b9860744.png|imageAlt^0|0|K|C|Z|5|1P|6|0|0|0|1|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|15|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|16|8|@$D|17|E|18|F|G]|$D|19|E|1A|F|G]|$D|1B|E|1C|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|1D|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|1E|8|@]|9|@$D|1F|E|1G|1|1H]]|A|$]]|$1|M|3|I|5|6|7|1I|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1J|8|@]|9|@]|A|$]]|$1|P|3|Q|5|R|7|1K|8|@]|9|@]|A|$S|T]]|$1|U|3|V|5|6|7|1L|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]]|X|$Y|$5|Z|10|11|A|$12|13|14|-4]]]]

In Xamarin iOS, for >=iOS 12:

First of all, the SMS need to have the keyword "code" or "passcode" into their message, and don't use spaces after the code. if you received the SMS and you have the button "Copy Code" then it will works 

<a href="https://i.stack.imgur.com/it5Wb.png" rel="noreferrer"><img src="https://i.stack.imgur.com/it5Wb.png" alt="enter image description here"></a>

Then you need to place this:

<pre><code>_txtField = new UITextField()
{
 UserInteractionEnabled = true,
};
if (UIDevice.CurrentDevice.CheckSystemVersion(12, 0))
{
 _txtField.TextContentType = UITextContentType.OneTimeCode; 
}
_txtFieldDelegate = new UITextFieldDelegate();
_txtField.Delegate = _txtFieldDelegate;
_txtField.BecomeFirstResponder();
</code></pre>

NOTE: Security Code AutoFill will only works with System Keyboard (not custom).

blocks|key|5494903|text|Also...on手机的“自动填写密码”需要打开。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5494904|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Also...on the phone "Autofill Passwords" needs to be turned on.

blocks|key|4076741|text|我从santosh+kumar和Ted的答案中得到了解决方案|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4076742|var+otpText+=+String()|code-block|syntax|javascript|4076743|viewDidload()中的|style|CODE|4076744|unordered-list-item|4076745|4076746|+++++if+#available(iOS+12.0,+*)+{
+++++++++txtFirst.textContentType+=+.oneTimeCode
+++++++++txtSecond.textContentType+=+.oneTimeCode
+++++++++txtThird.textContentType+=+.oneTimeCode
+++++++++txtForth.textContentType+=+.oneTimeCode
+++++++++txtFifth.textContentType+=+.oneTimeCode
+++++}

+++++txtFirst.addTarget(self,+action:+#selector(self.textFieldDidChange(textField:)),+for:+.editingChanged)
+++++txtSecond.addTarget(self,+action:+#selector(self.textFieldDidChange(textField:)),+for:+.editingChanged)
+++++txtThird.addTarget(self,+action:+#selector(self.textFieldDidChange(textField:)),+for:+.editingChanged)
+++++txtForth.addTarget(self,+action:+#selector(self.textFieldDidChange(textField:)),+for:+.editingChanged)
+++++txtFifth.addTarget(self,+action:+#selector(self.textFieldDidChange(textField:)),+for:+.editingChanged)
+++++txtFirst.becomeFirstResponder()+//by+doing+this+it+will+open+the+keyboard+on+first+text+field+automatically|4076747|用于TextField+的|4076748|Action|BOLD|4076749|4076750|+++//When+changed+value+in+textField
++++@objc+func+textFieldDidChange(textField:+UITextField){
++++++++let+text+=+textField.text
++++++++if++text?.count+==+1+{
++++++++++++switch+textField{

++++++++++++case+txtFirst:
++++++++++++++++txtSecond.becomeFirstResponder()
++++++++++++case+txtSecond:
++++++++++++++++txtThird.becomeFirstResponder()
++++++++++++case+txtThird:
++++++++++++++++txtForth.becomeFirstResponder()
++++++++++++case+txtForth:
++++++++++++++++txtFifth.becomeFirstResponder()
++++++++++++case+txtFifth:
++++++++++++++++txtFifth.resignFirstResponder()
++++++++++++++++self.dismissKeyboard()
++++++++++++default:
++++++++++++++++break
++++++++++++}
++++++++}
++++++++if++text?.count+==+0+{
++++++++++++switch+textField{
++++++++++++case+txtFirst:
++++++++++++++++txtFirst.becomeFirstResponder()
++++++++++++case+txtSecond:
++++++++++++++++txtFirst.becomeFirstResponder()
++++++++++++case+txtThird:
++++++++++++++++txtSecond.becomeFirstResponder()
++++++++++++case+txtForth:
++++++++++++++++txtThird.becomeFirstResponder()
++++++++++++case+txtFifth:
++++++++++++++++txtForth.becomeFirstResponder()
++++++++++++default:
++++++++++++++++break
++++++++++++}
++++++++}
++++++++else{

++++++++}
++++}|4076751|KeyBoard不适用于|4076752|OTP字符串和|4076753|4076754|+func+dismissKeyboard(){

++++++++self.otpText+=+"\(self.txtFirst.text+??+"")\(self.txtSecond.text+??+"")\(self.txtThird.text+??+"")\(self.txtForth.text+??+"")\(self.txtFifth.text+??+"")"

++++++++print(self.otpText)
++++++++self.view.endEditing(true)

++++}|4076755|最重要的事情：如果你使用的是shouldChangeCharactersIn方法，请对其进行注释。否则此代码将无法工作|4076756|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/51170039/11077258|1|https://stackoverflow.com/a/47195674/11077258^0|2|D|0|G|3|1|0|0|0|D|0|0|0|0|2|9|0|0|6|0|0|0|0|0|0|0|0|1N|E|O|0^^$0|@$1|2|3|4|5|6|7|1I|8|@]|9|@$A|1J|B|1K|1|1L]|$A|1M|B|1N|1|1O]]|C|$]]|$1|D|3|E|5|F|7|1P|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|1Q|8|@$A|1R|B|1S|K|L]]|9|@]|C|$]]|$1|M|3|-4|5|N|7|1T|8|@]|9|@]|C|$]]|$1|O|3|-4|5|6|7|1U|8|@]|9|@]|C|$]]|$1|P|3|Q|5|F|7|1V|8|@]|9|@]|C|$G|H]]|$1|R|3|S|5|6|7|1W|8|@$A|1X|B|1Y|K|L]]|9|@]|C|$]]|$1|T|3|U|5|N|7|1Z|8|@$A|20|B|21|K|V]]|9|@]|C|$]]|$1|W|3|-4|5|6|7|22|8|@]|9|@]|C|$]]|$1|X|3|Y|5|F|7|23|8|@]|9|@]|C|$G|H]]|$1|Z|3|10|5|6|7|24|8|@]|9|@]|C|$]]|$1|11|3|12|5|N|7|25|8|@]|9|@]|C|$]]|$1|13|3|-4|5|6|7|26|8|@]|9|@]|C|$]]|$1|14|3|15|5|F|7|27|8|@]|9|@]|C|$G|H]]|$1|16|3|17|5|6|7|28|8|@$A|29|B|2A|K|V]|$A|2B|B|2C|K|L]]|9|@]|C|$]]|$1|18|3|-4|5|6|7|2D|8|@]|9|@]|C|$]]]|19|$1A|$5|1B|1C|1D|C|$1E|1F]]|1G|$5|1B|1C|1D|C|$1E|1H]]]]

I've got sollution from answer of <a href="https://stackoverflow.com/a/51170039/11077258">santosh kumar</a> and <a href="https://stackoverflow.com/a/47195674/11077258">Ted</a>

<pre><code>var otpText = String()
</code></pre>

<ul>
<li>in <code>viewDidload()</code></li>
</ul>

<pre><code> if #available(iOS 12.0, *) {
 txtFirst.textContentType = .oneTimeCode
 txtSecond.textContentType = .oneTimeCode
 txtThird.textContentType = .oneTimeCode
 txtForth.textContentType = .oneTimeCode
 txtFifth.textContentType = .oneTimeCode
 }

 txtFirst.addTarget(self, action: #selector(self.textFieldDidChange(textField:)), for: .editingChanged)
 txtSecond.addTarget(self, action: #selector(self.textFieldDidChange(textField:)), for: .editingChanged)
 txtThird.addTarget(self, action: #selector(self.textFieldDidChange(textField:)), for: .editingChanged)
 txtForth.addTarget(self, action: #selector(self.textFieldDidChange(textField:)), for: .editingChanged)
 txtFifth.addTarget(self, action: #selector(self.textFieldDidChange(textField:)), for: .editingChanged)
 txtFirst.becomeFirstResponder() //by doing this it will open the keyboard on first text field automatically

</code></pre>

<ul>
<li>Action for <code>TextField</code> </li>
</ul>

<pre><code> //When changed value in textField
 @objc func textFieldDidChange(textField: UITextField){
 let text = textField.text
 if text?.count == 1 {
 switch textField{

 case txtFirst:
 txtSecond.becomeFirstResponder()
 case txtSecond:
 txtThird.becomeFirstResponder()
 case txtThird:
 txtForth.becomeFirstResponder()
 case txtForth:
 txtFifth.becomeFirstResponder()
 case txtFifth:
 txtFifth.resignFirstResponder()
 self.dismissKeyboard()
 default:
 break
 }
 }
 if text?.count == 0 {
 switch textField{
 case txtFirst:
 txtFirst.becomeFirstResponder()
 case txtSecond:
 txtFirst.becomeFirstResponder()
 case txtThird:
 txtSecond.becomeFirstResponder()
 case txtForth:
 txtThird.becomeFirstResponder()
 case txtFifth:
 txtForth.becomeFirstResponder()
 default:
 break
 }
 }
 else{

 }
 }
</code></pre>

<ul>
<li>OTP String and Dismiss KeyBoard</li>
</ul>

<pre><code> func dismissKeyboard(){

 self.otpText = "\(self.txtFirst.text ?? "")\(self.txtSecond.text ?? "")\(self.txtThird.text ?? "")\(self.txtForth.text ?? "")\(self.txtFifth.text ?? "")"

 print(self.otpText)
 self.view.endEditing(true)

 }
</code></pre>

Most important thing: if you are using <code>shouldChangeCharactersIn</code> method, please comment it. Else this code will not work

blocks|key|1965986|text|你可以很容易地在Storyboard中设置它|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1965987|​|1965988|📷|atomic|offset|length|1965989|1965990|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/b7f289d584e4e64e4f1a734bd0e6d43d.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@$G|V|H|W|1|X]]|A|$]]|$1|I|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q|R|-4]]]]

you can easily set this in Storyboard

<a href="https://i.stack.imgur.com/dYgED.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dYgED.png" alt="Click on Attribute inspector. Go to text input trait, click on Content type and select one time code"></a>

blocks|key|1603833|text|你可以从你的消息中获取动态口令。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1603834|otptextField.textContentType+=+.oneTimeCode|code-block|syntax|javascript|1603835|请从他的链接获得该项目。|1603836|https://github.com/karthickkck315/Automatic-OTP|offset|length|1603837|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|0|1B|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|U|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|V|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|W|8|@]|9|@$K|X|L|Y|1|Z]]|A|$]]|$1|M|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|J]]]]

You can get OTP from your message.

<pre><code>otptextField.textContentType = .oneTimeCode
</code></pre>

Can please get the project from his link.

<a href="https://github.com/karthickkck315/Automatic-OTP" rel="nofollow noreferrer">https://github.com/karthickkck315/Automatic-OTP</a>

blocks|key|1603903|text|要在文本字段上获取otp，需要注意两件事|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1603904|1.设置您的输入字段为动态口令|offset|length|style|BOLD|1603905|其他答案让你知道如何管理你的代码来接收动态口令。|1603906|2.在消息中提供“代码”短语|1603907|您的消息必须包含英文的"code“、"passcode”、"password“，如果您想在其他语言测试中使用从"code”翻译成您的语言的某个单词来启用它|1603908|我收到了下面几个字的信息：|1603909|西班牙语：(Codingo)|1603910|德国：(Kode)|1603911|捷克语：(科德)|1603912|波斯语：(رمز)|1603913|阿拉伯语：(رمز)|1603914|otp号码必须是英语，而不是您的语言号码，您的"Code“短语必须只用一个空格与您的数字分隔，或用":”分隔而不用空格。|1603915|代码1111111|1603916|代码:111111|1603917|你必须注意的另一件重要的事情是关于消息预览。如果数字在下面有一条灰线，它将被检测为otp。如果消息显示为蓝色或没有线条，则消息不会以otp的形式通知您。像图像一样的东西|1603918|​|1603919|📷|atomic|1603920|1603921|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/b82540efa0afdff8e656dfaee43e933d.png|imageAlt^0|0|0|F|0|0|0|5|0|0|0|0|0|0|0|0|0|0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|1M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1N|8|@$D|1O|E|1P|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1R|8|@$D|1S|E|1T|F|G]]|9|@]|A|$]]|$1|L|3|M|5|6|7|1U|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1V|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1W|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1X|8|@]|9|@]|A|$]]|$1|T|3|U|5|6|7|1Y|8|@]|9|@]|A|$]]|$1|V|3|W|5|6|7|1Z|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|20|8|@]|9|@]|A|$]]|$1|Z|3|10|5|6|7|21|8|@]|9|@]|A|$]]|$1|11|3|12|5|6|7|22|8|@]|9|@]|A|$]]|$1|13|3|14|5|6|7|23|8|@]|9|@]|A|$]]|$1|15|3|16|5|6|7|24|8|@]|9|@]|A|$]]|$1|17|3|18|5|6|7|25|8|@]|9|@]|A|$]]|$1|19|3|1A|5|1B|7|26|8|@]|9|@$D|27|E|28|1|29]]|A|$]]|$1|1C|3|18|5|6|7|2A|8|@]|9|@]|A|$]]|$1|1D|3|-4|5|6|7|2B|8|@]|9|@]|A|$]]]|1E|$1F|$5|1G|1H|1I|A|$1J|1K|1L|-4]]]]

To get otp on your text field two things to be observed
1. set your input filed as otp
Other answers let you know how manage your code to receive otp.
2. provide &quot;code&quot; phrase in your message
Your message must contains &quot;code&quot;, &quot;passcode&quot;, &quot;password&quot; in english and if you want enable it in other language test with some word translated from &quot;code&quot; to your language
I have received message with bellow words:
Spanish: (Codingo)
Germany: (Kode)
Czech: (Kod)
Persian: (رمز)
Arabic: (رمز)
The otp number must be english not your language number, your &quot;Code&quot; phrase must be separate with only one space with your numbers or with &quot;:&quot; without space.
Code 1111111
Code:111111
There is one other important thing you must be attention is about message preview. The numbers will be detected as otp if it has a gray line in below. if it shows in blue color or without line, Message does not notify you as otp. Somthing like image
<a href="https://i.stack.imgur.com/IC4Qc.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/IC4Qc.png" alt="enter image description here" /></a>

blocks|key|1603881|text|支持自动填充动态口令注意:要从消息中读取动态口令，消息应包含代码或密码|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1603882|if+#available(iOS+12.0,+*)+{
++++++++++++optTextField.textContentType+=+.oneTimeCode
++++++++}+else+{
++++++++++++//+Fallback+on+earlier+versions
++++++++++++print("Fallback+on+earlier+versions")
++++++++}|code-block|syntax|javascript|1603883|entityMap^0|0|Z|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

To support Autofill OTP
Note : To read OTP from Messages, Message should contain code or passcode
<pre><code>if #available(iOS 12.0, *) {
 optTextField.textContentType = .oneTimeCode
 } else {
 // Fallback on earlier versions
 print(&quot;Fallback on earlier versions&quot;)
 }
</code></pre>

blocks|key|1966048|text|if(server.google==server.connected)}{
+++return+server;
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1966049|连接后创建一个λ(+e->+"")；!！|unstyled|offset|length|style|CODE|1966050|entityMap^0|0|8|9|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@$G|O|H|P|I|J]]|9|@]|A|$]]|$1|K|3|-4|5|F|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<pre><code>if(server.google==server.connected)}{
 return server;
}
</code></pre>

when connected make a lambda <code>( e-&gt; "")</code>;
!!

blocks|key|5494586|text|不是的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5494587|由于这将被视为隐私问题，因此您无法访问用户的SMS收件箱。|5494588|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

No.

Because this would be considered a privacy issue, you cannot access the users SMS inbox.

Is there any way to access data from iPhone inbox(SMS) to ios application to do automatic OTP verification like the one in Android? I shall be grateful for your help.

Automatic OTP verification in iOS?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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有没有办法从iPhone收件箱(短信)到ios应用程序中访问数据，像安卓那样进行自动动态口令验证？我将非常感谢你的帮助。

问iOS中的自动动态口令验证？
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