Question

单击文本框时，我使键盘向上移动，但是单击另一个文本框时，它使视图向上移动了更多。谢谢您的帮助。

func keyboardStates() {
        NotificationCenter.default.addObserver(self, selector: 
#selector(keyboardWillChange(notification:)), name: 
UIResponder.keyboardWillShowNotification, object: nil)
        NotificationCenter.default.addObserver(self, selector: 
#selector(keyboardWillChange(notification:)), name: 
UIResponder.keyboardWillHideNotification, object: nil)
}

deinit {
    NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillShowNotification, object: nil)
    NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillHideNotification, object: nil)
}


@objc func keyboardWillChange(notification: Notification){

    guard let keyboardRect = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue else {

        return
    }

    if notification.name == UIResponder.keyboardWillShowNotification {
        view.frame.origin.y = -keyboardRect.height/3
    } else {
        view.frame.origin.y = 0
    }
}

Answer 1

尝试以下方法

@objc
    func keyboardWillChange(_ notification: NSNotification) {
        guard let duration = notification.userInfo?[UIResponder.keyboardAnimationDurationUserInfoKey] as? Double else { return }
        guard let curve = notification.userInfo?[UIResponder.keyboardAnimationCurveUserInfoKey] as? UInt else { return }
        guard let startingFrame = (notification.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue else { return }
        guard let endingFrame = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue else { return }
        let deltaY = endingFrame.origin.y - startingFrame.origin.y
        UIView.animateKeyframes(withDuration: duration, delay: 0.0, options: UIView.KeyframeAnimationOptions(rawValue: curve), animations: {
            self.frame.origin.y += deltaY
        }, completion: nil)
    }

Answer 2

<!-- Start of a jumbotron -->

<div id="LoginFormJumbo" class="container">
  <div id="Jumbotronlogin" class="jumbotron">

    <!-- Form starts here  -->
    <form class="form-group mx-auto" action="#" method="POST">

        <!-- Cross Site Request Forgery Token -->
        {% csrf_token %}
        <!-- End Cross Site Request Forgery -->

        <div id="formtest" class="container">

          <label id="email_address_label">{{form.email.label_tag}}</label>
            <br>    <!-- This is an example of how to layout your input & label -->
          {{form.email}} <!-- This is calling the input -->

            <br> </br>

          <label id="password_label">{{form.password.label_tag}}</label>
            <br>    <-- Another example here -->
            {{form.password}} <!-- Calling another input in our form -->
            <br>
            <a id="forgot_pass" href="#"> <small>Forgot password?</small></a>

            <br> <br> </br>

          <input id="login_submit_btn" type="submit" name="" value="Enter">

         </div>

        {% for i in form %}
        <div class="fieldWrapper">

          {{i.errors}}
          {% if i.help_text %}
          <p class="help">{{i.help_text|safe}}</p>
          {% endif %}
          {% endfor %}
        </div>


    </form>
    <!-- Form ends here -->

    </div>
  </div>
</div>
<!-- End Jumbotron  -->

Answer 3

在每个视图控制器的基础上做到这一点将是困难且耗时的，我建议将这个出色的库用于此类任务，它支持滚动视图，表视图和集合视图。

https://github.com/hackiftekhar/IQKeyboardManager

尝试一下，我保证您也会喜欢它。

关于， ish

在显示视图时如何防止键盘向上移动视图

3 个答案: