我使用此代码在键盘出现时向上移动视图,在我的登录页面中,此代码运行良好,但在注册页面中它不起作用。
func textFieldDidBeginEditing(textField: UITextField) {
animateViewMoving(true, moveValue: 100)
}
func textFieldDidEndEditing(textField: UITextField) {
animateViewMoving(false, moveValue: 100)
}
func animateViewMoving (up:Bool, moveValue :CGFloat){
var movementDuration:NSTimeInterval = 0.3
var movement:CGFloat = ( up ? -moveValue : moveValue)
UIView.beginAnimations( "animateView", context: nil)
UIView.setAnimationBeginsFromCurrentState(true)
UIView.setAnimationDuration(movementDuration )
self.view.frame = CGRectOffset(self.view.frame, 0, movement)
UIView.commitAnimations()
}
我还有另一个功能可以在键盘上返回键,它也可以在登录页面上工作,但不能在注册页面上工作。两页之间的所有内容都相同。
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
答案 0 :(得分:4)
您是否已在ViewController类中分配了UITextField的委托? 如果没有把它设置为自我。
self.youttextfield.delegate = self
答案 1 :(得分:0)
演示链接:https://github.com/harshilkotecha/UIScrollViewWhenKeyboardAppearInSwift3
当你有多个textview时,它是如此困难,所以最好的解决方案 - >
第1步:添加UITextFieldDelegate
class ScrollViewController: UIViewController,UITextFieldDelegate {
第2步:创建新的IBOutlet,但不要连接任何文本字段
// get current text box when user Begin editing
@IBOutlet weak var activeTextField: UITextField?
步骤3:当用户关注文本字段对象传递引用并存储在activeTextField中时,编写这两个方法
// get current text field
func textFieldDidBeginEditing(_ textField: UITextField)
{
activeTextField=textField;
}
func textFieldDidEndEditing(_ textField: UITextField)
{
activeTextField=nil;
}
步骤5:在viewdidload setNotificationKeyboard中设置通知
override func viewWillAppear(_ animated: Bool) {
// call method for keyboard notification
self.setNotificationKeyboard()
}
// Notification when keyboard show
func setNotificationKeyboard () {
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWasShown(notification:)), name: .UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillBeHidden(notification:)), name: .UIKeyboardWillHide, object: nil)
}
第6步:隐藏和取消隐藏的两种方法
func keyboardWasShown(notification: NSNotification)
{
var info = notification.userInfo!
let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue.size
let contentInsets : UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, keyboardSize!.height+10, 0.0)
self.scrollView.contentInset = contentInsets
self.scrollView.scrollIndicatorInsets = contentInsets
var aRect : CGRect = self.view.frame
aRect.size.height -= keyboardSize!.height
if let activeField = self.activeTextField
{
if (!aRect.contains(activeField.frame.origin))
{
self.scrollView.scrollRectToVisible(activeField.frame, animated: true)
}
}
}
// when keyboard hide reduce height of scroll view
func keyboardWillBeHidden(notification: NSNotification){
let contentInsets : UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0,0.0, 0.0)
self.scrollView.contentInset = contentInsets
self.scrollView.scrollIndicatorInsets = contentInsets
self.view.endEditing(true)
}