ios – 当键盘存在时如何使UITextField向上移动？

概述如何防止键盘隐藏UITextField？ 我假设这是在UIViewController上发生的.如果是这样,您可以设置在键盘显示/隐藏时调用以下2个函数,并在其块中进行适当响应. 设置UIViewController： class XXXViewController: UIViewController, UITextFieldDelegate... { var frameView: UI 如何防止键盘隐藏UITextFIEld？解决方法 我假设这是在UIVIEwController上发生的.如果是这样,您可以设置在键盘显示/隐藏时调用以下2个函数,并在其块中进行适当响应.

设置UIVIEwController：

class XXXVIEwController: UIVIEwController,UITextFIEldDelegate... {    var frameVIEw: UIVIEw!

首先,在VIEwDIDLoad中：

overrIDe func vIEwDIDLoad() {    self.frameVIEw = UIVIEw(frame: CGRectMake(0,self.vIEw.bounds.wIDth,self.vIEw.bounds.height))    // Keyboard stuff.    let center: NSNotificationCenter = NSNotificationCenter.defaultCenter()        center.addobserver(self,selector: #selector(ATReportContentVIEwController.keyboarDWillShow(_:)),name: UIKeyboarDWillShowNotification,object: nil)    center.addobserver(self,selector: #selector(ATReportContentVIEwController.keyboarDWillHIDe(_:)),name: UIKeyboarDWillHIDeNotification,object: nil)}

然后实现以下2个函数以响应上面VIEwDIDLoad中定义的NSNotificationCenter函数.我给你一个移动整个视图的例子,但你也可以只为UITextFIElds制作动画.

func keyboarDWillShow(notification: NSNotification) {    let info:NSDictionary = notification.userInfo!    let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).CGRectValue()    let keyboardHeight: CGfloat = keyboardSize.height    let _: CGfloat = info[UIKeyboardAnimationDurationUserInfoKey] as! NSNumber as CGfloat    UIVIEw.animateWithDuration(0.25,delay: 0.25,options: UIVIEwAnimationoptions.CurveEaseInOut,animations: {        self.frameVIEw.frame = CGRectMake(0,(self.frameVIEw.frame.origin.y - keyboardHeight),self.vIEw.bounds.height)        },completion: nil)}func keyboarDWillHIDe(notification: NSNotification) {    let info: NSDictionary = notification.userInfo!    let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).CGRectValue()    let keyboardHeight: CGfloat = keyboardSize.height    let _: CGfloat = info[UIKeyboardAnimationDurationUserInfoKey] as! NSNumber as CGfloat    UIVIEw.animateWithDuration(0.25,(self.frameVIEw.frame.origin.y + keyboardHeight),completion: nil)}

不要忘记在离开视图时删除通知

overrIDe func vIEwWilldisappear(animated: Bool) {    NSNotificationCenter.defaultCenter().removeObserver(self,object: nil)    NSNotificationCenter.defaultCenter().removeObserver(self,object: nil)}

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