APP開發(fā)之IOSSWIFT如何隱藏鍵盤-IOS隱藏鍵盤全解

如果你是剛從網(wǎng)站建設(shè)行業(yè)轉(zhuǎn)到APP開發(fā)，那么你會(huì)覺得不可思議，隱藏鍵盤這么簡(jiǎn)單的事情，還要這樣大費(fèi)周張。先不牢騷了，以上是創(chuàng)新互聯(lián)的解決經(jīng)驗(yàn)：
正常情況下，只要觸摸焦點(diǎn)放在輸入框如textField\textView上，自動(dòng)會(huì)彈出鍵盤，所以，隱藏鍵盤的最終方法就是讓控件失去焦點(diǎn)。textField.resignFirstResponder()
textView.resignFirstResponder()
用例一、TextField按Enter鍵隱藏實(shí)現(xiàn)委托UITextFieldDelegate 方法
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}用例二、點(diǎn)擊其他任意地方隱藏override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
self.textField.resignFirstResponder()
self.textView.resignFirstResponder()
}
用例三、點(diǎn)擊手勢(shì)隱藏let tapGesture:UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "hideKeyboard:")
self.view.addGestureRecognizer(tapGesture)
func hideKeyboard(sender: UITapGestureRecognizer) {
self.SearchBar1.resignFirstResponder()
}
用例四、滾動(dòng)tableView隱藏func scrollViewDidScroll(scrollView: UIScrollView) {
self.SearchBar1.resignFirstResponder()
}

用例五、通過鍵盤通知事件在其上方添加按鈕
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
//添加鍵盤彈出通知
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardDidShow:"), name: UIKeyboardDidShowNotification, object: nil)
//添加鍵盤收起同志
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name: UIKeyboardWillHideNotification, object: nil)
}
override func viewDidDisappear(animated: Bool) {
//取消通知
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardDidShowNotification, object: nil)
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: nil)
}
func keyboardDidShow(notification:NSNotification) {
let keyBoardBounds = (notification.userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue()
let deltaY = keyBoardBounds.size.height
let frame_height = self.view.frame.size.height
let butheight = frame_height - deltaY - 40
let width = self.view.frame.size.width
let cancalButton = UIButton(frame: CGRectMake(0,butheight,width/2,40))
cancalButton.setTitle("取消", forState:UIControlState.Normal)
cancalButton.setTitleColor(UIColor.grayColor(), forState: UIControlState.Normal)
cancalButton.backgroundColor = UIColor(red: 238/255, green: 238/255, blue: 238/255, alpha: 1)
cancalButton.addTarget(self, action: "hideKeyboard", forControlEvents: UIControlEvents.TouchUpInside)
cancalButton.tag = 9999991
self.view.addSubview(cancalButton)
let completEditButton = UIButton(frame: CGRectMake(width/2,butheight,width/2,40))
completEditButton.setTitle("完成", forState:UIControlState.Normal)
completEditButton.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Normal)
completEditButton.backgroundColor = UIColor.darkGrayColor()
completEditButton.addTarget(self, action: "completeKeyboard", forControlEvents: UIControlEvents.TouchUpInside)
completEditButton.tag = 9999992
self.view.addSubview(completEditButton)
}
func keyboardWillHide(notification:NSNotification) {
if self.view.viewWithTag(9999991) != nil {
let btnCancal = self.view.viewWithTag(9999991) as! UIButton
let btnComplete = self.view.viewWithTag(9999992) as! UIButton
btnCancal.removeFromSuperview()
btnComplete.removeFromSuperview()
}

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