APP开发之IOSSWIFT如何隐藏键盘-IOS隐藏键盘全解

正常情况下，只要触摸焦点放在输入框如textfield\textview上，自动会弹出键盘，所以，隐藏键盘的最终方法就是让控件失去焦点。textfield.resignfirstresponder()
textview.resignfirstresponder()
用例一、textfield按enter键隐藏实现委托uitextfielddelegate 方法
func textfieldshouldreturn(textfield: uitextfield) -> bool {
textfield.resignfirstresponder()
return true
}用例二、点击其他任意地方隐藏override func touchesbegan(touches: set<uitouch>, withevent event: uievent?) {
self.textfield.resignfirstresponder()
self.textview.resignfirstresponder()
}
用例三、点击手势隐藏let tapgesture:uitapgesturerecognizer = uitapgesturerecognizer(target: self, action: "hidekeyboard:")
self.view.addgesturerecognizer(tapgesture)
func hidekeyboard(sender: uitapgesturerecognizer) {
self.searchbar1.resignfirstresponder()
}
用例四、滚动tableview隐藏func scrollviewdidscroll(scrollview: uiscrollview) {
self.searchbar1.resignfirstresponder()
}
用例五、通过键盘通知事件在其上方添加按钮
override func viewwillappear(animated: bool) {
super.viewwillappear(animated)
//添加键盘弹出通知
nsnotificationcenter.defaultcenter().addobserver(self, selector: selector("keyboarddidshow:"), name: uikeyboarddidshownotification, object: nil)
//添加键盘收起同志
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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