一、ios键盘自适应弹出效果图

二、工程图

三、代码

viewcontroller.h

? 1 2 3 4 5 6 7 #import <uikit/uikit.h> @interface viewcontroller : uiviewcontroller <uitextfielddelegate> @end

viewcontroller.m

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 #import "viewcontroller.h" @interface viewcontroller () @end @implementation viewcontroller - (void)viewdidload { [super viewdidload]; // do any additional setup after loading the view, typically from a nib. uitextfield *field=[[uitextfield alloc]initwithframe:cgrectmake(100, 300, 50, 50)]; field.backgroundcolor=[uicolor redcolor]; field.delegate=self; [self.view addsubview:field]; [[nsnotificationcenter defaultcenter] addobserver:self selector:@selector(keyboardwillshow:) name:uikeyboardwillshownotification object:nil]; [[nsnotificationcenter defaultcenter] addobserver:self selector:@selector(keyboardwillhide:) name:uikeyboardwillhidenotification object:nil]; } #pragma -mark -keyboard notificatin - (void)keyboardwillshow:(nsnotification *)notification { nsdictionary *info = [notification userinfo]; // keyboardheight 为键盘高度 cgsize keyboardsize = [[info objectforkey:uikeyboardframeenduserinfokey] cgrectvalue].size; [self animateviewwithkeyboardheight:keyboardsize.height]; } - (void)keyboardwillhide:(nsnotification *)notification { [self animateviewwithkeyboardheight:0.0]; } - (void)animateviewwithkeyboardheight:(cgfloat)keyboardheight { nstimeinterval animationduration = 0.3f; cgfloat height = self.view.bounds.size.height; cgfloat width = self.view.bounds.size.width; cgfloat topsize = 0.0; cgfloat viewh = self.view.frame.size.height-64; cgfloat deviceheight = [uiscreen mainscreen].bounds.size.height; cgfloat animateh = deviceheight - viewh - keyboardheight; if (animateh >= 0) { topsize = 0; cgrect torect = cgrectmake(0, topsize, width, height); self.view.frame = torect; } else { topsize = animateh; cgrect torect = cgrectmake(0, topsize, width, height); [uiview animatewithduration:animationduration animations:^{ self.view.frame = torect; }]; } } #pragma -mark -uitextfielddelegate -(bool)textfieldshouldreturn:(uitextfield *)textfield { [textfield resignfirstresponder]; return yes; } - (void)didreceivememorywarning { [super didreceivememorywarning]; // dispose of any resources that can be recreated. } @end

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