1 /** 2  *  键盘即将隐藏 3  */ 4 - (void)keyboardWillHide:(NSNotification *)note 5 { 6     // 1.键盘弹出需要的时间 7     CGFloat duration = [note.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue]; 8     // 2.动画 9     [UIView animateWithDuration:duration animations:^{10         self.toolbar.transform = CGAffineTransformIdentity;11     }];12 }

 1 /** 2  *  键盘即将弹出 3  */ 4 - (void)keyboardWillShow:(NSNotification *)note 5 { 6     // 1.键盘弹出需要的时间 7     CGFloat duration = [note.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue]; 8     // 2.动画 9     [UIView animateWithDuration:duration animations:^{10         // 取出键盘高度11         CGRect keyboardF = [note.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];12         CGFloat keyboardH = keyboardF.size.height;13         self.toolbar.transform = CGAffineTransformMakeTranslation(0, - keyboardH);14     }];15 }

 1 - (UIToolbar *)toolbar{ 2     if (_toolbar == nil) { 3         _toolbar = [[UIToolbar alloc]init]; 4         _toolbar.frame = CGRectMake(0, screenHeight - kToolbarHeight , screenWidth, kToolbarHeight); 5         [self.view addSubview:_toolbar]; 6          7         // 切换键盘的按钮 8         UIButton *changeKeybord = [UIButton buttonWithType:UIButtonTypeContactAdd]; 9         [_toolbar addSubview:changeKeybord];10 11         [changeKeybord addTarget:self action:@selector(changeKeybord) forControlEvents:UIControlEventTouchDown];12     }13     return _toolbar;14 }

 1 - (void)changeKeybord 2 { 3     if (self.mytext.inputView) { //inputView存在则说明是自定义键盘 4         self.mytext.inputView = nil; //把自定义键盘清空,则就变回系统键盘 5     }else{ //反之,inputView不存在,则说明当前显示的是系统键盘 6         UIView *newKeybord = [[UIView alloc]init];  // 实例化一个新键盘 7         newKeybord.bounds = CGRectMake(0, 0, 320, 216); 8         newKeybord.backgroundColor = [UIColor yellowColor]; 9         self.mytext.inputView = newKeybord; //将新键盘赋值给inputView10     }11 12     // 下面这句不能省,因为切换键盘后,只有先隐藏再弹出,才会调出新键盘13     [self.mytext resignFirstResponder];14     // 为了让键盘切换交互效果更顺畅,增加延迟,如果不增加延迟,会出现:旧键盘还没完全隐藏,新键盘就已经弹出了15     dispatch_after((uint64_t)3.0, dispatch_get_main_queue(), ^{16         [self.mytext becomeFirstResponder];17     });18     19 }