iOS 切换键盘

1.点击toolbar的加号按钮切换键盘

　　　　　　　切换前　　　　　　　　　　　　　　　切换后

2 要实现上述效果

2.1 需要监听键盘的弹出隐藏

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

 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 }

2.2 toolbar的懒加载方法

 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 }

2.3 实现changeKeybord方法

 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inputView
10     }
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 }

2.4 自定义一个新键盘

未完待续