效果圖：

鍵盤.gif

前言：要做成上面的效果圖，需要我們自定義鍵盤。但是上面的鍵盤一個(gè)view 就可以搞定，可是下面的表情或者擴(kuò)展怎么處理呢，有人說用UITextview的inputView 處理，可是在使用inpuview的時(shí)候，處理表情鍵盤或者擴(kuò)展鍵盤，UITextview會(huì)一直成為響應(yīng)者，光標(biāo)會(huì)一直存在，所以我們把輔助鍵盤放在 下面。

如圖：

說明.png

大概思路就是 點(diǎn)擊鍵盤上UITextview的時(shí)候，讓UITextview成為第一響應(yīng)者，點(diǎn)擊語音按鈕，表情按鈕，more 按鈕，讓UITextview取消第一響應(yīng)者，然后把輔助鍵盤視圖放置在鍵盤的下方。

1、 首先，我們自定義一個(gè)view，ChatBox。設(shè)置幾種 鍵盤狀態(tài)

typedef NS_ENUM(NSInteger, LXChatBoxStatus) {
    LXChatBoxStatusNothing,     // 默認(rèn)狀態(tài)
    LXChatBoxStatusShowVoLXe,   // 錄音狀態(tài)
    LXChatBoxStatusShowFace,    // 輸入表情狀態(tài)
    LXChatBoxStatusShowMore,    // 顯示“更多”頁面狀態(tài)
    LXChatBoxStatusShowKeyboard,// 正常鍵盤
    LXChatBoxStatusShowVideo    // 錄制視頻
};

@property(nonatomic,assign)LXChatBoxStatus status;

在點(diǎn)擊按鈕或者 編輯UITextview的時(shí)候設(shè)置狀態(tài)：

#pragma mark---textview--代理方法---
-(void)textViewDidBeginEditing:(UITextView *)textView{
    if (self.status != LXChatBoxStatusShowKeyboard) {
        self.status = LXChatBoxStatusShowKeyboard;

    }
        [self changeFrame:ceilf([textView sizeThatFits:textView.frame.size].height)];
}

#pragma mark---Event Responds---

-(void)voiceButtonDown:(UIButton *)button{
    
    button.selected = !button.selected;
    if (button.selected) {
        self.status = LXChatBoxStatusShowKeyboard;
    }else{
        self.status = LXChatBoxStatusShowVoLXe;
    }
    
}
-(void)faceButtonDown:(UIButton *)button{
    button.selected = !button.selected;
    if (button.selected) {
        self.status = LXChatBoxStatusShowFace;
    }else{
        self.status = LXChatBoxStatusShowKeyboard;
    }
   
    
}
-(void)moreButtonDown:(UIButton *)button{
    button.selected = !button.selected;
    if (button.selected) {
        self.status = LXChatBoxStatusShowMore;
    }else{
        self.status = LXChatBoxStatusShowKeyboard;
    }
}

通過設(shè)置鍵盤狀態(tài)，在設(shè)置狀態(tài)里對(duì)鍵盤視圖的隱藏做一些處理。調(diào)整高度

-(void)setStatus:(LXChatBoxStatus)status{
    if (_status == status) {
        return;
    }
    _status = status;
    switch (_status) {
        case LXChatBoxStatusNothing:
        {
            self.voiceButton.selected = YES;
            self.faceView.hidden = self.moreView.hidden = YES;
            [self.textView resignFirstResponder];
            [UIView animateWithDuration:0.3 animations:^{
                self.frame = CGRectMake(0, KScreenH - self.textView.height - 2 *BOXTEXTViewSPACE, KScreenW, self.textView.height + 2 *BOXTEXTViewSPACE);

            }];
        }
            
           
            break;
        case LXChatBoxStatusShowKeyboard:
        {
            self.faceView.hidden = self.moreView.hidden = YES;

            self.voiceButton.selected = YES;
            self.textView.hidden = NO;
            self.talkButton.hidden = YES;
            self.faceButton.selected= NO;
            
            [UIView animateWithDuration:0.3 animations:^{
                self.frame = CGRectMake(0, self.y, KScreenW, self.textView.height + 2 *BOXTEXTViewSPACE);
                
            }];
             [self.textView becomeFirstResponder];
        }
        break;
        case LXChatBoxStatusShowVoLXe:
        {
            self.faceView.hidden = self.moreView.hidden = YES;

            [self.textView resignFirstResponder];
            self.voiceButton.selected = NO;
            self.talkButton.hidden = NO;
            self.textView.hidden = YES;
            [UIView animateWithDuration:0.3 animations:^{
                [self voiceResetFrame];
            }];

        }
            
            break;
        case LXChatBoxStatusShowFace:
        {
            if (self.textView.isFirstResponder) {
                [self.textView resignFirstResponder];
            }
            

            self.voiceButton.selected = YES;
            self.moreView.hidden = YES;
            self.faceView.hidden = NO;
            
            self.height = self.textView.height+2 *BOXTEXTViewSPACE + BOXOTHERH;
            self.y = KScreenH - self.height;
            self.bottomCotainer.y = self.textView.height + 2 *BOXTEXTViewSPACE;

        }
            
            break;
        case LXChatBoxStatusShowMore:
        {
            

            if (self.textView.isFirstResponder) {
                [self.textView resignFirstResponder];
            }
            
            self.voiceButton.selected = YES;
            self.moreView.hidden = NO;
            self.faceView.hidden = YES;

            self.height = self.textView.height+2 *BOXTEXTViewSPACE + BOXOTHERH;
            self.y = KScreenH - self.height;
            self.bottomCotainer.y = self.textView.height + 2 *BOXTEXTViewSPACE;
        }
        default:
            break;
    }
    if ([self.delegate respondsToSelector:@selector(changeStatusChat:)]) {
        [self.delegate changeStatusChat:self.y];
    }
}

2、但是，只是在狀態(tài)里設(shè)置鍵盤高度是不夠的，如果我們點(diǎn)擊UITextview，執(zhí)行順序是這樣的：

（1） -(void)keyboardWillChangeFrame:(NSNotification *)notification
（2） -(void)textViewDidBeginEditing:(UITextView *)textView

所以說，如果沒有點(diǎn)擊其他按鈕（聲音，表情，更多），點(diǎn)擊了UITextview，在-(void)textViewDidBeginEditing:(UITextView *)textView設(shè)置鍵盤狀態(tài)是沒有用的，所以要鍵盤通知里做處理

-(void)keyboardWillChangeFrame:(NSNotification *)notification{
    
   
    //因?yàn)樵?切換視圖的時(shí)候，點(diǎn)擊了表情按鈕，或者更多按鈕，輸入框是，鍵盤彈出在textViewDidBeginEditing 這個(gè)方法調(diào)用之前就會(huì)調(diào)用，
//        self.height = self.textView.height + 2 *BOXTEXTViewSPACE;
    if (self.status == LXChatBoxStatusShowMore ||self.status == LXChatBoxStatusShowFace) {
        return;
    }

3、 針對(duì)鍵盤高度改變?cè)O(shè)置代理接口

@property(nonatomic,weak)id<LXChatBoxDelegate>delegate;

在鍵盤高度改變的地方設(shè)置代理（鍵盤狀態(tài)改變得地方），（鍵盤Textview文字 改變的地方）（鍵盤通知），

 if ([self.delegate respondsToSelector:@selector(changeStatusChat:)]) {
        [self.delegate changeStatusChat:self.y];
    }

關(guān)于 接口：@property(nonatomic,assign)BOOL isDisappear;//為了在側(cè)滑返回的時(shí)候自定義鍵盤與 鍵盤一體，可以參考文章：一體鍵盤
demo 地址：仿微信鍵盤