DJComposeViewController.m

#pragma mark - 切换键盘- (void)switchKeyboard {        // textView.inputView 代表的就是键盘    if (self.textView.inputView) { // 默认self.textView.inputView = nil, 为nil则代表默认为系统键盘        self.textView.inputView = nil;    } else {        DJEmotionKeyboard *emotionKeyboard = [[DJEmotionKeyboard alloc] init];        emotionKeyboard.width = self.view.width;        emotionKeyboard.height = 216; // IOS 系统键盘高度一般都是216        self.textView.inputView = emotionKeyboard;    }     // 先调用endEditing,再调用becomeFirstResponder才可造成键盘效果    [self.textView endEditing:YES];    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{        [self.textView becomeFirstResponder];    });    }

最终效果：