DJComposePageView.m

- (void)deleteInputEmotion {    // 发通知    [[NSNotificationCenter defaultCenter] postNotificationName:DJEmotionDidDeletedNotification object:nil];    }

DJComposeViewController.m

// 注册监听删除表情通知    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(onReceiveEmotionDidDeletedNotification) name:DJEmotionDidDeletedNotification object:nil];

/** 接收到删除表情通知 */- (void)onReceiveEmotionDidDeletedNotification {    [self.textView deleteBackward];}

最终效果：