将Unicode笑脸转换为nsstring ios

Question

我正在开发聊天应用。我想添加笑脸支持。我可以使用像\ue415之类的unicode在iOS中直接显示笑脸:-)。当我使用此unicode字符串发送消息时，其他方面正在接收像这样的方框。如何将unicode字符转换为nsstring。

我在集合视图中使用情感如bellow

代码：

data = [NSArray arrayWithObjects:@"\ue415",@"\ue056",@"\ue057",@"\ue414",@"\ue405",@"\ue106",@"\ue418",@"\ue417",@"\ue40d",@"\ue40a",@"\ue404",@"\ue105",@"\ue409",@"\ue40e",@"\ue402",@"\ue108",@"\ue403",@"\ue058",@"\ue407",@"\ue401",@"\ue40f",@"\ue40b",@"\ue406",@"\ue413",@"\ue411",@"\ue412",@"\ue410",@"\ue107",@"\ue059",@"\ue416",@"\ue408",@"\ue40c",@"\ue11a",@"\ue10c",@"\ue32c",@"\ue32a",@"\ue32d",@"\ue328",@"\ue32b",@"\ue022",@"\ue023",nil];

CollectionView委派方法

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{

    static NSString *CellIdentifier = @"EmojiCell";

    UICollectionViewCell *cell =[collectionView dequeueReusableCellWithReuseIdentifier:CellIdentifier forIndexPath:indexPath];
    cell.backgroundColor = [UIColor grayColor];

    UILabel *lable = (UILabel *)[cell viewWithTag:100];

    lable.text = [data objectAtIndex:indexPath.row];

    return cell;
}

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{

    messageField.text = [NSString stringWithFormat:@"%@%@",messageField.text,[data objectAtIndex:indexPath.row]];
}

发送消息的代码

NSString *messageStr = self.messageField.text ;

    if([messageStr length] > 0) {

        NSXMLElement *body = [NSXMLElement elementWithName:@"body"];
        [body setStringValue: messageStr];

        XMPPJID *jid = [XMPPJID jidWithString:chatWithUser];

        NSXMLElement *message = [NSXMLElement elementWithName:@"message"];
        [message addAttributeWithName:@"type" stringValue:@"chat"];
        [message addAttributeWithName:@"to" stringValue:[jid full]];
        [message addChild:body];

        [self.xmppStream sendElement:message];
    }

Answer 1

只需更改symbolCode。

unichar symbolCode = 0xf086;
NSString *chatIcon =[NSString stringWithCharacters:&symbolCode length:1];

为您编辑：

unichar symbolCode = 0xE415;
NSString *smile =[NSString stringWithCharacters:&symbolCode length:1];
NSLog(@"%@",smile);
UILabel *lab = [[UILabel alloc] initWithFrame:CGRectMake(10, 20, 100, 50)];
lab.text = smile;
[self.view addSubview:lab];