Label 添加表情图片

    // 添加表情

    NSTextAttachment *attch = [[NSTextAttachment alloc] init];

    // 表情图片

    attch.image = [UIImage imageNamed:@"d_aini"];

    // 设置图片大小

    attch.bounds = CGRectMake(0, 0, 32, 32);

    

    // 创建带有图片的富文本

    NSAttributedString *string = [NSAttributedString attributedStringWithAttachment:attch];

    [contentStr appendAttributedString:string];

    contentLabel.attributedText = contentStr;