swift 打印emoji表情

code为16进制编码

            //1.创建扫描器
            let scanner = Scanner(string: code)
            
            //2.调用方法，扫描出code中的值
            var value : UInt32 = 0
            scanner.scanHexInt32(&value)
            
            //3.将value转成字符
            let c = Character(UnicodeScalar(value)!)
            
            //4.将字符转成字符串
            emojiCode = String(c)