关于NSlog打印16进制字符串无法输出问题可参考如下

剽窃自公司某大牛丰哥：😆😆

NSString *hexStr = @"\x11";

NSString *bodyStr = @"body"

const char* pHeader = [hexStr UTF8String];

NSLog(@"SendData Head:0X%02X Body:%@", pHeader[0], bodyStr);