生成二维码必备，使用简单。直接保存成QPixmap。 struct zint_symbol* my_symbol = ZBarcode_Create(); my_symbol->symbology = BARCODE_QRCODE; my_symbol->scale = 2; my_symbol->show_hrt = 0; ZBarcode_Encode_and_Buffer(my_symbol, (unsigned char *)m_keyString.toUtf8().d