What is a QR code?
A QR code (an initialism for Quick Response code), is a type of matrix barcode. A QR code consists of black squares arranged in a square grid on a white background, which can be read by an imaging device such as a camera.
© 版权声明
文章版权归作者所有，未经允许请勿转载。
相关文章
暂无评论...