http://www.cocoachina.com/ios/20180416/23033.html 2018-04-16 15:34 编辑: yyuuzhu 分类:iOS开发 来源:程序鹅 8 3008 iOS Work Hard, Play Hard, Live Life. 前言 生活中,我们都是使用支付宝支付,当我们再扫描一个较远的二维码过程中,我们会发现,镜头会自动放大很容易扫到二维码进行支付.看起来这么人性化的操作,又是什么原理,该怎么实现呢?扫码现在很常见, 很多App基本都具备扫
Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties: Integers in each row are sorted from left to right. The first integer of each row is greater than the last integer of the previous ro
生成二维码,需要依赖jquery,先引入一个jquery,然后需要一个插件改变过了jquery-qrcode.js 插件代码(需要的自己打开看): /*! jquery-qrcode v0.14.0 - https://larsjung.de/jquery-qrcode/ */ (function (vendor_qrcode) { 'use strict'; var jq = window.jQuery; // Check if canvas is available in the brows