UIWebView HTML5 Canvas 和 Retina 显示屏
javascriptweb developmentfront end scripts
要将 Retina 大小的图像放入 HTML5 Canvas，请尝试使用 Canvas 执行以下代码:
var context = myCanvas.getContext("2d");
context.attr("width", width * window.devicePixelRatio);
context.attr("height", height * window.devicePixelRatio);
context.scale(window.devicePixelRatio, window.devicePixelRatio);
context.drawImage(img, x, y, width, height);
