{"id":185190,"date":"2023-06-26T21:06:25","date_gmt":"2023-06-26T13:06:25","guid":{"rendered":"http:\/\/www.idc.net\/help\/185190\/"},"modified":"2023-06-26T21:06:25","modified_gmt":"2023-06-26T13:06:25","slug":"%e5%90%8e%e6%b5%aa%e4%ba%91%e5%b0%8f%e7%a8%8b%e5%ba%8f%e6%95%99%e7%a8%8b%ef%bc%9a%e5%9c%a8%e5%be%ae%e4%bf%a1%e5%b0%8f%e7%a8%8b%e5%ba%8f%e7%bb%98%e5%9b%beapi%e4%b8%ad%e5%88%9b%e5%bb%ba%e4%ba%8c","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/185190\/","title":{"rendered":"\u540e\u6d6a\u4e91\u5c0f\u7a0b\u5e8f\u6559\u7a0b\uff1a\u5728\u5fae\u4fe1\u5c0f\u7a0b\u5e8f\u7ed8\u56feAPI\u4e2d\u521b\u5efa\u4e8c\u6b21\u65b9\u8d1d\u585e\u5c14\u66f2\u7ebf"},"content":{"rendered":"<p>\u7ed8\u56fe\u63a5\u53e3\u548c\u65b9\u6cd5<\/p>\n<h2>canvasContext.quadraticCurveTo<\/h2>\n<hr>\n<h3>\u5b9a\u4e49<\/h3>\n<p>\u521b\u5efa\u4e8c\u6b21\u8d1d\u585e\u5c14\u66f2\u7ebf\u8def\u5f84\u3002<\/p>\n<p><strong>Tip<\/strong>: \u66f2\u7ebf\u7684\u8d77\u59cb\u70b9\u4e3a\u8def\u5f84\u4e2d\u524d\u4e00\u4e2a\u70b9\u3002<\/p>\n<h3>\u53c2\u6570<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u53c2\u6570<\/th>\n<th>\u7c7b\u578b<\/th>\n<th>\u8bf4\u660e<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>cpx<\/td>\n<td>Number<\/td>\n<td>\u8d1d\u585e\u5c14\u63a7\u5236\u70b9\u7684x\u5750\u6807<\/td>\n<\/tr>\n<tr>\n<td>cpy<\/td>\n<td>Number<\/td>\n<td>\u8d1d\u585e\u5c14\u63a7\u5236\u70b9\u7684y\u5750\u6807<\/td>\n<\/tr>\n<tr>\n<td>x<\/td>\n<td>Number<\/td>\n<td>\u7ed3\u675f\u70b9\u7684x\u5750\u6807<\/td>\n<\/tr>\n<tr>\n<td>y<\/td>\n<td>Number<\/td>\n<td>\u7ed3\u675f\u70b9\u7684y\u5750\u6807<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u4f8b\u5b50<\/h3>\n<pre><code>const ctx = wx.createCanvasContext('myCanvas')\n\n\/\/ Draw points\nctx.beginPath()\nctx.arc(20, 20, 2, 0, 2 * Math.PI)\nctx.setFillStyle('red')\nctx.fill()\n\nctx.beginPath()\nctx.arc(200, 20, 2, 0, 2 * Math.PI)\nctx.setFillStyle('lightgreen')\nctx.fill()\n\nctx.beginPath()\nctx.arc(20, 100, 2, 0, 2 * Math.PI)\nctx.setFillStyle('blue')\nctx.fill()\n\nctx.setFillStyle('black')\nctx.setFontSize(12)\n\n\/\/ Draw guides\nctx.beginPath()\nctx.moveTo(20, 20)\nctx.lineTo(20, 100)\nctx.lineTo(200, 20)\nctx.setStrokeStyle('#AAAAAA')\nctx.stroke()\n\n\/\/ Draw quadratic curve\nctx.beginPath()\nctx.moveTo(20, 20)\nctx.quadraticCurveTo(20, 100, 200, 20)\nctx.setStrokeStyle('black')\nctx.stroke()\n\nctx.draw()\n<\/code><\/pre>\n<p><\/p>\n<p>\u9488\u5bf9 <code>moveTo(20, 20)<\/code> <code>quadraticCurveTo(20, 100, 200, 20)<\/code>\u7684\u4e09\u4e2a\u5173\u952e\u5750\u6807\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u7ea2\u8272\uff1a\u8d77\u59cb\u70b9(20, 20)<\/li>\n<li>\u84dd\u8272\uff1a\u63a7\u5236\u70b9(20, 100)<\/li>\n<li>\u7eff\u8272\uff1a\u7ec8\u6b62\u70b9(200, 20)<\/li>\n<\/ul>\n<p>\u7ed8\u56fe\u63a5\u53e3\u548c\u65b9\u6cd5<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed8\u56fe\u63a5\u53e3\u548c\u65b9\u6cd5 canvasContext.quadraticCurveTo \u5b9a\u4e49 \u521b\u5efa\u4e8c\u6b21\u8d1d\u585e\u5c14\u66f2\u7ebf\u8def\u5f84\u3002  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":185191,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[182398],"tags":[],"class_list":["post-185190","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mini-program"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/185190","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=185190"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/185190\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media\/185191"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=185190"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=185190"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=185190"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}