{"id":6326,"date":"2017-08-04T23:59:48","date_gmt":"2017-08-04T15:59:48","guid":{"rendered":"http:\/\/www.zhangxinxu.com\/wordpress\/?p=6326"},"modified":"2020-06-18T14:51:21","modified_gmt":"2020-06-18T06:51:21","slug":"svg-foreignobject","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2017\/08\/svg-foreignobject\/","title":{"rendered":"SVG <foreignObject>\u7b80\u4ecb\u4e0e\u622a\u56fe\u7b49\u5e94\u7528"},"content":{"rendered":"

by zhangxinxu<\/a> from https:\/\/www.zhangxinxu.com\/wordpress\/?p=6326<\/a>
\n\u672c\u6587\u53ef\u5168\u6587\u8f6c\u8f7d\uff0c\u4f46\u9700\u5f97\u5230\u539f\u4f5c\u8005\u4e66\u9762\u8bb8\u53ef\uff0c\u540c\u65f6\u4fdd\u7559\u539f\u4f5c\u8005\u548c\u51fa\u5904\uff0c\u6458\u8981\u5f15\u6d41\u5219\u968f\u610f\u3002<\/p>\n

\u4e00\u3001\u4eceSVG\u6587\u672c\u6362\u884c\u8bf4\u8d77<\/h3>\n

SVG\u548cCSS\u51e0\u4e4e\u53ef\u4ee5\u770b\u6210\u662f\u540c\u4e00\u4e2a\u5e74\u4ee3\u51fa\u6765\u7684\u4e1c\u897f\uff0c\u4f46\u662f\u5728Web\u754c\u9762\u5c55\u793a\u8fd9\u5757\uff0cCSS\u957f\u671f\u7edf\u9886\u6c5f\u5c71\uff0cSVG\u5043\u65d7\u606f\u9f13\uff0c\u76f4\u5230\u8fd9\u4e9b\u5e74\uff0cSVG\u5f00\u59cb\u4e58\u52bf\u800c\u4e0a\u3002<\/p>\n

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\u4f46\uff0c\u65f6\u4ee3\u662f\u53d1\u5c55\u7684\uff0c\u73b0\u4ee3\u7f51\u7edc\u5e26\u5bbd\u6709\u5927\u817f\u7c97\uff0c\u7535\u8111\u6027\u80fd\u6bd4\u7b2c\u4e00\u6b21\u8fd8\u5feb\uff0c\u5c4f\u5e55\u5bc6\u5ea6\u6bd4\u59da\u660e\u8fd8\u9ad8\uff0c\u4e30\u5bcc\u7684\u5bcc\u5a92\u4f53\u5c55\u73b0\u548c\u590d\u6742\u7684\u56fe\u5f62\u8868\u73b0\u9700\u6c42\u8d8a\u6765\u8d8a\u9ad8\uff0c\u968f\u7740flash\u7684\u65e5\u6e10\u8870\u5fae\uff0c\u663e\u7136\uff0c\u89c4\u8303\u6807\u51c6\u5316\u7684SVG\u5c31\u987a\u52bf\u5d1b\u8d77\u3002<\/p>\n

\u7136\u800c\u9700\u6c42\u662f\u5343\u53d8\u4e07\u5316\u7684\uff0c\u5f53\u6211\u4eec\u4f7f\u7528SVG\u5b9e\u73b0\u4e00\u4e9b\u89c6\u89c9\u8868\u73b0\u7cbe\u6e5b\u7684\u6548\u679c\u7684\u65f6\u5019\uff0c\u514d\u4e0d\u4e86\u4f1a\u6709\u589e\u52a0\u4e00\u6bb5\u63cf\u8ff0\u6587\u5b57\u7684\u9700\u6c42\u3002\u5475\u5475\uff0c\u8fd9\u4e2a\u65f6\u5019SVG\u6015\u662f\u8981\u50bb\u773c\u4e86\uff0cSVG\u7684<text><\/code>\u5143\u7d20\u5e94\u4ed8\u591a\u884c\u6587\u5b57\u5b9e\u5728\u4e0d\u64c5\u957f\uff0c\u5982\u679cSVG\u4e2d\u7684\u6587\u5b57\u53ef\u4ee5\u5982\u540cCSS\u4e2d\u7684\u8868\u73b0\u4e00\u6837\u5c31\u597d\u4e86\uff1f<\/p>\n

\u563f\uff0c\u8fd8\u771f\u6709\uff0c\u90a3\u5c31\u662fSVG\u7684<foreignObject><\/code>\u5143\u7d20\u3002<\/p>\n

\u4e8c\u3001SVG forginObject\u5143\u7d20\u7b80\u4ecb<\/h3>\n

\u6211\u4eec\u5e73\u5e38\u4f7f\u7528SVG\u4f7f\u7528\u7684\u662fSVG\u7684\u547d\u540d\u7a7a\u95f4\uff1a<\/p>\n

<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><\/svg><\/pre>\n
xmlns<\/code>\u5168\u79f0\u662f\u201cXML Namespaces\u201d\uff0c\u6307\u201cXML\u547d\u540d\u7a7a\u95f4\u201d\u3002XML\u662f\u4e00\u4e2a\u6bd4\u8f83\u5927\u7684\u7edf\u79f0\uff0c\u662f\u4e00\u79cd\u7528\u4e8e\u6807\u8bb0\u7535\u5b50\u6587\u4ef6\u4f7f\u5176\u5177\u6709\u7ed3\u6784\u6027\u7684\u6807\u8bb0\u8bed\u8a00\u3002\u6211\u4eec\u5e73\u65f6\u5199\u7684HTML\u4ee3\u7801\u662fXML\uff0cRSS\u8ba2\u9605\u6587\u6863<\/a>\u4e5f\u662f\u79cdXML\uff0cSVG\u4e5f\u5c5e\u4e8eXML\u3002\u800c\u8fd9\u4e9bXML\u7c7b\u578b\u7684\u6e32\u67d3\u89c4\u5219\u662f\u6709\u5dee\u5f02\u7684\uff0c\u4f8b\u5982HTML\u4e2d\u88f8\u9732\u7684<circle><\/code>\u5143\u7d20\u662f\u4e0d\u4f1a\u8868\u73b0\u4e3a\u5706\uff0c\u800c\u662f\u4e00\u4e2a\u666e\u901a\u7684\u81ea\u5b9a\u4e49\u5143\u7d20\u3002RSS\u4e2d\u7684XML\u6d4f\u89c8\u5668\u4f1a\u81ea\u52a8\u8fdb\u884c\u6587\u7ae0\u6392\u7248\u6e32\u67d3\u7b49\u3002<\/p>\n
\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0c\u6307\u5b9a\u547d\u540d\u7a7a\u95f4\u53ef\u4ee5\u8ba9\u6d4f\u89c8\u5668\u7cbe\u51c6\u89e3\u6790\uff0c\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u5982\u4e0bXML\u4ee3\u7801\uff1a<\/p>\n
<svg width=\"12\" height=\"12\" viewBox=\"0 0 12 12\"><path d=\"M10.263 10.874L6 6.61l-4.264 4.264a.431.431 0 0 1-.61-.61L5.39 6.001 1.128 1.736a.431.431 0 0 1 .61-.61L6 5.391l4.264-4.263a.431.431 0 0 1 .61.61L6.61 6l4.262 4.264a.43.43 0 1 1-.61.609z\" stroke=\"#979797\" fill=\"#999\"\/><\/svg><\/pre>\n
\u867d\u7136\u662fSVG\u6807\u7b7e\uff0c\u660e\u6446\u7740\u5e94\u8be5\u5b89\u88c5SVG\u6e32\u67d3\uff0c\u4f46\u662f\uff0c\u5b9e\u9645\u4e0a\uff0c\u7531\u4e8e\u6ca1\u6709\u6307\u5b9axmlns<\/code>\uff0c\u5728\u6d4f\u89c8\u5668\u4e2d\u6253\u5f00\u7684\u65f6\u5019\uff0c\u76f4\u63a5\u4ee5\u666e\u901aXML\u6587\u6863\u6811\u6e32\u67d3\u4e86\u3002<\/p>\n
\u53ef\u72e0\u72e0\u7684\u70b9\u51fb\u6b64SVG\u6587\u4ef6\u4eb2\u81ea\u611f\u53d7\u4e0b\uff1aclose-no-ns.svg<\/a><\/p>\n
Chrome\u6d4f\u89c8\u5668\u4e0b\uff1a<\/p>\n
\"Chrome\u4e0b\u65e0\u547d\u540d\u7a7a\u95f4SVG\u4ee3\u7801\u8868\u73b0\u622a\u56fe\"<\/p>\n
Firefox\u6d4f\u89c8\u5668\u4e0b\uff1a<\/p>\n
\"Firefox\u4e0b\u65e0\u547d\u540d\u7a7a\u95f4SVG\u4ee3\u7801\u8868\u73b0\u622a\u56fe\"<\/p>\n
\u4e00\u65e6\u6211\u4eec\u52a0\u4e0a\u4e86SVG\u4e13\u5c5e\u547d\u540d\u7a7a\u95f4\uff0c\u5982\u4e0b\u4ee3\u7801\uff1a<\/p>\n
<svg width=\"12\" height=\"12\" viewBox=\"0 0 12 12\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"<\/span>><path d=\"M10.263 10.874L6 6.61l-4.264 4.264a.431.431 0 0 1-.61-.61L5.39 6.001 1.128 1.736a.431.431 0 0 1 .61-.61L6 5.391l4.264-4.263a.431.431 0 0 1 .61.61L6.61 6l4.262 4.264a.43.43 0 1 1-.61.609z\" stroke=\"#979797\" fill=\"#999\"\/><\/svg><\/pre>\n
\u5219\u7b26\u5408\u9884\u671f\u7684SVG\u56fe\u5f62\u5c31\u6e32\u67d3\u51fa\u6765\u4e86\u3002<\/p>\n
\u53ef\u72e0\u72e0\u7684\u70b9\u51fb\u6b64SVG\u6587\u4ef6\u4eb2\u81ea\u611f\u53d7\u4e0b\uff1aclose.svg<\/a><\/p>\n
\u7ed3\u679c\u5982\u4e0b\u622a\u56fe\uff1a<\/p>\n
\"Chrome\u6709\u547d\u540d\u7a7a\u95f4SVG\u4ee3\u7801\u8868\u73b0\u622a\u56fe\"<\/pre>\n
\u8fd9\u5c31\u662f\u547d\u540d\u7a7a\u95f4\u7684\u4f5c\u7528\u3002\u4f46\u8fd9\u91cc\u6709\u5fc5\u8981\u989d\u5916\u8bf4\u660e<\/strong>\u4e0b\uff1a\u5982\u679c\u6211\u4eec\u7684SVG\u6587\u4ef6\u662f\u76f4\u63a5\u5185\u8054\u5728XHTML\u9875\u9762\u4e2d\uff0c\u662f\u53ef\u4ee5\u4e0d\u6307\u5b9a\u547d\u540d\u7a7a\u95f4\u7684\uff01<\/p>\n
\u597d\uff0c\u56de\u5230<foreignObject><\/code>\u8fd9\u91cc\uff0c<foreignObject><\/code>\u5143\u7d20\u7684\u4f5c\u7528\u662f\u53ef\u4ee5\u5728\u5176\u4e2d\u4f7f\u7528\u5177\u6709\u5176\u5b83XML\u547d\u540d\u7a7a\u95f4\u7684XML\u5143\u7d20\uff0c\u6362\u53e5\u8bdd\u8bf4\u501f\u52a9<foreignObject><\/code>\u6807\u7b7e\uff0c\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u5728SVG\u5185\u90e8\u5d4c\u5165XHTML\u5143\u7d20\uff0c\u4e3e\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff1a<\/p>\n
<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\r\n  <foreignObject width=\"120\" height=\"50\">\r\n      <body xmlns=\"http:\/\/www.w3.org\/1999\/xhtml\">\r\n        <p>\u6587\u5b57\u3002<\/p>\r\n      <\/body>\r\n    <\/foreignObject>\r\n<\/svg><\/pre>\n
\u53ef\u4ee5\u770b\u5230<foreignObject><\/code>\u6807\u7b7e\u91cc\u9762\u6709\u4e00\u4e2a\u8bbe\u7f6e\u4e86xmlns=\"http:\/\/www.w3.org\/1999\/xhtml\"<\/code>\u547d\u540d\u7a7a\u95f4\u7684<body><\/code>\u6807\u7b7e\uff0c\u6b64\u65f6<body><\/code>\u6807\u7b7e\u53ca\u5176\u5b50\u6807\u7b7e\u90fd\u4f1a\u6309\u7167XHTML\u6807\u51c6\u6e32\u67d3\uff0c\u5b9e\u73b0\u4e86SVG\u548cXHTML\u7684\u6df7\u5408\u4f7f\u7528\u3002<\/p>\n
\u8fd9\u79cd\u6df7\u5408\u7279\u6027\u6709\u4ec0\u4e48\u4f5c\u7528\u5462\uff1f\u4f5c\u7528\u5f88\u591a\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u8f7b\u677e\u5b9e\u73b0SVG\u5185\u7684\u6587\u672c\u81ea\u52a8\u6362\u884c\u3002<\/p>\n
\u4e09\u3001SVG forginObject\u5143\u7d20\u4e0e\u6587\u672c\u81ea\u52a8\u6362\u884c<\/h3>\n
SVG\u8981\u5b9e\u73b0\u6587\u672c\u6362\u884c\uff0c\u5f80\u5f80\u9700\u8981\u624b\u52a8\u963b\u65ad\uff0c\u7c7b\u4f3c\u4e0b\u9762\u7684\u4ee3\u7801\uff1a<\/p>\n
<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\r\n  <text font-size=\"12\">\r\n    <tspan x=\"0\" y=\"10\">\u4e00\u6bb5\u9700\u8981word wrap<\/tspan>\r\n    <tspan x=\"0\" y=\"26\">\u7684\u6587\u5b57\u3002<\/tspan>\r\n  <\/text>\r\n<\/svg><\/pre>\n
\u9700\u89812<\/code>\u4e2a<tspan><\/code>\u5143\u7d20\uff0c\u8fd9\u4e00\u70b9\u90fd\u4e0d\u5de5\u7a0b\u3002\u867d\u7136Chrome\u6d4f\u89c8\u5668\u53ef\u4ee5\u5bf9<text><\/code>\u6807\u7b7e\u8fdb\u884cwhite-space:normal<\/code>\u7684\u5f3a\u5236\u8bbe\u7f6e\uff0c\u4f46\u4e5f\u53ea\u662fChrome\u6d4f\u89c8\u5668\u53ef\u4ee5\u3002<\/p>\n
\u4f46\u662f\u5982\u679c\u4f7f\u7528<foreignObject><\/code>\u5143\u7d20\uff0c\u5219\u81ea\u52a8\u6362\u884c\u5c31\u662f\u5c0f\u83dc\uff1a<\/p>\n
<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\r\n  <foreignObject width=\"120\" height=\"50\">\r\n      <body xmlns=\"http:\/\/www.w3.org\/1999\/xhtml\">\r\n        <p style=\"font-size:12px;margin:0;\">\u4e00\u6bb5\u9700\u8981word wrap\u7684\u6587\u5b57\u3002<\/p>\r\n      <\/body>\r\n    <\/foreignObject>\r\n<\/svg><\/pre>\n
\u7ed3\u679cChrome\u6d4f\u89c8\u5668\u4e0b\u6548\u679c\u4e3a\uff1a<\/p>\n
\"foreignObject\u6587\u672c\u6362\u884c\u6548\u679c\u622a\u56fe\"<\/p>\n
\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1aforeignObject\u4e0b\u6587\u672c\u81ea\u52a8\u6362\u884cdemo<\/a><\/p>\n
\u56db\u3001SVG forginObject\u5143\u7d20\u5176\u5b83\u4f5c\u7528-\u56fe\u7247\u751f\u6210<\/h3>\n
\u9664\u4e86\u8f7b\u677e\u5b9e\u73b0\u6587\u672c\u6362\u884c\uff0cSVG <foreignObject><\/code>\u5143\u7d20\u8fd8\u6709\u5176\u4ed6\u66f4\u9ad8\u7ea7\u7684\u5e94\u7528\uff0c\u5c31\u662f\u53ef\u4ee5\u5c06\u9875\u9762\u4e0a\u7684DOM\u5143\u7d20\u8f7b\u677e\u53d8\u6210\u56fe\u7247\uff0c\u539f\u7406\u5982\u4e0b\uff1a<\/p>\n
    \n
  1. \u83b7\u53d6\u5bf9\u5e94DOM\u5143\u7d20\u7684outerHTML<\/code>\u4ee3\u7801\uff1b<\/li>\n
  2. \u653e\u5728<foreignObject><\/code>\u5143\u7d20\u4e2d\uff1b<\/li>\n
  3. \u56fe\u7247\u65b9\u5f0f\u663e\u793a\u6211\u4eec\u7684SVG\u56fe\u5f62\uff0c\u4f8b\u5982\uff1a\n
    <img width=\"300\" height=\"150\" src='data:image\/svg+xml;charset=utf-8,<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><foreignObject width=\"120\" height=\"50\"><body xmlns=\"http:\/\/www.w3.org\/1999\/xhtml\"><p style=\"font-size:12px;margin:0;\">\u4e00\u6bb5\u9700\u8981word wrap\u7684\u6587\u5b57\u3002<\/p><\/body><\/foreignObject><\/svg>'><\/pre>\n<\/li>\n
  4. \u4e0a\u4e00\u6b65\u7684\u56fe\u7247\u672c\u8d28\u8fd8\u662fSVG\uff0c\u6211\u4eec\u53ef\u4ee5\u501f\u52a9canvas<\/code> drawImage()<\/code>\u65b9\u6cd5\u5c06\u56fe\u7247\u653e\u5728\u753b\u5e03\u4e0a\uff0c\u7136\u540e\u4f7f\u7528canvas.toDataURL()<\/code>\u65b9\u6cd5\u8f6c\u6362\u6210png<\/code>\u6216jpg<\/code>\u56fe\u7247\uff0c\u6838\u5fc3\u4ee3\u7801\uff1a\n
    var canvas = document.createElement('canvas');\r\nvar context = canvas.getContext('2d');\r\ncanvas.drawImage(img, 0, 0);\r\nimg.src = canvas.toDataURL('image\/png');<\/pre>\n
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