{"id":39,"date":"2009-03-23T10:29:43","date_gmt":"2009-03-23T02:29:43","guid":{"rendered":"http:\/\/leegorous.net\/?p=39"},"modified":"2012-03-04T00:47:40","modified_gmt":"2012-03-03T16:47:40","slug":"auto-resize-loaded-img","status":"publish","type":"post","link":"http:\/\/leegorous.net\/blog\/2009\/03\/23\/auto-resize-loaded-img\/","title":{"rendered":"Img\u88c5\u8f7d\u5b8c\u6bd5\u540e\u81ea\u52a8\u8c03\u6574\u5927\u5c0f"},"content":{"rendered":"<p>\u5728show\u56fe\u7247\u7684\u65f6\u5019\u7ecf\u5e38\u9700\u8981\u7528\u5230\u5b83\uff0c\u5927\u6982\u662f\u5927\u5bb6\u90fd\u6bd4\u8f83\u61d2\u53bb\u4e3a\u6bcf\u4e2a\u56fe\u8c03\u6574\u5927\u5c0f\uff0c\u7528Photoshop\u7684\u6279\u5904\u7406\u662f\u53ef\u4ee5\u7701\u6389\u5f88\u591a\u529f\u592b\u4e86\uff0c\u4f46\u4e3a\u6c42\u66f4\u7701\u4e8b\uff0c\u7528\u811a\u672c\u5566\u3002<\/p>\n<pre name=\"code\" class=\"brush: html\">\r\n&lt;img id=&quot;inu&quot; src=&quot;your-image-path.jpg&quot; onload = &quot;resize(this)&quot; \/&gt;\r\n<\/pre>\n<p>\u5728\u9875\u9762\u91cc\u63d2\u4e00\u884c\u5c31\u53ef\u4ee5\u4e86(resize\u51fd\u6570\u4f53\u5728\u4e0b\u9762)\uff0c\u5982\u679c\u56fe\u50cf\u662f\u52a8\u6001\u88c5\u8f7d\u7684<\/p>\n<pre name=\"code\" class=\"brush: js\">\r\nvar img = document.createElement(&#039;img&#039;);\r\nimg.onload = resize;\r\nimg.src = &quot;http:\/\/farm4.static.flickr.com\/3575\/3343323074_499a81709c_o.png&quot;;\r\n\r\nvar MAX_IMAGE_SIZE = {\r\n\tx: 400,\r\n\ty: 400\r\n};\r\n\r\nfunction resize(obj) {\r\n\tvar img = obj || this;\r\n\tvar size = MAX_IMAGE_SIZE;\r\n\tvar rate = img.offsetWidth \/ img.offsetHeight;\r\n\tif (img.offsetWidth &gt; size.x) {\r\n\t\timg.style.width = size.x + &quot;px&quot;;\r\n\t\timg.style.height = size.x \/ rate + &quot;px&quot;;\r\n\t}\r\n\tif (img.offsetHeight &gt; size.y) {\r\n\t\timg.style.width = size.y * rate + &quot;px&quot;;\r\n\t\timg.style.height = size.y + &quot;px&quot;;\r\n\t}\r\n\t\/\/ \u5982\u679c\u6709\u9700\u8981\u5c45\u4e2d\u7684\u8bdd\uff0c\u7528CSS\u4e5f\u53ef\u4ee5\u5b9e\u73b0\r\n\treCenter(img, size);\r\n}\r\n\r\nfunction reCenter(img, size) {\r\n\tif (img.offsetHeight &lt; size.y) {\r\n\t\timg.style.marginTop = (size.y - img.offsetHeight)\/2 + &quot;px&quot;;\r\n\t}\r\n\tif (img.offsetWidth &lt; size.x) {\r\n\t\timg.style.marginLeft = (size.x - img.offsetWidth)\/2 + &quot;px&quot;;\r\n\t}\r\n}\r\n<\/pre>\n<p>\u7f51\u4e0a\u4e5f\u6709\u4e0d\u5c11\u8bf4onload\u4e8b\u4ef6\u5728\u4e0d\u540c\u6d4f\u89c8\u5668\u91cc\u7684\u4e0d\u540c\u73b0\u8c61\uff0cNetscape(\u56fd\u5185\u6ca1\u4ec0\u4e48\u4eba\u7528\u4e86\u5427) \u548c IE\u4e0d\u662f\u6bcf\u6b21\u90fd\u89e6\u53d1onload\u4e8b\u4ef6\uff0c\u53ea\u6709\u4ece\u7f51\u4e0a\u4e0b\u8f7d\u65f6\u624d\u6267\u884c\uff0c\u4ece\u7f13\u5b58\u91cc\u88c5\u8f7d\u540e\u4e0d\u6267\u884c\u3002<\/p>\n<p>\u90a3\u5e94\u8be5\u662f\u56e0\u4e3a\u8bbe\u7f6eonload\u5728\u8bbe\u7f6esrc\u4e4b\u540e\uff0c\u8bbe\u7f6esrc\u540e\u6d4f\u89c8\u5668\u968f\u5373\u4ece\u7f13\u5b58\u91cc\u88c5\u8f7d\u597d\u4e86\uff0c\u90a3\u65f6\u518d\u6307\u5b9aonload\u4e3a\u65f6\u5df2\u665a\u4e86\uff0c\u4f46\u5728Firefox\u91cc\u5728\u524d\u5728\u540e\u90fd\u59cb\u7ec8\u5982\u4e00\u3002\u6700\u7a33\u662f\u5728src\u4e4b\u524d\u8bbe\u7f6eonload\u5c5e\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728show\u56fe\u7247\u7684\u65f6\u5019\u7ecf\u5e38\u9700\u8981\u7528\u5230\u5b83\uff0c\u5927\u6982\u662f\u5927\u5bb6\u90fd\u6bd4\u8f83\u61d2\u53bb\u4e3a\u6bcf\u4e2a\u56fe\u8c03\u6574\u5927\u5c0f\uff0c\u7528Photoshop\u7684\u6279\u5904\u7406\u662f\u53ef\u4ee5\u7701 &hellip; <\/p>\n<p class=\"link-more\"><a href=\"http:\/\/leegorous.net\/blog\/2009\/03\/23\/auto-resize-loaded-img\/\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u201cImg\u88c5\u8f7d\u5b8c\u6bd5\u540e\u81ea\u52a8\u8c03\u6574\u5927\u5c0f\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[4,8,9],"_links":{"self":[{"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/posts\/39"}],"collection":[{"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/comments?post=39"}],"version-history":[{"count":2,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/posts\/39\/revisions"}],"predecessor-version":[{"id":1079,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/posts\/39\/revisions\/1079"}],"wp:attachment":[{"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/media?parent=39"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/categories?post=39"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/leegorous.net\/blog\/wp-json\/wp\/v2\/tags?post=39"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}