{"id":65,"date":"2021-05-08T20:44:59","date_gmt":"2021-05-08T12:44:59","guid":{"rendered":"https:\/\/www.52dixiaowo.com\/vuejs\/?p=65"},"modified":"2021-06-02T11:46:29","modified_gmt":"2021-06-02T03:46:29","slug":"v-for%e9%81%8d%e5%8e%86%e6%95%b0%e7%bb%84%e5%92%8c%e5%af%b9%e8%b1%a1","status":"publish","type":"post","link":"https:\/\/www.52dixiaowo.com\/vuejs\/post-65.html","title":{"rendered":"v-for\u904d\u5386\u6570\u7ec4\u548c\u5bf9\u8c61"},"content":{"rendered":"\n

v-for<\/code> \u5e38\u7528\u4e8e\u904d\u5386\u6570\u7ec4\u6216\u5bf9\u8c61, \u524d\u7aef\u4f7f\u7528 li \u8f93\u51fa<\/p>\n\n\n\n

\u904d\u5386\u6570\u7ec4<\/h2>\n\n\n\n

\u9996\u5148\u521b\u5efa\u4e00\u4e2a json \u6570\u7ec4\u5bf9\u8c61 items, \u6bcf\u4e00\u9879\u53d6\u540d message, \u63a5\u7740\u4f7f\u7528 v-for<\/code> \u904d\u5386<\/p>\n\n\n\n

\u4f7f\u7528\u4e86 v-for<\/code> \u7684\u5bf9\u8c61, \u4f1a\u81ea\u52a8\u521b\u5efa\u591a\u4e2a, \u6bd4\u5982\u4e0b\u9762\u7684 li<\/code> \u6807\u7b7e<\/p>\n\n\n\n

<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/vue\/dist\/vue.js\"><\/script>\n<h2>v-for\u4f8b\u5b501<\/h2>\n<ul id=\"app\">\n  <li v-for=\"item in items\">\n\t{{ item.message }}\n  <\/li>\n<\/ul>\n<script>\nvar vm = new Vue({\n  el: '#app',\n  data: {\n\titems: [\n\t  { message: 'Foo' },\n\t  { message: 'Bar' }\n\t]\n  }\n});\n<\/script><\/code><\/pre>\n\n\n\n
\u6570\u7ec4\u7b2c\u4e8c\u53c2\u6570-\u7d22\u5f15<\/h2>\n\n\n\n
\u5728 v-for<\/code> \u904d\u5386\u6570\u7ec4\u65f6, \u53ef\u4ee5\u6709\u7b2c\u4e8c\u4e2a\u53c2\u6570, \u5b83\u5fc5\u987b\u662f\u7d22\u5f15, \u4e0e\u53d8\u91cf\u540d\u65e0\u5173<\/p>\n\n\n\n
<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/vue\/dist\/vue.js\"><\/script>\n<h2>v-for\u4f8b\u5b502<\/h2>\n<ul id=\"app\">\n  <li v-for=\"(item,index) in items\">\n\t{{ parentMessage }} - {{ index }} - {{ item.message }}\n  <\/li>\n<\/ul>\n<script>\nvar vm = new Vue({\n  el: '#app',\n  data: {\n\tparentMessage: 'Parent',\n\titems: [\n\t  { message: 'Foo' },\n\t  { message: 'Bar' }\n\t]\n  }\n});\n<\/script>\n<\/code><\/pre>\n\n\n\n
v-for\u904d\u5386\u5bf9\u8c61<\/h2>\n\n\n\n
\u904d\u5386\u5bf9\u8c61\u548c\u6570\u7ec4\u5341\u5206\u76f8\u4f3c, \u5199\u6cd5\u76f8\u540c, \u6bd4\u5982\u4e0b\u9762\u7684\u7b80\u5355\u4f8b\u5b50<\/p>\n\n\n\n
<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/vue\/dist\/vue.js\"><\/script>\n<h2>v-for\u4f8b\u5b503<\/h2>\n<ul id=\"v-for-object\" class=\"demo\">\n  <li v-for=\"value in object\">\n\t{{ value }}\n  <\/li>\n<\/ul>\n<script>\nnew Vue({\n  el: '#v-for-object',\n  data: {\n\tobject: {\n\t  title: 'How to do lists in Vue',\n\t  author: 'Jane Doe',\n\t  publishedAt: '2016-04-10'\n\t}\n  }\n});\n<\/script><\/code><\/pre>\n\n\n\n
\u5bf9\u8c61\u7b2c\u4e8c\u7b2c\u4e09\u53c2\u6570<\/h2>\n\n\n\n
\u5bf9\u8c61\u7684\u7b2c\u4e8c\u53c2\u6570\u662f : \u952e\u540d, \u4e5f\u5c31\u662f\u6570\u636e\u7684\u540d\u79f0<\/p>\n\n\n\n
<div v-for=\"(value, name) in object\">\n  {{ name }}: {{ value }}\n<\/div><\/code><\/pre>\n\n\n\n
\u5bf9\u8c61\u7684\u7b2c\u4e09\u53c2\u6570\u662f : \u7d22\u5f15, \u4e5f\u662f\u4ece0\u5f00\u59cb<\/p>\n\n\n\n
<div v-for=\"(value, name, index) in object\">\n  {{ index }}. {{ name }}: {{ value }}\n<\/div><\/code><\/pre>\n\n\n\n
\u5728\u904d\u5386\u5bf9\u8c61\u65f6, vue \u4e0d\u4fdd\u8bc1\u5728\u6240\u6709\u7684 js \u5f15\u64ce\u4e0b\u76f8\u540c\u987a\u5e8f.<\/p>\n\n\n\n
\u7ef4\u62a4\u72b6\u6001<\/h2>\n\n\n\n
\u5728\u4f7f\u7528 v-for \u6e32\u67d3\u65f6, \u5982\u679c\u6570\u636e\u9879\u7684\u987a\u5e8f\u4e2d\u9014\u88ab\u6539\u53d8, \u90a3\u4e48\u8f93\u51fa\u7684\u503c\u5c31\u4f1a\u4e0d\u540c, \u4e3a\u4e86\u628a \u987a\u5e8f \u548c \u6570\u636e\u4e00\u4e00\u5bf9\u5e94,  \u4ee5\u4fbf\u91cd\u7528\u548c\u91cd\u65b0\u6392\u5e8f\u73b0\u6709\u5143\u7d20\uff0c\u4f60\u9700\u8981\u4e3a\u6bcf\u9879\u63d0\u4f9b\u4e00\u4e2a\u552f\u4e00 key<\/code> attribute\uff1a<\/p>\n\n\n\n
<div v-for=\"item in items\" v-bind:key=\"item.id\">\n  <!-- \u5185\u5bb9 -->\n<\/div><\/code><\/pre>\n\n\n\n
\u5b9e\u4f8b, \u5982\u4e0b<\/p>\n\n\n\n
<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/vue\/dist\/vue.js\"><\/script>\n<h2>v-for\u4f8b\u5b504<\/h2>\n<ul id=\"example-1\">\n  <li v-for=\"item in items\" :key=\"item.message\">\n\t{{ item.message }}\n  <\/li>\n<\/ul>\n<script>\nvar example1 = new Vue({\n  el: '#example-1',\n  data: {\n\titems: [\n\t  { message: 'Foo' },\n\t  { message: 'Bar' }\n\t]\n  }\n});\n<\/script><\/code><\/pre>\n\n\n\n
\u540e\u7eed\u7684\u7ae0\u8282\u4e2d, \u53ef\u4ee5\u4e86\u89e3\u5230 key \u5728 v-for \u4e2d\u8fd8\u6709\u5176\u4ed6\u7528\u9014.  \u6bd4\u5982v-for\u8fd8\u652f\u6301\u7684\u65b9\u6cd5\u6709<\/p>\n\n\n\n