{"id":3810,"date":"2024-11-10T16:59:42","date_gmt":"2024-11-10T08:59:42","guid":{"rendered":"https:\/\/fwq.ai\/blog\/3810\/"},"modified":"2024-11-10T16:59:42","modified_gmt":"2024-11-10T08:59:42","slug":"%e5%9c%a8%e6%9e%84%e9%80%a0%e5%87%bd%e6%95%b0%e4%b8%ad%e4%bd%bf%e7%94%a8-setinterval-%e6%97%b6%ef%bc%8c%e5%a6%82%e4%bd%95%e8%a7%a3%e5%86%b3-this-%e6%8c%87%e5%90%91%e9%97%ae%e9%a2%98%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/3810\/","title":{"rendered":"\u5728\u6784\u9020\u51fd\u6570\u4e2d\u4f7f\u7528 setInterval \u65f6\uff0c\u5982\u4f55\u89e3\u51b3 this \u6307\u5411\u95ee\u9898\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173114571225944.jpg\" class=\"aligncenter\" title=\"\u5728\u6784\u9020\u51fd\u6570\u4e2d\u4f7f\u7528 setInterval \u65f6\uff0c\u5982\u4f55\u89e3\u51b3 this \u6307\u5411\u95ee\u9898\uff1f\u63d2\u56fe\" alt=\"\u5728\u6784\u9020\u51fd\u6570\u4e2d\u4f7f\u7528 setInterval \u65f6\uff0c\u5982\u4f55\u89e3\u51b3 this \u6307\u5411\u95ee\u9898\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>\u6784\u9020\u51fd\u6570\u4e2d\u4f7f\u7528 setinterval \u7684\u95ee\u9898<\/strong><\/p>\n<p>\u5728\u6784\u9020\u51fd\u6570\u4e2d\u4f7f\u7528 setinterval \u65f6\u53ef\u80fd\u4f1a\u9047\u5230\u6307\u5411\u95ee\u9898\u3002\u5f53 this \u6307\u5411\u6539\u53d8\u65f6\uff0csetinterval \u5c06\u4e0d\u518d\u6b63\u786e\u5730\u8c03\u7528\u65b9\u6cd5\u3002\u89e3\u51b3\u65b9\u6cd5\u5305\u62ec\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528 bind \u65b9\u6cd5<\/strong><\/p>\n<p>bind\u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u51fd\u6570\uff0c\u5e76\u6307\u5b9a\u65b0\u51fd\u6570\u7684 this \u5173\u952e\u8bcd\uff1a<\/p>\n<pre>_this.circle.bind(this)<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f7f\u7528\u7bad\u5934\u51fd\u6570<\/strong><\/p>\n<p>\u7bad\u5934\u51fd\u6570\u59cb\u7ec8\u7ee7\u627f\u5176\u5916\u5c42\u7684 this \u6307\u5411\uff1a<\/p>\n<pre>setInterval(() =&gt; {\n  _this.circle()\n})<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u5728\u6784\u9020\u51fd\u6570\u4e2d\u4f7f\u7528 setInterval \u65f6\uff0c\u5982\u4f55\u89e3\u51b3 this \u6307\u5411\u95ee\u9898\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6784\u9020\u51fd\u6570\u4e2d\u4f7f\u7528 setinterval \u7684\u95ee\u9898 \u5728\u6784\u9020\u51fd\u6570\u4e2d\u4f7f\u7528 setinterval \u65f6\u53ef\u80fd\u4f1a\u9047\u5230\u6307\u5411\u95ee\u9898\u3002\u5f53 this \u6307\u5411\u6539\u53d8\u65f6\uff0csetinterval \u5c06\u4e0d\u518d\u6b63\u786e\u5730\u8c03\u7528\u65b9\u6cd5\u3002\u89e3\u51b3\u65b9\u6cd5\u5305\u62ec\uff1a 1. \u4f7f\u7528 bind \u65b9\u6cd5 bind\u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u51fd\u6570\uff0c\u5e76\u6307\u5b9a\u65b0\u51fd\u6570\u7684 this \u5173\u952e\u8bcd\uff1a _this.circle.bind(this) \u767b\u5f55\u540e\u590d\u5236 2. \u4f7f\u7528\u7bad\u5934\u51fd\u6570 \u7bad\u5934\u51fd\u6570\u59cb\u7ec8\u7ee7\u627f\u5176\u5916\u5c42\u7684 this \u6307\u5411\uff1a setInterval(() =&gt; { _this.circle() }) \u767b\u5f55\u540e\u590d\u5236 \u4ee5\u4e0a\u5c31\u662f\u5728\u6784\u9020\u51fd\u6570\u4e2d\u4f7f\u7528 setInterval \u65f6\uff0c\u5982\u4f55\u89e3\u51b3 this \u6307\u5411\u95ee\u9898\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-3810","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3810","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=3810"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3810\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=3810"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=3810"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=3810"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}