{"id":3620,"date":"2024-11-10T17:41:34","date_gmt":"2024-11-10T09:41:34","guid":{"rendered":"https:\/\/fwq.ai\/blog\/3620\/"},"modified":"2024-11-10T17:41:34","modified_gmt":"2024-11-10T09:41:34","slug":"javascript-%e6%9e%84%e9%80%a0%e5%87%bd%e6%95%b0%e4%b8%ad-setinterval-%e7%9a%84-this-%e6%8c%87%e5%90%91%e9%97%ae%e9%a2%98%e5%a6%82%e4%bd%95%e8%a7%a3%e5%86%b3%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/3620\/","title":{"rendered":"JavaScript \u6784\u9020\u51fd\u6570\u4e2d setInterval \u7684 this \u6307\u5411\u95ee\u9898\u5982\u4f55\u89e3\u51b3\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173107302967743.jpg\" class=\"aligncenter\" title=\"JavaScript \u6784\u9020\u51fd\u6570\u4e2d setInterval \u7684 this \u6307\u5411\u95ee\u9898\u5982\u4f55\u89e3\u51b3\uff1f\u63d2\u56fe\" alt=\"JavaScript \u6784\u9020\u51fd\u6570\u4e2d setInterval \u7684 this \u6307\u5411\u95ee\u9898\u5982\u4f55\u89e3\u51b3\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5728\u6784\u9020\u51fd\u6570\u91cc\u4f7f\u7528 setinterval \u65f6 this \u6307\u5411\u7684\u95ee\u9898\u89e3\u7b54<\/strong><\/p>\n<p>\u5728 javascript \u4e2d\uff0c\u6784\u9020\u51fd\u6570\u5185\u90e8\u7684 this \u6307\u5411\u5b9e\u4f8b\u5bf9\u8c61\u3002\u4f46\u662f\uff0c\u5728 setinterval \u56de\u8c03\u51fd\u6570\u4e2d\uff0cthis \u5374\u6307\u5411 window \u5bf9\u8c61\u3002\u8fd9\u4f1a\u5bfc\u81f4 this \u6307\u5411\u95ee\u9898\uff0c\u5bfc\u81f4\u65e0\u6cd5\u8bbf\u95ee\u5b9e\u4f8b\u5bf9\u8c61\u7684\u65b9\u6cd5\u3002<\/p>\n<p><strong>\u89e3\u51b3\u65b9\u6cd5\uff1a<\/strong><\/p>\n<p>\u6709\u4e24\u79cd\u65b9\u6cd5\u53ef\u4ee5\u89e3\u51b3\u6b64\u95ee\u9898\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<ul>\n<li><strong>\u4f7f\u7528 bind \u65b9\u6cd5\uff1a<\/strong><\/li>\n<\/ul>\n<pre>\/\/ \u521b\u5efa\u6784\u9020\u51fd\u6570\nfunction myconstructor() {\n  this.circle = function() {...};\n}\n\n\/\/ \u4f7f\u7528 bind \u7ed1\u5b9a this\nconst _this = this;\nsetinterval(function() {\n  _this.circle();\n}, 1000);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u7bad\u5934\u51fd\u6570\uff1a<\/strong><\/li>\n<\/ul>\n<pre>\/\/ \u521b\u5efa\u6784\u9020\u51fd\u6570\nfunction MyConstructor() {\n  this.circle = function() {...};\n}\n\n\/\/ \u4f7f\u7528\u7bad\u5934\u51fd\u6570\u4fdd\u6301 this \u6307\u5411\nsetInterval(() =&gt; {\n  this.circle();\n}, 1000);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fJavaScript \u6784\u9020\u51fd\u6570\u4e2d setInterval \u7684 this \u6307\u5411\u95ee\u9898\u5982\u4f55\u89e3\u51b3\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>\u5728\u6784\u9020\u51fd\u6570\u91cc\u4f7f\u7528 setinterval \u65f6 this \u6307\u5411\u7684\u95ee\u9898\u89e3\u7b54 \u5728 javascript \u4e2d\uff0c\u6784\u9020\u51fd\u6570\u5185\u90e8\u7684 this \u6307\u5411\u5b9e\u4f8b\u5bf9\u8c61\u3002\u4f46\u662f\uff0c\u5728 setinterval \u56de\u8c03\u51fd\u6570\u4e2d\uff0cthis \u5374\u6307\u5411 window \u5bf9\u8c61\u3002\u8fd9\u4f1a\u5bfc\u81f4 this \u6307\u5411\u95ee\u9898\uff0c\u5bfc\u81f4\u65e0\u6cd5\u8bbf\u95ee\u5b9e\u4f8b\u5bf9\u8c61\u7684\u65b9\u6cd5\u3002 \u89e3\u51b3\u65b9\u6cd5\uff1a \u6709\u4e24\u79cd\u65b9\u6cd5\u53ef\u4ee5\u89e3\u51b3\u6b64\u95ee\u9898\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u4f7f\u7528 bind \u65b9\u6cd5\uff1a \/\/ \u521b\u5efa\u6784\u9020\u51fd\u6570 function myconstructor() { this.circle = function() {&#8230;}; } \/\/ \u4f7f\u7528 bind \u7ed1\u5b9a this const _this = this; setinterval(function() { _this.circle(); }, 1000); \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528\u7bad\u5934\u51fd\u6570\uff1a \/\/ \u521b\u5efa\u6784\u9020\u51fd\u6570 function MyConstructor() { this.circle [&hellip;]<\/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-3620","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3620","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=3620"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3620\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=3620"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=3620"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=3620"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}