{"id":301815,"date":"2024-05-20T18:18:29","date_gmt":"2024-05-20T10:18:29","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/301815.html"},"modified":"2024-05-20T18:18:42","modified_gmt":"2024-05-20T10:18:42","slug":"tkinter-after-%e6%96%b9%e6%b3%95%e5%88%b0%e5%ba%95%e6%98%af%e5%a6%82%e4%bd%95%e5%b7%a5%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/301815.html","title":{"rendered":"tkinter.after() \u65b9\u6cd5\u5230\u5e95\u662f\u5982\u4f55\u5de5\u4f5c"},"content":{"rendered":"

\"tkinter.after()<\/p>\n

Tkinter\u7684after()<\/code>\u65b9\u6cd5\u662f\u4e00\u79cd\u8c03\u5ea6\u5668\uff0c\u7528\u4e8e\u5728\u6307\u5b9a\u7684\u6beb\u79d2\u6570\u540e\u8c03\u7528\u4e00\u4e2a\u51fd\u6570\u6216\u8005\u4e00\u4e2aTkinter\u4e8b\u4ef6\u3001\u5b9e\u73b0\u5b9a\u65f6\u4efb\u52a1\u4ee5\u53ca\u91cd\u590d\u6267\u884c\u4efb\u52a1<\/strong>\u3002\u8fd9\u4e2a\u51fd\u6570\u4e3a\u57fa\u4e8e\u65f6\u95f4\u7684\u4e8b\u4ef6\u5904\u7406\u63d0\u4f9b\u4e86\u5f88\u5927\u7684\u7075\u6d3b\u6027\uff0c\u4f8b\u5982\u52a8\u753b\u3001\u5b9a\u65f6\u66f4\u65b0UI\u5143\u7d20\u7b49\u3002after()<\/code>\u65b9\u6cd5\u7684\u6838\u5fc3\u5de5\u4f5c\u539f\u7406\u57fa\u4e8eTkinter\u4e3b\u4e8b\u4ef6\u5faa\u73af\u3002\u8fd9\u4e2a\u5faa\u73af\u8d1f\u8d23\u76d1\u63a7\u4e8b\u4ef6\u7684\u53d1\u751f\u5e76\u505a\u51fa\u54cd\u5e94\uff0c\u800cafter()<\/code>\u5219\u5728\u8fd9\u4e2a\u4e8b\u4ef6\u5faa\u73af\u4e2d\u63d2\u5165\u4e00\u4e2a\u8ba1\u65f6\u4e8b\u4ef6\uff0c\u5f53\u8fbe\u5230\u9884\u5b9a\u65f6\u95f4\u65f6\uff0c\u4e8b\u4ef6\u5faa\u73af\u5c06\u8c03\u7528\u4e0e\u8be5\u8ba1\u65f6\u5668\u5173\u8054\u7684\u51fd\u6570\u3002<\/p>\n<\/p>\n

\u4e00\u3001AFTER() \u65b9\u6cd5\u7684\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n

after()<\/code>\u65b9\u6cd5\u901a\u5e38\u63a5\u6536\u4e24\u4e2a\u5fc5\u8981\u7684\u53c2\u6570\uff1a\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u65f6\u95f4\uff0c\u4ee5\u6beb\u79d2\u4e3a\u5355\u4f4d\uff1b\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u5728\u65f6\u95f4\u5230\u8fbe\u540e\u8981\u8c03\u7528\u7684\u51fd\u6570\u540d\u3002\u8fd8\u53ef\u9009\u5730\u4f20\u9012\u66f4\u591a\u7684\u53c2\u6570\u7ed9\u5c06\u8981\u8c03\u7528\u7684\u51fd\u6570\u3002<\/p>\n<\/p>\n

\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/strong><\/p>\n<\/p>\n

import tkinter as tk<\/p>\n
def update_label():<\/p>\n
    label.config(text="\u65f6\u95f4\u5230\u4e86\uff01")<\/p>\n
root = tk.Tk()<\/p>\n
label = tk.Label(root, text="\u7b49\u5f855\u79d2\u949f...")<\/p>\n
label.pack()<\/p>\n
\u8bbe\u7f6eafter\u65b9\u6cd5\u5b9a\u65f6\u8c03\u7528update_label\u51fd\u6570<\/strong><\/h2>\n
root.after(5000, update_label)<\/p>\n
root.mAI<\/a>nloop()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4ee5\u4e0a\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2a\u7b80\u5355\u7684GUI\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2a\u6807\u7b7e\uff08label\uff09\uff0c\u5e76\u4f7f\u7528after()<\/code>\u65b9\u6cd5\u57285\u79d2\u540e\u66f4\u65b0\u8be5\u6807\u7b7e\u7684\u6587\u672c\u5185\u5bb9\u3002<\/p>\n<\/p>\n
\u4e8c\u3001RECURRING EVENTS WITH AFTER()<\/h3>\n<\/p>\n
\u53e6\u4e00\u4e2a\u5f3a\u5927\u7684\u7528\u6cd5\u662f\u91cd\u590d\u6267\u884c\u4e00\u4e2a\u4efb\u52a1\uff0c\u53ef\u4ee5\u901a\u8fc7\u5728\u4efb\u52a1\u51fd\u6570\u7684\u672b\u5c3e\u518d\u6b21\u8c03\u7528after()<\/code>\u65b9\u6cd5\u5b9e\u73b0\u3002<\/p>\n<\/p>\n
\u91cd\u590d\u6267\u884c\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/strong><\/p>\n<\/p>\n
def recurring_task():<\/p>\n
    # \u8fd9\u91cc\u6267\u884c\u4f60\u7684\u4ee3\u7801<\/p>\n
    # ...<\/p>\n
    # \u5b8c\u6210\u540e\uff0c\u518d\u6b21\u8c03\u7528after()\u4ee5\u91cd\u590d\u6267\u884c\u4efb\u52a1<\/p>\n
    root.after(1000, recurring_task)<\/p>\n
\u8c03\u7528\u9996\u6b21\u6267\u884c\u7684\u51fd\u6570<\/strong><\/h2>\n
root.after(1000, recurring_task)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u901a\u8fc7\u9012\u5f52\u5730\u8c03\u7528after()<\/code>\u65b9\u6cd5\uff0c\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u6bcf\u9694\u4e00\u5b9a\u65f6\u95f4\u91cd\u590d\u6267\u884c\u7684\u4efb\u52a1\u3002<\/p>\n<\/p>\n
\u4e09\u3001USING LAMBDA FUNCTIONS<\/h3>\n<\/p>\n
\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u9700\u8981\u4f20\u9012\u53c2\u6570\u7ed9after()<\/code>\u65b9\u6cd5\u8c03\u7528\u7684\u51fd\u6570\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528lambda\u51fd\u6570\u6216\u8005partial\u51fd\u6570\u4ecefunctools\u6a21\u5757\u6765\u5b9e\u73b0<\/strong>\u3002<\/p>\n<\/p>\n
\u4f7f\u7528lambda\u51fd\u6570\u7684\u793a\u4f8b\uff1a<\/strong><\/p>\n<\/p>\n
def task_with_args(msg):<\/p>\n
    label.config(text=msg)<\/p>\n
root.after(5000, lambda: task_with_args("\u4f7f\u7528lambda\u4f20\u9012\u53c2\u6570"))<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cafter()<\/code>\u65b9\u6cd5\u8c03\u7528\u4e86\u4e00\u4e2alambda\u8868\u8fbe\u5f0f\uff0c\u8be5\u8868\u8fbe\u5f0f\u8c03\u7528\u4e86\u4e00\u4e2a\u63a5\u6536\u53c2\u6570\u7684\u51fd\u6570\u3002<\/p>\n<\/p>\n
\u56db\u3001CANCELLING SCHEDULED TASKS<\/h3>\n<\/p>\n
\u6709\u65f6\uff0c\u53ef\u80fd\u9700\u8981\u53d6\u6d88\u5df2\u7ecf\u5b89\u6392\u597d\u7684\u4efb\u52a1\u3002after()<\/code>\u65b9\u6cd5\u8c03\u7528\u65f6\u4f1a\u8fd4\u56de\u4e00\u4e2a\u552f\u4e00\u7684\u6807\u8bc6\u7b26\uff0c\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e2a\u6807\u8bc6\u7b26\u6765\u53d6\u6d88\u4efb\u52a1\u3002<\/p>\n<\/p>\n
\u53d6\u6d88\u5b89\u6392\u4efb\u52a1\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/strong><\/p>\n<\/p>\n
def task():<\/p>\n
    print("\u8fd9\u4e2a\u4efb\u52a1\u4e0d\u4f1a\u88ab\u6267\u884c")<\/p>\n
\u5b89\u6392\u4efb\u52a1<\/strong><\/h2>\n
id = root.after(10000, task)<\/p>\n
\u7136\u540e\u53d6\u6d88\u4efb\u52a1<\/strong><\/h2>\n
root.after_cancel(id)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5982\u679c\u4f60\u5728\u4efb\u52a1\u5b9e\u9645\u6267\u884c\u524d\u8c03\u7528after_cancel()<\/code>\uff0c\u90a3\u4e48\u5df2\u5b89\u6392\u7684\u4efb\u52a1\u5c06\u4e0d\u4f1a\u88ab\u6267\u884c\u3002<\/p>\n<\/p>\n
\u4e94\u3001ADVANCED USAGE AND CONSIDERATIONS<\/h3>\n<\/p>\n
after()<\/code>\u65b9\u6cd5\u76f8\u5bf9\u7b80\u5355\u4f46\u5374\u975e\u5e38\u5f3a\u5927\u3002\u5728\u5f00\u53d1\u5b9e\u9645\u7684\u5e94\u7528\u7a0b\u5e8f\u65f6\uff0c\u91cd\u8981\u7684\u662f\u8981\u6ce8\u610f\u7ba1\u7406\u597d\u8fd9\u4e9b\u5b9a\u65f6\u4efb\u52a1\uff0c\u9632\u6b62\u5185\u5b58\u6cc4\u6f0f\uff0c\u7279\u522b\u662f\u5728\u521b\u5efa\u5927\u91cf\u91cd\u590d\u7684\u5b9a\u65f6\u4efb\u52a1\u65f6\u3002\u6b64\u5916\uff0c\u5982\u679c\u7a0b\u5e8f\u5df2\u5173\u95ed\uff0c\u4f46\u662f\u5b9a\u65f6\u4efb\u52a1\u6ca1\u6709\u53d6\u6d88\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u7a0b\u5e8f\u5c1d\u8bd5\u8c03\u7528\u4e0d\u5b58\u5728\u7684\u65b9\u6cd5\u7684\u60c5\u51b5\uff0c\u4ece\u800c\u5bfc\u81f4\u9519\u8bef\u3002<\/p>\n<\/p>\n
\u603b\u7ed3\u8d77\u6765\uff0cTkinter\u7684after()<\/code>\u65b9\u6cd5\u662f\u5b9e\u73b0\u65f6\u95f4\u9a71\u52a8\u7684\u7f16\u7a0b\u7684\u91cd\u8981\u5de5\u5177<\/strong>\u3002\u65e0\u8bba\u662f\u5728\u5236\u4f5c\u52a8\u753b\u3001\u66f4\u65b0UI\uff0c\u8fd8\u662f\u8fdb\u884c\u5176\u4ed6\u5b9a\u65f6\u64cd\u4f5c\u65f6\uff0cafter()<\/code>\u90fd\u63d0\u4f9b\u4e86\u7b80\u5355\u548c\u7075\u6d3b\u7684\u63a5\u53e3\uff0c\u53ea\u8981\u9002\u5f53\u5730\u7ba1\u7406\u597d\uff0c\u5b83\u5c06\u662fTkinter\u7a0b\u5e8f\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. \u5982\u4f55\u7406\u89e3 tkinter.after() \u65b9\u6cd5\u7684\u5de5\u4f5c\u539f\u7406\uff1f<\/strong>
\ntkinter.after() \u65b9\u6cd5\u662f\u4e00\u4e2a\u7528\u4e8e\u5b9a\u65f6\u6267\u884c\u64cd\u4f5c\u7684\u65b9\u6cd5\u3002\u5f53\u8c03\u7528\u8be5\u65b9\u6cd5\u65f6\uff0c\u9700\u8981\u4f20\u9012\u4e24\u4e2a\u53c2\u6570\uff1a\u5ef6\u8fdf\u65f6\u95f4\uff08\u5355\u4f4d\u4e3a\u6beb\u79d2\uff09\u548c\u8981\u6267\u884c\u7684\u51fd\u6570\u3002tkinter.after() \u65b9\u6cd5\u4f1a\u5728\u6307\u5b9a\u7684\u5ef6\u8fdf\u65f6\u95f4\u540e\u8c03\u7528\u4f20\u9012\u7684\u51fd\u6570\u3002<\/p>\n
2. tkinter.after() \u65b9\u6cd5\u5982\u4f55\u5e2e\u52a9\u5b9e\u73b0\u5b9a\u65f6\u4efb\u52a1\uff1f<\/strong>
\n\u4f7f\u7528 tkinter.after() \u65b9\u6cd5\uff0c\u60a8\u53ef\u4ee5\u7f16\u5199\u4ee3\u7801\uff0c\u5728\u6307\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u5185\u5faa\u73af\u6267\u884c\u7279\u5b9a\u7684\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 tkinter.after() \u65b9\u6cd5\u5728 tkinter \u7a0b\u5e8f\u4e2d\u521b\u5efa\u4e00\u4e2a\u6587\u672c\u6846\uff0c\u5e76\u4e14\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\u66f4\u65b0\u6587\u672c\u6846\u4e2d\u7684\u6570\u636e\u3002<\/p>\n
3. \u5982\u4f55\u5728 tkinter \u7a0b\u5e8f\u4e2d\u6b63\u786e\u4f7f\u7528 tkinter.after() \u65b9\u6cd5\uff1f<\/strong>
\n\u9996\u5148\uff0c\u60a8\u9700\u8981\u786e\u5b9a\u5ef6\u8fdf\u65f6\u95f4\u7684\u8bbe\u5b9a\u3002\u60a8\u53ef\u4ee5\u6839\u636e\u9700\u8981\u7684\u6267\u884c\u9891\u7387\u9009\u62e9\u5408\u9002\u7684\u5ef6\u8fdf\u65f6\u95f4\u3002\u7136\u540e\uff0c\u60a8\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u51fd\u6570\uff0c\u8fd9\u4e2a\u51fd\u6570\u5c06\u5728\u5ef6\u8fdf\u65f6\u95f4\u4e4b\u540e\u6267\u884c\u3002\u6700\u540e\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 tkinter.after() \u65b9\u6cd5\uff0c\u5c06\u5ef6\u8fdf\u65f6\u95f4\u548c\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u5b83\u3002\u8fd9\u6837\uff0c\u60a8\u5c31\u53ef\u4ee5\u5b9e\u73b0\u5b9a\u65f6\u6267\u884c\u7279\u5b9a\u64cd\u4f5c\u7684\u529f\u80fd\u5566\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"Tkinter\u7684after()\u65b9\u6cd5\u662f\u4e00\u79cd\u8c03\u5ea6\u5668\uff0c\u7528\u4e8e\u5728\u6307\u5b9a\u7684\u6beb\u79d2\u6570\u540e\u8c03\u7528\u4e00\u4e2a\u51fd\u6570\u6216\u8005\u4e00\u4e2aTkinter\u4e8b\u4ef6\u3001\u5b9e […]","protected":false},"author":3,"featured_media":301835,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/301815"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=301815"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/301815\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/301835"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=301815"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=301815"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=301815"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}