Loading... 通过函数扩展的方式，调用时只要在原有函数后面加上对应方法即可。 ```dart import 'dart:async'; import 'dart:ui'; // Function extensions to add throttling and debouncing capabilities extension FunctionExtensions on Function { VoidCallback throttle() { return FunctionProxy(this).throttle; } VoidCallback throttleWithTimeout({int? timeout}) { return FunctionProxy(this, timeout: timeout).throttleWithTimeout; } VoidCallback debounce({int? timeout}) { return FunctionProxy(this, timeout: timeout).debounce; } } // FunctionProxy class to implement throttling and debouncing class FunctionProxy { static final Map<int, bool> _throttleMap = {}; static final Map<int, Timer> _debounceMap = {}; final Function target; final int timeout; FunctionProxy(this.target, {int? timeout}) : timeout = timeout ?? 500; // Throttle function to limit the execution rate void throttle() async { int key = target.hashCode; bool canExecute = _throttleMap[key] ?? true; if (canExecute) { _throttleMap[key] = false; try { await target(); } catch (e) { rethrow; } finally { _throttleMap.remove(key); } } } // Throttle function with a specified timeout void throttleWithTimeout() { int key = target.hashCode; bool canExecute = _throttleMap[key] ?? true; if (canExecute) { _throttleMap[key] = false; Timer(Duration(milliseconds: timeout), () { _throttleMap.remove(key); }); target(); } } // Debounce function to delay execution until after a specified period void debounce() { int key = target.hashCode; _debounceMap[key]?.cancel(); _debounceMap[key] = Timer(Duration(milliseconds: timeout), () { _debounceMap.remove(key); target(); }); } } ``` © 允许规范转载 打赏 赞赏作者 微信 赞
