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XCSDD/docs/api/core/event/begin.md
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Event::begin

Iterator begin();

获取开始迭代器。

描述

返回订阅列表的开始迭代器用于范围for循环遍历所有订阅的回调。

返回: Iterator - 指向第一个监听器的迭代器(等价于 std::vector<Listener>::iterator

复杂度: O(1)

示例:

#include <XCEngine/Core/Event.h>

using namespace XCEngine::Core;

Event<int> event;
event.Subscribe([](int v) { printf("Callback 1: %d\n", v); });
event.Subscribe([](int v) { printf("Callback 2: %d\n", v); });

// 遍历所有订阅
for (auto& [id, callback] : event) {
    callback(100);
}

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