====== 监听事件 ======
在本教程中，你会学到：
  - 理解事件和回调
  - 对已有的事件注册回调

===== 事件 =====
事件是用存储并调用回调的 ''net.fabricmc.fabric.api.event.Event'' 的实例代表的，通常回调有单个事件实例，存储在回调接口的 ''EVENT'' 静态字段中，但也有其他的形式。例如，[[https://github.com/FabricMC/fabric/blob/1.17/fabric-lifecycle-events-v1/src/main/java/net/fabricmc/fabric/api/client/event/lifecycle/v1/ClientTickEvents.java|ClientTickEvents]] 将几个有关的事件分组在一起。
===== 回调 =====
每个事件都有对应的回调接口，通常命名为 ''EventNameCallback''。回调是通过在事件接口调用 ''register()'' 来注册的，调用时需要一个回调接口实例作为参数。
==== Fabric API 中的回调接口 ====
Fabric API 提供的所有事件回调接口可以在 ''net.fabricmc.fabric.api.event'' 包中找到。本教程底部提供了部分存在的回调的列表。

==== 自定义回调 ====
虽然 Fabric API 已经提供了许多事件，你还是可以制作你自己的事件，请参考[[zh_cn:tutorial:events]]。

===== 实例 ======
此例注册一个 ''AttackBlockCallback''，玩家击打不能徒手挖掘掉落的方块时，会受到伤害。会返回 ''<yarn class_1269.field_5811>'' 因为还需要调用其他的回调。关于其他值的含义，请参考你的 IDE 中 [[https://github.com/FabricMC/fabric/blob/12865e786ce2102d344304a679b70084be84d166/fabric-events-interaction-v0/src/main/java/net/fabricmc/fabric/api/event/player/AttackBlockCallback.java#L29-L39|AttackBlockCallback]] 的 JavaDoc。
<yarncode java [enable_line_numbers="true"]>
public class ExampleMod implements ModInitializer {
    [...]
    
    @Override
    public void onInitialize() {
        AttackBlockCallback.EVENT.register((player, world, hand, pos, direction) -> {
            class_2680 state = world.method_8320(pos);
            /* 手动的旁观者检查是必要的，因为 AttackBlockCallbacks 会在旁观者检查之前应用 */
            if (state.method_29291() && !player.method_7325() && 
                player.method_6047().method_7960()) {
                player.method_5643(class_1282.field_5869, 1.0F);
            } 
            return class_1269.field_5811;
        });
    }
}
</yarncode>

===== Fabric API 事件 ======
=== 玩家交互事件 ===
玩家：[[https://github.com/FabricMC/fabric/blob/1.15/fabric-events-interaction-v0/src/main/java/net/fabricmc/fabric/api/event/player/AttackBlockCallback.java|AttackBlockCallback]] / [[https://github.com/FabricMC/fabric/blob/1.15/fabric-events-interaction-v0/src/main/java/net/fabricmc/fabric/api/event/player/AttackEntityCallback.java|AttackEntityCallback]] / [[https://github.com/FabricMC/fabric/blob/1.15/fabric-events-interaction-v0/src/main/java/net/fabricmc/fabric/api/event/player/UseBlockCallback.java|UseBlockCallback]] / [[https://github.com/FabricMC/fabric/blob/1.15/fabric-events-interaction-v0/src/main/java/net/fabricmc/fabric/api/event/player/UseEntityCallback.java|UseEntityCallback]] / [[https://github.com/FabricMC/fabric/blob/1.15/fabric-events-interaction-v0/src/main/java/net/fabricmc/fabric/api/event/player/UseItemCallback.java|UseItemCallback]]

玩家（客户端）：[[https://github.com/FabricMC/fabric/blob/1.15/fabric-events-interaction-v0/src/main/java/net/fabricmc/fabric/api/event/client/player/ClientPickBlockApplyCallback.java|ClientPickBlockApplyCallback]] / [[https://github.com/FabricMC/fabric/blob/1.15/fabric-events-interaction-v0/src/main/java/net/fabricmc/fabric/api/event/client/player/ClientPickBlockCallback.java|ClientPickBlockCallback]] / [[https://github.com/FabricMC/fabric/blob/1.15/fabric-events-interaction-v0/src/main/java/net/fabricmc/fabric/api/event/client/player/ClientPickBlockGatherCallback.java|ClientPickBlockGatherCallback]]

=== 注册表事件 ===
[[https://github.com/FabricMC/fabric/blob/1.15/fabric-object-builders-v0/src/main/java/net/fabricmc/fabric/api/event/registry/BlockConstructedCallback.java|BlockConstructedCallback]] / [[https://github.com/FabricMC/fabric/blob/1.15/fabric-object-builders-v0/src/main/java/net/fabricmc/fabric/api/event/registry/ItemConstructedCallback.java|ItemConstructedCallback]]

[[https://github.com/FabricMC/fabric/blob/1.15/fabric-registry-sync-v0/src/main/java/net/fabricmc/fabric/api/event/registry/RegistryEntryAddedCallback.java|RegistryEntryAddedCallback]] / [[https://github.com/FabricMC/fabric/blob/1.15/fabric-registry-sync-v0/src/main/java/net/fabricmc/fabric/api/event/registry/RegistryEntryRemovedCallback.java|RegistryEntryRemovedCallback]] / [[https://github.com/FabricMC/fabric/blob/1.15/fabric-registry-sync-v0/src/main/java/net/fabricmc/fabric/api/event/registry/RegistryIdRemapCallback.java|RegistryIdRemapCallback]]

=== 战利品事件 ===
[[https://github.com/FabricMC/fabric/blob/1.15/fabric-loot-tables-v1/src/main/java/net/fabricmc/fabric/api/loot/v1/event/LootTableLoadingCallback.java|LootTableLoadingCallback]]

关于使用 ''LootTableLoadingCallback'' 的例子，请参考[[zh_cn:tutorial:adding_to_loot_tables|此教程]]。

=== 世界事件 ===
[[https://github.com/FabricMC/fabric/blob/1.15/fabric-events-lifecycle-v0/src/main/java/net/fabricmc/fabric/api/event/world/WorldTickCallback.java|WorldTickCallback]]

=== 服务器事件 ===
[[https://github.com/FabricMC/fabric/blob/1.15/fabric-events-lifecycle-v0/src/main/java/net/fabricmc/fabric/api/event/server/ServerStartCallback.java|ServerStartCallback]] / [[https://github.com/FabricMC/fabric/blob/1.15/fabric-events-lifecycle-v0/src/main/java/net/fabricmc/fabric/api/event/server/ServerStopCallback.java|ServerStopCallback]] / [[https://github.com/FabricMC/fabric/blob/1.15/fabric-events-lifecycle-v0/src/main/java/net/fabricmc/fabric/api/event/server/ServerTickCallback.java|ServerTickCallback]]

=== 网络事件 ===
[[https://github.com/FabricMC/fabric/blob/1.15/fabric-networking-v0/src/main/java/net/fabricmc/fabric/api/event/network/C2SPacketTypeCallback.java|C2SPacketTypeCallback]] / [[https://github.com/FabricMC/fabric/blob/1.15/fabric-networking-v0/src/main/java/net/fabricmc/fabric/api/event/network/S2CPacketTypeCallback.java|S2CPacketTypeCallback]]