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--- zh_cn:tutorial:mixin_examples [2021/11/20 12:53] – external edit 127.0.0.1
+++ zh_cn:tutorial:mixin_examples [2023/12/18 02:10] – [使用偏移注入到一个方法调用之前] solidblock
@@ Line 1: / Line 1: @@
 ====== Mixin 示例 ======
-收录了较为常见的 Mixin 示例.
+收录了较为常见的 Mixin 示例。此页面旨在帮助开发者快速学习 Mixin 的使用，建议在开始之前先查看 [[zh_cn:tutorial:mixin_introduction|Mixin介绍]]。
+===== 注入到内部私有类的一个方法 =====
+使用 targets 参数并添加 ''$'' 符号来指向内部类。
+<code java>
+@Mixin(targets = "net.minecraft.client.render.block.BlockModelRenderer$AmbientOcclusionCalculator")
+public class AmbientOcclusionCalculatorMixin {
+    // 为所欲为 ^ v ^
+}
+</code>
+===== 在 Mixin 类中获取目标类实例对象 =====
+注意：应该避免像这样两次强转 ''this''。如果你是要使用来自目标来的方法或字段，使用 ''@Shadow''。如果方法或字段是来自目标类的父类，可以直接将你的这个 mixin 继承那个父类。
+Mixin:
+<code java>
+@Mixin(TargetClass.class)
+public class MyMixin extends EveryThingThatTargetClassExtends implements EverythingThatTargetClassImplements {
+  @Inject(method = "foo()V", at = @At("HEAD"))
+  private void injected(CallbackInfo ci) {
+    TargetClass thisObject = (TargetClass)(Object)this;
+  }
+}
+</code>
+===== 注入到静态初始化代码块的开头 =====
+Mixin:
+<code java>
+@Inject(method = "<clinit>", at = @At("HEAD"))
+private void injected(CallbackInfo ci) {
+    doSomething3();
+}
+</code>
+结果:
+<code diff>
+static {
++   injected(new CallbackInfo(“<clinit>”, false));
+    doSomething1();
+    doSomething2();
+}
+</code>
 ===== 注入在一个方法的开头 =====
@@ Line 101: / Line 140: @@
 +   injected(new CallbackInfo("foo", false));
     doSomething2();
+  }
+</code>
+===== 使用偏移量注入 =====
+Mixin:
+<code java>
+@Inject(method = "foo()V", at = @At(value = "INVOKE", target = "La/b/c/Something;doSomething()V", shift = At.Shift.BY, by = 2))
+private void injected(CallbackInfo ci) {
+  doSomething3();
+}
+</code>
+结果:
+<code diff>
+  public void foo() {
+    doSomething1();
+    Something something = new Something();
+    something.doSomething();
+    doSomething2();
++   injected(new CallbackInfo("foo", false));
   }
 </code>
@@ Line 181: / Line 240: @@
     doSomething3();
     return 10;
+  }
+</code>
+===== 捕获局部变量 =====
+Mixin:
+<code java>
+@Inject(method = "foo()V", at = @At(value = "TAIL"), locals = LocalCapture.CAPTURE_FAILHARD)
+private void injected(CallbackInfo ci, TypeArg1 arg1) {
+  //CAPTURE_FAILHARD: 如果计算局部变量与预期不符则抛出一个异常。
+  arg1.doSomething4();
+}
+</code>
+结果:
+<code diff>
+  public void foo() {
+    TypeArg1 arg1 = getArg1();
+    arg1.doSomething1();
+    arg1.doSomething2();
+    TypeArg2 arg2 = getArg2();
+    arg2.doSomething3();
++   injected(new CallbackInfo("foo", false), arg1);
   }
 </code>