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106 lines
3.5 KiB
ReStructuredText
106 lines
3.5 KiB
ReStructuredText
:github_url: hide
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.. _class_SceneTreeTimer:
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SceneTreeTimer
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==============
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**继承：** :ref:`RefCounted<class_RefCounted>` **<** :ref:`Object<class_Object>`
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一次性定时器。
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.. rst-class:: classref-introduction-group
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描述
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----
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由场景树管理的一次性计时器，会在完成时发出 :ref:`timeout<class_SceneTreeTimer_signal_timeout>`\ 。另见 :ref:`SceneTree.create_timer()<class_SceneTree_method_create_timer>`\ 。
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与 :ref:`Timer<class_Timer>` 不同，它不需要实例化节点。常用于创建一次性的延迟计时器，如下面的例子所示：
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.. tabs::
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.. code-tab:: gdscript
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func some_function():
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print("计时开始。")
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await get_tree().create_timer(1.0).timeout
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print("计时结束。")
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.. code-tab:: csharp
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public async Task SomeFunction()
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{
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GD.Print("计时开始。");
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await ToSignal(GetTree().CreateTimer(1.0f), SceneTreeTimer.SignalName.Timeout);
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GD.Print("计时结束。");
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}
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达到时间后，会释放对该计时器的引用。如果要保留该计时器，你可以保持对它的引用。见 :ref:`RefCounted<class_RefCounted>`\ 。
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\ **注意：**\ 对计时器的处理发生在当前帧的所有节点节后，即节点的 :ref:`Node._process()<class_Node_private_method__process>` 方法是在计时器之前调用的（如果 :ref:`SceneTree.create_timer()<class_SceneTree_method_create_timer>` 的 ``process_in_physics`` 为 ``true``\ 则为 :ref:`Node._physics_process()<class_Node_private_method__physics_process>`\ ）。
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.. rst-class:: classref-reftable-group
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属性
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----
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.. table::
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:widths: auto
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+---------------------------+-----------------------------------------------------------+
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| :ref:`float<class_float>` | :ref:`time_left<class_SceneTreeTimer_property_time_left>` |
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+---------------------------+-----------------------------------------------------------+
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.. rst-class:: classref-section-separator
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----
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.. rst-class:: classref-descriptions-group
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信号
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----
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.. _class_SceneTreeTimer_signal_timeout:
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.. rst-class:: classref-signal
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**timeout**\ (\ ) :ref:`🔗<class_SceneTreeTimer_signal_timeout>`
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当计时器到 0 时发出。
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.. rst-class:: classref-section-separator
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----
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.. rst-class:: classref-descriptions-group
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属性说明
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--------
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.. _class_SceneTreeTimer_property_time_left:
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.. rst-class:: classref-property
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:ref:`float<class_float>` **time_left** :ref:`🔗<class_SceneTreeTimer_property_time_left>`
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.. rst-class:: classref-property-setget
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- |void| **set_time_left**\ (\ value\: :ref:`float<class_float>`\ )
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- :ref:`float<class_float>` **get_time_left**\ (\ )
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剩余时间（单位为秒）。
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.. |virtual| replace:: :abbr:`virtual (本方法通常需要用户覆盖才能生效。)`
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.. |required| replace:: :abbr:`required (This method is required to be overridden when extending its base class.)`
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.. |const| replace:: :abbr:`const (本方法无副作用，不会修改该实例的任何成员变量。)`
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.. |vararg| replace:: :abbr:`vararg (本方法除了能接受在此处描述的参数外，还能够继续接受任意数量的参数。)`
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.. |constructor| replace:: :abbr:`constructor (本方法用于构造某个类型。)`
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.. |static| replace:: :abbr:`static (调用本方法无需实例，可直接使用类名进行调用。)`
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.. |operator| replace:: :abbr:`operator (本方法描述的是使用本类型作为左操作数的有效运算符。)`
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.. |bitfield| replace:: :abbr:`BitField (这个值是由下列位标志构成位掩码的整数。)`
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.. |void| replace:: :abbr:`void (无返回值。)`
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