| nanoseconds | 在垃圾收集中花费的最大纳秒数。 |
bool 如果在方法返回时有其他垃圾收集工作仍在进行，则返回 true；如果垃圾收集已完成，则返回 false。如果增量垃圾收集未启用或是在当前平台上不受支持，也返回 false。
在 nanoseconds 参数指定的持续时间内执行增量垃圾收集。
如果增量垃圾收集已启用，则 CollectIncremental() 会运行增量垃圾收集，最多达到指定数量的纳秒。当经过了指定时间量，或是没有更多垃圾收集工作要进行时，方法会返回。请注意，垃圾回收器使用底层平台计时器，其分辨率可能会低至数微秒。换句话说，将值更改数纳秒可能会没有效果。
当知道需要特定时间量来等待某个事件发生，并且要使用此时间让垃圾回收器运行时，可使用此方法。
如果增量垃圾收集未启用，则此方法不执行任何操作并返回 false（IsIncremental 属性必须为 true 才能使用此方法）。
在 PlayerSettings 中为项目启用增量垃圾收集。可以使用 IsIncremental 检查是否启用了增量垃圾收集。
另请参阅：incrementalTimeSliceNanoseconds。
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