当应用程序在前台运行时,若 iOS 或 Android 设备通知内存不足,则会发生此事件。您可以从内存中释放非关键资源(例如,纹理或音频剪辑)以应对此情况,从而避免应用程序终止。您还可以加载此类资源的较小版本。此外,您应该将任何瞬态数据序列化为永久存储,以避免在应用程序终止时丢失数据。
此事件对应于不同平台上的以下回调:
- iOS:[UIApplicationDelegate applicationDidReceiveMemoryWarning]
- Android:onLowMemory() 和 onTrimMemory(level == TRIM_MEMORY_RUNNING_CRITICAL)
以下是处理回调的示例:
using UnityEngine; using System.Collections; using System.Collections.Generic;
class LowMemoryTrigger : MonoBehaviour { List<Texture2D> _textures;
private void Start() { _textures = new List<Texture2D>(); Application.lowMemory += OnLowMemory; }
private void Update() { // allocate textures until we run out of memory _textures.Add(new Texture2D(256, 256)); }
private void OnLowMemory() { // release all cached textures _textures = new List<Texture2D>(); Resources.UnloadUnusedAssets(); } }
Did you find this page useful? Please give it a rating:
Thanks for rating this page!
What kind of problem would you like to report?
Thanks for letting us know! This page has been marked for review based on your feedback.
If you have time, you can provide more information to help us fix the problem faster.
Provide more information
You've told us this page needs code samples. If you'd like to help us further, you could provide a code sample, or tell us about what kind of code sample you'd like to see:
You've told us there are code samples on this page which don't work. If you know how to fix it, or have something better we could use instead, please let us know:
You've told us there is information missing from this page. Please tell us more about what's missing:
You've told us there is incorrect information on this page. If you know what we should change to make it correct, please tell us:
You've told us this page has unclear or confusing information. Please tell us more about what you found unclear or confusing, or let us know how we could make it clearer:
You've told us there is a spelling or grammar error on this page. Please tell us what's wrong:
You've told us this page has a problem. Please tell us more about what's wrong:
Thank you for helping to make the Unity documentation better!
Your feedback has been submitted as a ticket for our documentation team to review.
We are not able to reply to every ticket submitted.