2025年cocos creator 帧率60 不生效meta50 能刷新到90

科技前沿 • 2025-02-28 23:05 • 阅读 41

大家好，我是讯享网，很高兴认识大家。

环境：
cocos creator 2.4.3
华为meta 50

背景：
小游戏需要在update 里取帧率发现跟时间对不上
游戏设置60帧
手机上显示 90帧
cc.game.setFrameRate(30) 显示 30帧
cc.game.setFrameRate(60) 显示 90帧

结论：
对于老版本的cocos creator 如果有依赖帧率的逻辑
需要自行注意逻辑正确性
cc.game.getFrameRate() 取出来的帧率有可能并不是当前真实帧率只是逻辑帧率

源码分析：

 cocos2dxRenderer.java @Override public void onDrawFrame(final GL10 gl) { 
    if (mNeedToPause) return; if (mNeedShowFPS) { 
    / //IDEA: show FPS in Android Text control rather than outputing log. ++mFrameCount; long nowFpsTime = System.nanoTime(); long fpsTimeInterval = nowFpsTime - mOldNanoTime; if (fpsTimeInterval > L) { 
    double frameRate = .0 * mFrameCount / fpsTimeInterval; Cocos2dxHelper.OnGameInfoUpdatedListener listener = Cocos2dxHelper.getOnGameInfoUpdatedListener(); if (listener != null) { 
    listener.onFPSUpdated((float) frameRate); } mFrameCount = 0; mOldNanoTime = System.nanoTime(); } / } /* * No need to use algorithm in default(60 FPS) situation, * since onDrawFrame() was called by system 60 times per second by default. */ if (sAnimationInterval <= INTERVAL_60_FPS) { 
    Cocos2dxRenderer.nativeRender(); } else { 
    final long now = System.nanoTime(); final long interval = now - this.mLastTickInNanoSeconds; if (interval < Cocos2dxRenderer.sAnimationInterval) { 
    try { 
    Thread.sleep((Cocos2dxRenderer.sAnimationInterval - interval) / Cocos2dxRenderer.NANOSECONDSPERMICROSECOND); } catch (final Exception e) { 
    } } /* * Render time MUST be counted in, or the FPS will slower than appointed. */ this.mLastTickInNanoSeconds = System.nanoTime(); Cocos2dxRenderer.nativeRender(); } }

讯享网

分析上述代码

讯享网if (sAnimationInterval <= INTERVAL_60_FPS) { 
    Cocos2dxRenderer.nativeRender(); }

2025年cocos creator 帧率60 不生效meta50 能刷新到90

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