Objective C 显示图像数组
所以我正在创建一个应该有动态生成的珊瑚礁的游戏。珊瑚礁有几个包含我尝试显示的图像 (100x100) 的对象。我可以显示图像，但 CPU 使用率很高。我相信问题出在我的绘图代码中：
-(void)drawCoralWithContext:(CGContextRef)ctx{
for(Coral *c in coral){
CGRect coralRect = CGRectMake (0, 0, [c size], [c size]);
CGLayerRef layerRef = CGLayerCreateWithContext(ctx, CGSizeMake([c size], [c size]), NULL);
CGContextRef layerCtx = CGLayerGetContext(layerRef);
coralRect = CGRectMake (0, 0, [c size], [c size]);
layerRef = CGLayerCreateWithContext(ctx, CGSizeMake([c size], [c size]), NULL);
layerCtx = CGLayerGetContext(layerRef);
CGContextDrawImage(layerCtx, coralRect, [c image]);
CGContextSaveGState(ctx);
CGContextTranslateCTM(ctx, c.position.x, c.position.y);
CGContextDrawLayerAtPoint(ctx, [c position], layerRef);
CGContextRestoreGState(ctx);
CFRelease(layerRef);
}
}
传入的上下文： CGContextRef ctx = UIGraphicsGetCurrentContext();
我需要减少处理量。非常感谢任何帮助，谢谢。
So I'm creating a game that is supposed to have a dynamically generated coral reef. The reef has several objects that contain images (100x100) that I am trying to display. I can display the images but with severe CPU usage. The problem lies in my drawing code I believe:
-(void)drawCoralWithContext:(CGContextRef)ctx{
for(Coral *c in coral){
CGRect coralRect = CGRectMake (0, 0, [c size], [c size]);
CGLayerRef layerRef = CGLayerCreateWithContext(ctx, CGSizeMake([c size], [c size]), NULL);
CGContextRef layerCtx = CGLayerGetContext(layerRef);
coralRect = CGRectMake (0, 0, [c size], [c size]);
layerRef = CGLayerCreateWithContext(ctx, CGSizeMake([c size], [c size]), NULL);
layerCtx = CGLayerGetContext(layerRef);
CGContextDrawImage(layerCtx, coralRect, [c image]);
CGContextSaveGState(ctx);
CGContextTranslateCTM(ctx, c.position.x, c.position.y);
CGContextDrawLayerAtPoint(ctx, [c position], layerRef);
CGContextRestoreGState(ctx);
CFRelease(layerRef);
}
}
The context being passed in:CGContextRef ctx = UIGraphicsGetCurrentContext();
I need to reduce the amount of processing. Any help is greatly appreciated, thanks.
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您看过 CATiledLayer 吗？它的文档不是很好，但是为绘制充满许多小图像的屏幕提供了很多性能改进。有一些来自旧 WWDC 的示例代码，您可能想查看本教程 http: //www.cimgf.com/2011/03/01/subduing-catiledlayer/
Have you looked at CATiledLayer? Its documentation is not very good but offers a lot of performance improvement for drawing a screen full of many small images. There's some sample code from old WWDC's and you might want to check out this tutorial http://www.cimgf.com/2011/03/01/subduing-catiledlayer/