源码下载地址：
http://code.google.com/p/cocos2d-iphone/downloads/list
https://github.com/cocos2d/cocos2d-iphone-classic/releases?after=release-0.2
问题：[[CCDirector sharedDirector] runWithScene: [sysMenu scene]];导演是怎么把screen放到屏幕上的呢？
找了老半天发现只有这个- (void) pushScene: (CCScene*) scene，把这个注了，就显示不了了，
后来又找了很长时间终于找到了，
EAGLView里
- (void) layoutSubviews
[director performSelectorOnMainThread:@selector(drawScene) withObject:nil waitUntilDone:YES];
-(void) mainLoop
{
[self drawScene];
}
- (void) startAnimation
{
NSAssert( isRunning == NO, @"isRunning must be NO. Calling startAnimation twice?");
// XXX:
// XXX: release autorelease objects created
// XXX: between "use fast director" and "runWithScene"
// XXX:
[autoreleasePool release];
autoreleasePool = nil;
if ( gettimeofday( &lastUpdate_, NULL) != 0 ) {
CCLOG(@"cocos2d: Director: Error in gettimeofday");
}
isRunning = YES;
SEL selector = @selector(mainLoop);
NSMethodSignature* sig = [[[CCDirector sharedDirector] class]
instanceMethodSignatureForSelector:selector];
NSInvocation* invocation = [NSInvocation
invocationWithMethodSignature:sig];
[invocation setTarget:[CCDirector sharedDirector]];
[invocation setSelector:selector];
[invocation performSelectorOnMainThread:@selector(invokeWithTarget:)
withObject:[CCDirector sharedDirector] waitUntilDone:NO];
// NSInvocationOperation *loopOperation = [[[NSInvocationOperation alloc]
// initWithTarget:self selector:@selector(mainLoop) object:nil]
// autorelease];
//
// [loopOperation performSelectorOnMainThread:@selector(start) withObject:nil
// waitUntilDone:NO];
}
- (void) startAnimation
{
NSAssert( displayLink == nil, @"displayLink must be nil. Calling startAnimation twice?");
if ( gettimeofday( &lastUpdate_, NULL) != 0 ) {
CCLOG(@"cocos2d: DisplayLinkDirector: Error on gettimeofday");
}
// approximate frame rate
// assumes device refreshes at 60 fps
int frameInterval = (int) floor(animationInterval_ * 60.0f);
CCLOG(@"cocos2d: Frame interval: %d", frameInterval);
displayLink = [NSClassFromString(@"CADisplayLink") displayLinkWithTarget:self selector:@selector(mainLoop:)];
[displayLink setFrameInterval:frameInterval];
[displayLink addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
}