找了些关于loading的资源，贴出来慢慢看。 (id) init {
       self = [super init]; if ( self )     {   // Add the Label (in cocos2D universe)         BitmapFontAtlas *label = [BitmapFontAtlas          bitmapFontAtlasWithString: @"Initializing Game"          fntFile: @"comic_atlas.fnt"          alignment: UITextAlignmentCenter];         label.position = ccp(240, 160);         label.opacity = 0;         [self addChild: label z: 0 tag: kInitializingLabel]; // Add the UIActivityIndicatorView (in UIKit universe)         self.activityIndicatorView = [[[UIActivityIndicatorView alloc]           initWithActivityIndicatorStyle:           UIActivityIndicatorViewStyleWhiteLarge] autorelease];         activityIndicatorView.center = ccp(190,240);         [activityIndicatorView startAnimating];         [[self battleView] addSubview: activityIndicatorView];         [self schedule: @selector(loadingInit)]; // At this point, the cocos2d rendering is fine.     } return self; } - (void) loadingInit {
       [self unschedule: @selector(loadingInit)]; // Fade in nicely     BitmapFontAtlas *label = (BitmapFontAtlas*)[self getChildByTag: kInitializingLabel];     [label runAction: [FadeIn actionWithDuration: .25]];     [self schedule: @selector(loadingStep0) interval: .25]; } - (void) loadingStep0 {
       [self unschedule: @selector(loadingStep0)]; // Add you own code to load texture, sounds etc... // The cocos2D thread will be waiting (since it's the same as        the main thread) but the UIKit thread will keep running in parallel // Can do multiple steps or just one     [self schedule: @selector(loadingStep1) interval: .5]; } - (void) loadingStep1 {
       [self unschedule: @selector(loadingStep1)]; // Add you own code to load texture, sounds etc...     [self schedule: @selector(loadingDone) interval: .1]; } - (void) loadingDone {
       gameIsReady = YES;     [self.activityIndicatorView removeFromSuperview];     BitmapFontAtlas *label = (BitmapFontAtlas*)[self getChildByTag: kInitializingLabel];     [label setString: NSLocalizedString(@"Tap to start!", nil)];     [label runAction: [RepeatForever actionWithAction:                        [Sequence actionOne: [EaseInOut actionWithAction:                        [MoveTo actionWithDuration: .6 position: ccp(210, 160)] rate: 2]                        two: [EaseInOut actionWithAction:                        [MoveTo actionWithDuration: .6 position: ccp(270, 160)] rate: 2]                         ]                              ]      ]; } - (BOOL)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
   if ( gameIsReady )     {
           [self openGame];     } return kEventHandled; } 2。 CGRect texRect = CGRectMake( (barPngWidth/2)*(1-loadPercentage), 0, barPngWidth/2, barPngHeight); [barAtlasSprite setTextureRect:textRect]; My loadPercentage var should be comprised between 0 and 1. You definitely don't have to use an animation nor the setDisplayFrame function. 3。http://stackoverflow.com/questions/1133123/multi-threaded-opengl-programming-in-cocos2d-iphone