进度条使用精灵图形来显示进度:随着时间的过去逐渐显示出精灵的全部,来表示游戏的进度。
CCProgressTimer* timer = [CCProgressTimer progressWithFile:@"firething.png"]; timer.type = kCCProgressTimerTypeRadialCCW; timer.percentage = 0; [self addChild:timer z:1 tag:UILayerTagProgressTimer]; // 进度条需要预约的更新方法来更新自身的状态 [self scheduleUpdate]; -(void) update:(ccTime)delta { CCNode* node = [self getChildByTag:UILayerTagProgressTimer]; NSAssert([node isKindOfClass:[CCProgressTimer class]], @"node is not a CCProgressTimer"); // 更新进度条的时间显示 CCProgressTimer* timer = (CCProgressTimer*)node; timer.percentage += delta * 10; if (timer.percentage >= 100) { timer.percentage = 0; } }