我使用 cocos2d 2.0 和 Xcode 4.5。我正在努力学习如何画线。我可以画一条线，但在我画了几条线之后，模拟器上出现了严重的性能问题。
模拟器开始冻结，画线非常缓慢，最糟糕的是，我猜是因为-(void)draw每一帧都被调用，屏幕上的标签变粗
行前：
行后；
我使用以下代码：.m
-(id) init
{
if( (self=[super init])) {
CCLabelTTF *label = [CCLabelTTF labelWithString:@"Simple Line Demo" fontName:@"Marker Felt" fontSize:32];
label.position = ccp( 240, 300 );
[self addChild: label];
_naughtytoucharray =[[NSMutableArray alloc ] init];
self.isTouchEnabled = YES;
}
return self;
}
-(BOOL) ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event
{
BOOL isTouching;
// determine if it's a touch you want, then return the result
return isTouching;
}
-(void) ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [ touches anyObject];
CGPoint new_location = [touch locationInView: [touch view]];
new_location = [[CCDirector sharedDirector] convertToGL:new_location];
CGPoint oldTouchLocation = [touch previousLocationInView:touch.view];
oldTouchLocation = [[CCDirector sharedDirector] convertToGL:oldTouchLocation];
oldTouchLocation = [self convertToNodeSpace:oldTouchLocation];
// add my touches to the naughty touch array
[_naughtytoucharray addObject:NSStringFromCGPoint(new_location)];
[_naughtytoucharray addObject:NSStringFromCGPoint(oldTouchLocation)];
}
-(void)draw
{
[super draw];
ccDrawColor4F(1.0f, 0.0f, 0.0f, 100.0f);
for(int i = 0; i < [_naughtytoucharray count]; i+=2)
{
CGPoint start = CGPointFromString([_naughtytoucharray objectAtIndex:i]);
CGPoint end = CGPointFromString([_naughtytoucharray objectAtIndex:i+1]);
ccDrawLine(start, end);
}
}
- (void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
ManageTraffic *line = [ManageTraffic node];
[self addChild: line z:99 tag:999];
}
我看过一些空中交通管制游戏，例如飞行控制，ATC Mania效果非常好。
出现此性能问题是因为CCDrawLine/UITouch *touch还是常见问题？什么飞行控制，ATC Mania可能用于画线？
提前致谢。
编辑：：：：
好的我猜问题不是ccDrawLine，问题是我ManageTraffic *line = [ManageTraffic node];每次触摸结束它调用init节点时都会调用它所以它会覆盖场景
- (void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
ManageTraffic *line = [ManageTraffic node];
[self addChild: line z:99 tag:999];
}