我在哪里泄漏此代码中的CGMutablePathRef？ [英] Where am I leaking CGMutablePathRef in this code?
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问题描述
在我的代码中，我有CGMutablePathRef thePath = CGPathCreateMutable（）;如果我不发布它，那么我确实会泄漏成千上万次泄漏，因为我不断地进行操作。但是，如果我释放它，我的游戏最终将崩溃。有任何想法吗？
In my code I have CGMutablePathRef thePath = CGPathCreateMutable(); If I don't release it I literally get thousands of leaks because I'm doing the action constantly. However, if I do release it, my game eventually crashes. Any ideas? Is it possible I'm releasing it in the wrong place?
-(void)MoveObject:(int)Tag
{
representationX = gameViewObj.spaceshipImageView.center.x;
representationY = gameViewObj.spaceshipImageView.center.y;
CALayer *spaceshipLayer = gameViewObj.spaceshipImageView.layer;
shipAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
CGMutablePathRef thePath = CGPathCreateMutable();
CGPathMoveToPoint(thePath, NULL, representationX, representationY);
statusFire = YES;
BOOL parsedF = NO;
其余代码如下：
-(void)MoveObject:(int)Tag
{
representationX = gameViewObj.spaceshipImageView.center.x;
representationY = gameViewObj.spaceshipImageView.center.y;
CALayer *spaceshipLayer = gameViewObj.spaceshipImageView.layer;
shipAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
CGMutablePathRef thePath = CGPathCreateMutable();
CGPathMoveToPoint(thePath, NULL, representationX, representationY);
statusFire = YES;
BOOL parsedF = NO;
if(Tag==LeftButtonTag)
{
gameViewObj.spaceshipImageView.transform = CGAffineTransformMakeRotation(M_PI + M_PI_2);
previousButtonTag = LeftButtonTag;
representationX--;
CGPathAddLineToPoint(thePath, NULL,representationX, representationY);
parsedF = YES;
}
else if(Tag==UpButtonTag)
{
gameViewObj.spaceshipImageView.transform = CGAffineTransformMakeRotation(0);
previousButtonTag = UpButtonTag;
representationY--;
CGPathAddLineToPoint(thePath, NULL,representationX, representationY);
parsedF = YES;
}
else if(Tag==RightButtonTag)
{
gameViewObj.spaceshipImageView.transform = CGAffineTransformMakeRotation(M_PI/2);
previousButtonTag = RightButtonTag;
representationX++;
CGPathAddLineToPoint(thePath, NULL,representationX, representationY);
parsedF = YES;
}
else if(Tag==DownButtonTag)
{
gameViewObj.spaceshipImageView.transform = CGAffineTransformMakeRotation(M_PI);
previousButtonTag = DownButtonTag;
representationY++;
CGPathAddLineToPoint(thePath, NULL,representationX, representationY);
parsedF = YES;
}
if(parsedF){
shipAnimation.path = thePath;
shipAnimation.delegate = self;
shipAnimation.duration = 0.003;
[spaceshipLayer addAnimation:shipAnimation forKey:@"position"];
//To kill spaceship when moved backwards.
if(playField[representationX][representationY]==3){
[self doDie];
}
if(playField[representationX][representationY] == 2){
if(onSecretLine){
[gameViewObj.spaceshipImageView setCenter:CGPointMake(representationX, representationY)];
oldPositionX = representationX;
oldPositionY = representationY;
}
}
// case: breaking out
if (playField[representationX][representationY]==0){
if (onSecretLine){
if (statusFire)
{
availableOffline = YES;
oldPositionX=gameViewObj.spaceshipImageView.center.x;
oldPositionY=gameViewObj.spaceshipImageView.center.y;
[gameViewObj DrawLine];
onSecretLine = NO;
availableOffline = NO;
}
}
}
if (playField[representationX][representationY]==0)
if (!onSecretLine)
{
BOOL doIt=true;
// ------------------------------
// prevent contact own line
// ------------------------------
// left
if (Tag==LeftButtonTag) {
if (playField[representationX-1][representationY]==3) {
[self doDie];
doIt=false;
}
}
// right
if (Tag==RightButtonTag) {
if (playField[representationX+1][representationY]==3) {
[self doDie];
doIt=false;
}
}
// up
if (Tag==UpButtonTag) {
if (playField[representationX][representationY-1]==3) {
[self doDie];
doIt=false;
}
}
// down
if (Tag==DownButtonTag) {
if (playField[representationX][representationY+1]==3) {
[self doDie];
doIt=false;
}
}
// special things ...
if (doIt)
{
playField[representationX][representationY]=3;
[gameViewObj DrawLine];
}
}
// case: back to the secure line
if (playField[representationX][representationY]==2)
if (!onSecretLine)
{
[gameViewObj.spaceshipImageView setCenter:CGPointMake(representationX, representationY)];
availableOffline = NO;
onSecretLine = YES;
[[NSNotificationCenter defaultCenter] postNotificationName:@"FindBirdCenter" object:nil];
for (int i=0; i<[gameViewObj.birdImageViewArray count]; i++) {
UIImageView* ImgBird=[gameViewObj.birdImageViewArray objectAtIndex:i];
int px=ImgBird.center.x;
int py=ImgBird.center.y;
// cristall point
playField[px][py]=5;
}
[self fillPlaygroundExtended];
//Elan function for filling area enclosed
[self fillAreaEnclosed:gameViewObj._myContext];
// invert ..
[self invertPlayground];
// turn the 3 into -> 20+
[self generateNewSecureLine];
}
if(Tag == UpButtonTag){
[self moveShipUp];
}
else if(Tag == RightButtonTag){
[self moveShipRight];
}
else if(Tag == DownButtonTag){
[self moveShipDown];
}
else if(Tag == LeftButtonTag){
[self moveShipLeft];
}
if(doScore == YES){
[self calculateScore];
doScore = NO;
}
[gameViewObj setNeedsDisplay];
}
}
推荐答案
您永远不要发布 thePath 。至少在该代码段中没有。
You never release thePath. At least not in that code snippet.
Core Graphics使用 Core Foundation Memory Rules ，您可以在 Core Foundation的内存管理编程指南
Core Graphics uses the Core Foundation Memory Rules, which you can read at Memory Management Programming Guide for Core Foundation
简而言之：名称中包含 Create 的任何函数都将返回保留的对象，您将需要使用<$ c $的函数来释放该对象。 c>发布。如果是 CGPathRef ，则有 CGPathRelease 。
In short: Any function that contains Create in its name will return a retained object that you will need to release with a function that Release in it's name. In case of a CGPathRef there is CGPathRelease.
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