帮助我理解这段代码的泄漏：
可能的重复：
如何释放对象声明到一个方法中并传递给另一个方法？
你能帮我修复这段代码中的泄漏吗：
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
UIImage *payload = [[UIImage alloc] initWithData:self.activeDownload];
UIImage *picture = [[UIImage alloc] init];
if (payload.size.width != kAppIconHeight && payload.size.height != kAppIconHeight)
{
CGSize itemSize = CGSizeMake(kAppIconHeight, kAppIconHeight);
UIGraphicsBeginImageContext(itemSize);
CGRect imageRect = CGRectMake(0.0, 0.0, itemSize.width, itemSize.height);
[payload drawInRect:imageRect];
picture = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
}
else
{
picture = payload;
}
self.activeDownload = nil;
[payload release];
self.imageConnection = nil;
[delegate ThumbDidLoad:self.indexPathInTableView Image:[picture autorelease]];
}
谢谢你的帮助，
Stephane
Possible Duplicate:
How to release an object declared into a method and passed to another method?
Can you help me fix leaks in this code:
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
UIImage *payload = [[UIImage alloc] initWithData:self.activeDownload];
UIImage *picture = [[UIImage alloc] init];
if (payload.size.width != kAppIconHeight && payload.size.height != kAppIconHeight)
{
CGSize itemSize = CGSizeMake(kAppIconHeight, kAppIconHeight);
UIGraphicsBeginImageContext(itemSize);
CGRect imageRect = CGRectMake(0.0, 0.0, itemSize.width, itemSize.height);
[payload drawInRect:imageRect];
picture = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
}
else
{
picture = payload;
}
self.activeDownload = nil;
[payload release];
self.imageConnection = nil;
[delegate ThumbDidLoad:self.indexPathInTableView Image:[picture autorelease]];
}
Thx for helping,
Stephane
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当您在
if语句中设置picture = UIGraphicsGetImageFromCurrentImageContext()或在else语句中设置picture = Payload时，您正在丢失指向您在第一行的picture中分配的先前分配的 UIImage 的指针，但您从未释放它。您不应该为
picture分配+初始化一个新的 UIImage，因为您从不使用它并稍后为该变量分配新值...但从未使用和释放之前分配的值。When you set
picture = UIGraphicsGetImageFromCurrentImageContext()in yourifstatement orpicture = payloadin yourelsestatement, you are loosing the pointer to the previously allocated UIImage you assigned inpicturein the first lines, but you never released it.You shouldn't alloc+init a new UIImage for
picture, as you never use it and assign a new value to this variable later... but never used and released the previously allocated one.UIImage *picture = [[UIImage alloc] init];和picture = UIGraphicsGetImageFromCurrentImageContext();您不应在代码开头初始化
picture。UIGraphicsGetImageFromCurrentImageContext返回已初始化的UIImage（自动释放）。UIImage *payload = [[UIImage alloc] initWithData:self.activeDownload];，图片=有效负载;，[有效负载释放];。您应该使用
[payload autorelease]，否则您将释放图像而不使用它。[委托 ThumbDidLoad:self.indexPathInTableView Image:[图片自动释放]];您应该删除
[图片自动释放]并仅使用图片。UIImage *picture = [[UIImage alloc] init];andpicture = UIGraphicsGetImageFromCurrentImageContext();You should not initialize
pictureat the beginning of the code.UIGraphicsGetImageFromCurrentImageContextreturns a already initializedUIImage(autoreleased).UIImage *payload = [[UIImage alloc] initWithData:self.activeDownload];,picture = payload;,[payload release];.You should use
[payload autorelease]instead, otherwise you're releasing the image without ever using it.[delegate ThumbDidLoad:self.indexPathInTableView Image:[picture autorelease]];You should remove
[picture autorelease]and just usepicture.