UIImageWriteToSavedPhotosAlbum显示iPhone连接到仪器时内存泄漏

我使用的是SDK的3.0.1版

当iPhone连接到仪器时，当我调用UIImageWriteToSavedPhotosAlbum时，内存泄漏

下面是我的代码：

    NSString *gnTmpStr = [NSString stringWithFormat:@"%d", count];

UIImage *ganTmpImage = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:gnTmpStr ofType:@"jpg"]];

// Request to save the image to camera roll
UIImageWriteToSavedPhotosAlbum(ganTmpImage, self, @selector(imageSavedToPhotosAlbum:didFinishSavingWithError:contextInfo:), nil);

和选择器方法

        - (void)imageSavedToPhotosAlbum:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo {
NSString *message;
 NSString *title;
 if (!error)
 {
  title = @"Wallpaper";
  message = @"Wallpaper Saved";

 }
 else
 {
  title = @"Error";
  message = [error description];

 }
 UIAlertView *alert = [[UIAlertView alloc]
        initWithTitle:title
        message:message 
        delegate:self
        cancelButtonTitle:@"OK"
        otherButtonTitles:nil];
 [alert show];
 [alert release];

    }

一旦图像被保存并且调用了选择器方法ImageSavedPhotosAlbum，我是否忘记发布一些内容？或者UIImageWriteToSavedPhotosAlbum是否存在已知的问题

以下是仪器的堆栈跟踪：

Leaked Object: GeneralBlock-3584 size: 3.50 KB 30 MyApp start 29 MyApp main /Users/user/Desktop/MyApp/main.m:14 28 UIKit UIApplicationMain 27 UIKit -[UIApplication _run] 26 GraphicsServices GSEventRunModal 25 CoreFoundation CFRunLoopRunInMode 24 CoreFoundation CFRunLoopRunSpecific 23 GraphicsServices PurpleEventCallback 22 UIKit _UIApplicationHandleEvent 21 UIKit -[UIApplication sendEvent:] 20 UIKit -[UIWindow sendEvent:] 19 UIKit -[UIWindow _sendTouchesForEvent:] 18 UIKit -[UIControl touchesEnded:withEvent:] 17 UIKit -[UIControl(Internal) _sendActionsForEvents:withEvent:] 16 UIKit -[UIControl sendAction:to:forEvent:] 15 UIKit -[UIApplication sendAction:toTarget:fromSender:forEvent:] 14 UIKit -[UIApplication sendAction:to:from:forEvent:] 13 CoreFoundation -[NSObject performSelector:withObject:withObject:] 12 UIKit -[UIBarButtonItem(Internal) _sendAction:withEvent:] 11 UIKit -[UIApplication sendAction:to:from:forEvent:] 10 CoreFoundation -[NSObject performSelector:withObject:withObject:] 9 MyApp -[FlipsideViewController svPhoto] /Users/user/Desktop/MyApp/Classes/FlipsideViewController.m:218 8 0x317fa528 7 0x317e3628 6 0x317e3730 5 0x317edda4 4 0x3180fc74 3 Foundation +[NSThread detachNewThreadSelector:toTarget:withObject:] 2 Foundation -[NSThread start] 1 libSystem.B.dylib pthread_create 0 libSystem.B.dylib malloc 同样的漏洞在应用程序加载后立即出现

谢谢你的帮助

---

布莱恩（Bryan）

快速查看不会发现任何你拥有的需要释放的物品。在代码中查找获得新对象、alloc、copy或retain的位置。这些是您必须担心释放的对象。

快速查看并不会显示您拥有的任何对象以及需要释放的对象。在代码中查找获得新对象、alloc、copy或retain的位置。这些都是你必须担心释放的对象。

我想我解决了这个问题。它与contextInfo有关。下面是我所做的，内存泄漏似乎不再出现：

请注意，您必须定义contextInfo的对象类型

-(IBAction)savePhoto{

 UIImageWriteToSavedPhotosAlbum([UIImage imageNamed:imageName], self, @selector(image:didFinishSavingWithError:contextInfo:), nil);

//MEMORY LEAK HERE
}

- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(NSDictionary *)contextInfo {  
    if (error != NULL){
  UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Image was not saved, sorry" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
  [alert show];
  [alert release];
    }
    else { //no errors


  //tell the user photo ok:
  UIAlertView *alert = [[UIAlertView alloc] initWithTitle:contents message:@"Image was saved to your photos" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
  [alert show];
  [alert release];
    }
 if (image !=NULL){
 [image release];
 image=nil;
 }
 if(contextInfo !=NULL){
  [contextInfo release];
  contextInfo=nil;
 }

}

---

我想我解决了这个问题。它与contextInfo有关。下面是我所做的，内存泄漏似乎不再出现：

请注意，您必须定义contextInfo的对象类型

-(IBAction)savePhoto{

 UIImageWriteToSavedPhotosAlbum([UIImage imageNamed:imageName], self, @selector(image:didFinishSavingWithError:contextInfo:), nil);

//MEMORY LEAK HERE
}

- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(NSDictionary *)contextInfo {  
    if (error != NULL){
  UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Image was not saved, sorry" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
  [alert show];
  [alert release];
    }
    else { //no errors


  //tell the user photo ok:
  UIAlertView *alert = [[UIAlertView alloc] initWithTitle:contents message:@"Image was saved to your photos" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
  [alert show];
  [alert release];
    }
 if (image !=NULL){
 [image release];
 image=nil;
 }
 if(contextInfo !=NULL){
  [contextInfo release];
  contextInfo=nil;
 }

}

---

谢谢你的回复和信息。我已经检查了我的代码，似乎找不到任何我没有发布的东西。我在上面的问题中添加了来自仪器的堆栈跟踪。泄漏位于：GeneralBlock-3584中，大小为：3.50 KB再次感谢您的帮助。我对一个新项目进行了测试，只在viewdidload中添加了以下代码：NSString*gnTmpStr=[NSString stringWithFormat:@“DefaultTest”]；UIImage*ganTmpImage=[UIImage imageWithContentsOfFile:[[NSBundle mainBundle]pathForResource:gnTmpStr的类型：@“png”]；//请求将图像保存到相机卷UIImageWriteToSavedPhotosAlbum（甘特图，nil，nil，nil）；同样的漏洞在应用程序加载后立即出现。我在苹果开发者论坛上发布了这个问题，这里是链接。谢谢你的回复和信息。我已经检查了我的代码，似乎找不到任何我没有发布的东西。我在上面的问题中添加了来自仪器的堆栈跟踪。泄漏位于：GeneralBlock-3584中，大小为：3.50 KB再次感谢您的帮助。我对一个新项目进行了测试，只在viewdidload中添加了以下代码：NSString*gnTmpStr=[NSString stringWithFormat:@“DefaultTest”]；UIImage*ganTmpImage=[UIImage imageWithContentsOfFile:[[NSBundle mainBundle]pathForResource:gnTmpStr的类型：@“png”]；//请求将图像保存到相机卷UIImageWriteToSavedPhotosAlbum（甘特图，nil，nil，nil）；同样的漏洞在应用程序加载后立即出现。我在苹果开发者论坛上发布了这个问题，这里是链接。