Ios6 图像捕获中的应用程序崩溃

我正在应用程序中捕获图像，我的应用程序收到内存警告，应用程序崩溃 下面是我使用的代码。。。请帮忙。 此应用程序类似于从gallery中拾取图像并向其添加动画。当动画运行时，将捕获图像并使其成为视频

我在拍摄动画图像时收到内存警告

-(void)captureImage:(NSTimer*) t {
NSLog(@"captureImage");


// Create a graphics context with the target size
// On iOS 4 and later, use UIGraphicsBeginImageContextWithOptions to take the scale into  consideration
// On iOS prior to 4, fall back to use UIGraphicsBeginImageContext
CGSize imageSize = CGSizeZero;

UIInterfaceOrientation orientation = 
[UIApplication    sharedApplication].statusBarOrientation;
if (UIInterfaceOrientationIsPortrait(orientation)) {
    imageSize = [UIScreen mainScreen].bounds.size;
    NSLog(@"imageSize:%@  ",NSStringFromCGSize(imageSize));
} else {
    imageSize = 
 CGSizeMake([UIScreen mainScreen].bounds.size.height, 
 [UIScreen mainScreen].bounds.size.width);
//CGSizeMake(animatedImgView.frame.size.width, animatedImgView.frame.size.height);//
}

UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);
CGContextRef context = UIGraphicsGetCurrentContext();
for (UIWindow *window in [[UIApplication sharedApplication] windows]) {


    CGContextSaveGState(context);
    CGContextTranslateCTM(context, window.center.x, window.center.y);
    CGContextConcatCTM(context, window.transform);
    CGContextTranslateCTM(context,
  -window.bounds.size.width * window.layer.anchorPoint.x, 
 -window.bounds.size.height * window.layer.anchorPoint.y);
    if (orientation == UIInterfaceOrientationLandscapeLeft) {
        CGContextRotateCTM(context, M_PI_2);
        CGContextTranslateCTM(context, 0, -imageSize.width);
    } else if (orientation == UIInterfaceOrientationLandscapeRight) {
        CGContextRotateCTM(context, -M_PI_2);
        CGContextTranslateCTM(context, -imageSize.height, 0);
    } else if (orientation == UIInterfaceOrientationPortraitUpsideDown) {
        CGContextRotateCTM(context, M_PI);
        CGContextTranslateCTM(context, -imageSize.width, -imageSize.height);
    }
    if 
([window
respondsToSelector:@selector(drawViewHierarchyInRect:afterScreenUpdates:)])     {
         [window drawViewHierarchyInRect:window.bounds afterScreenUpdates:NO];
        //[animatedImgView drawViewHierarchyInRect:window.bounds afterScreenUpdates:NO];
    } else {

        //[window.layer.presentationLayer renderInContext:context];
    }
    CGContextRestoreGState(context);
    }


 //   @autoreleasepool {
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    [savedImages addObject:image];
    image = nil;
 //  }

  }

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谢谢你的帮助

我认为将图像设置为零是不够的。见：

出现异常的另一个原因可能是内存中的图像太多。它们存放在哪里？文件系统？数据库记忆