iOS 8 App上的内存警告-但使用率较低

我希望有人能帮助我，我已经搜索过Stackoverflow和Google，但我找不到正确的解决方案。我有一个非常简单的应用程序，它可以拍摄照片（通过UIImagePickerController使用标准的iOS相机），然后将其以非常低的分辨率保存到文件系统中-let thumbNailData = UIImageJPEGRepresentation(image, 0.02)之后，我将使用Core Data在集合视图中显示图像-仅将文件名保存在核心数据中，而不是图像中，图像仅在文件系统中。因此，但是，当我运行该应用程序时，它显示的内存使用量不超过15 MB，进程约为1-2％。一切运行正常，但添加6-7张照片后，出现奇怪的错误，例如“内存警告”，与我的iPhone的连接断开等：

Communications error: <OS_xpc_error: <error: 0x198adfa80> { count = 1, contents =
    "XPCErrorDescription" => <string: 0x198adfe78> { length = 22, contents = "Connection interrupted"

所以，我真的很卡住，因为我认为我做的很轻巧，然后出现了这些错误....我已经向App Store提交了一个笔记应用程序，该应用程序的功能比该应用程序高得多，但该应用程序运行非常稳定...

有任何想法吗？

这是我的一些代码：//这里，我将图片名称加载到一个数组中以在集合视图中显示

func loadColl () {
        let appDelegate = (UIApplication.sharedApplication().delegate as AppDelegate)
        let context:NSManagedObjectContext = appDelegate.managedObjectContext!
        let fetchRequest:NSFetchRequest = NSFetchRequest(entityName: "PictureNote")
        var error:NSError?
        var result = context.executeFetchRequest(fetchRequest, error: &error) as [PictureNote]

        for res in result {
            println(res.latitude)
            println(res.longitude)
            println(res.longDate)
            println(res.month)
            println(res.year)
            println(res.text)
           pictures.append(res.thumbnail)
        }

    }

//这是要在集合视图中显示的代码

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {

        let myImageCell:ImageCell = myCollectionView.dequeueReusableCellWithReuseIdentifier("imageCell", forIndexPath: indexPath) as ImageCell
        myImageCell.imageCell.image = self.loadImageFromPath(fileInDocumentsDirectory(self.pictures[indexPath.row]))
        return myImageCell
    }

//这是从磁盘加载图片的代码

func loadImageFromPath(path: String) -> UIImage {
    let image = UIImage(contentsOfFile: path)
    if image == nil {
        self.newAlert("Error loading your image, try again", title: "Notice")
    }
    return image!
}

//这是我的保存代码

func saveNewEntry () {
        var unique = NSUUID().UUIDString
        var imageTitle = "Picture\(unique).jpg"
        var image = self.pickedImageView.image
        var path = fileInDocumentsDirectory(imageTitle)
        var thumbImageTitle = "ThumbPicture\(unique).jpg"
        var thumbPath = fileInDocumentsDirectory(thumbImageTitle)
        if self.saveImage(image!, path: path) == true && self.saveThumbImage(image!, thumbPath: thumbPath) == true {
            // Create the saving context
            let context = (UIApplication.sharedApplication().delegate as AppDelegate).managedObjectContext!
            let entityOne = NSEntityDescription.entityForName("PictureNote", inManagedObjectContext: context)
            let thisTask = PictureNote(entity: entityOne!, insertIntoManagedObjectContext: context)
            // Get all the values here
            self.getMyLocation()
            var theDate = NSDate()
            thisTask.month = Date.toString(date: theDate, format: "MM")
            thisTask.year = Date.toString(date: theDate, format: "yyyy")
            thisTask.longDate = theDate
            thisTask.longitude = getMyLocation()[1]
            thisTask.latitude = getMyLocation()[0]
            thisTask.text = self.noteTextView.text
            thisTask.imageURL = imageTitle
            thisTask.thumbnail = thumbImageTitle
            thisTask.id = unique
            // Saving to CoreData
            if context.save(nil) {
                self.newAlert("Saving your note was successful!", title: "Notice")
                self.noteTextView.text = ""
            } else {
                 self.newAlert("Error saving your note, try again", title: "Notice")
            }

        } else {

          self.newAlert("Error saving your image, try again", title: "Notice")
        }


        self.pickedImageView.image = UIImage(named: "P1000342.jpg")
    }

我真的很感谢每一个建议。...如果您需要更多代码，请告诉我...