UIImagePickerController崩溃“资产连接中断或资产死亡”

Question

我一直在努力解决这个问题令人作呕，但仍然无法弄清楚导致崩溃的原因。我从按钮实例化相机，此后当用户选择照片时，我将照片添加到我的images阵列并重新加载collectionView。大约20次后，我得到控制台中的输出“资产连接中断或资产死亡”，随后发生崩溃。当我从委托方法“didFinishPickingMediaWithInfo”中删除collectionView？.reloadData（）方法时，它不会崩溃。这让我非常混淆。请参阅以下代码：

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: Dictionary) {
if let image = info["UIImagePickerControllerOriginalImage"] as? UIImage {

images.append(image)

// when i remove this method the app doesnt crash! 
collectionView.reloadData()
collectionView?layoutIfneeded()

dismiss(animated: true, completion: nil)

}

这是解决方案，请注意压缩大小是硬编码的，您可能希望根据需要调整代码或重构并改进方法。

func imageCompression(_ imageDict: [String : UIImage]) -> [String : Data] {
    var compressedImages = [String : Data]()

    for (key, value) in imageDict {
        var resizeAttempts = 5
        var compressionRatio: CGFloat = 1
        var imageData = UIImageJPEGRepresentation(value, compressionRatio)

        if imageData?.count <= 90000 {
            compressedImages[key] = imageData
        } else {

            while imageData?.count > 90000 && resizeAttempts > 0 {
                resizeAttempts -= 1
                compressionRatio = compressionRatio * 0.5
                imageData = UIImageJPEGRepresentation(value, compressionRatio)
                compressedImages[key] = imageData
                print("image size now is \(imageData?.count)")

            }
        }
    }
    return compressedImages
}