Crash when get the fullScreenImage in Xcode 6.4

[kshan]

invalid attempt to access <ALAssetPrivate: 0x7f8946220cd0> past the lifetime of its owning ALAssetsLibrary
fatal error: unexpectedly found nil while unwrapping an Optional value

How to solove it?

[zhangao0086]

Hi @kshan

The type of fullScreenImage is Optional, maybe you have to check it nil or not like this:

if let fullScreenImage = asset.fullScreenImage {
    // do something...
}

Thanks for your used :)
Closing the thread... Let me know if you have any other questions :)

[kshan]

@zhangao0086 Thanks for your prompt reply. I found the solution to this in my case.

Crash happen to that I post data to server via fullScreenImage, but use thumbnailImage in collectionview after picks phtos, even if unwrapping an optional value. If i use fullScreenImage in collectionview too, it's normal.

[zhangao0086]

Thanks for your detail!

Could you make a test? Change these line:

public private(set) lazy var fullScreenImage: UIImage? = {
    return UIImage(CGImage: self.originalAsset?.defaultRepresentation().fullScreenImage().takeUnretainedValue())
}()

to that:

public private(set) lazy var fullScreenImage: UIImage? = {
    return UIImage(CGImage: self.originalAsset?.defaultRepresentation().fullScreenImage(). takeRetainedValue())
}()

I think this will resolve your issue. Let me know if that works. TIA :)

[nishantdongare]

Hello @zhangao0086 . I tried to do this . But this is also not working. I am using iOS 9.0

[zhangao0086]

Hi @nishantdongare @kshan

The issue has been fixed. Here is my solution:

1. Define the library as a singleton property:static private let library = ALAssetsLibrary()
2. Replace self.library.enumerateGroupsWithTypes... with self.dynamicType.library.enumerateGroupsWithTypes...

This will always use the same library for all accesses to the assets.
Let me know if you have any other questions :)