Whether the downloaded file is downloaded to memory or disk.
If it is in the memory, it will definitely be gone when you exit and come back.
If it is on the disk, check whether it is saved successfully on the disk.
Is the file path correct? You must use a relative path. You cannot save an absolute path and then use the absolute path to open it next time. Every time you restart the app, the path to the sandbox will change.
Opening method, I don’t know how you open it, so I can’t comment.
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Possibility:
Whether the downloaded file is downloaded to memory or disk.
If it is in the memory, it will definitely be gone when you exit and come back.
If it is on the disk, check whether it is saved successfully on the disk.
Is the file path correct? You must use a relative path. You cannot save an absolute path and then use the absolute path to open it next time. Every time you restart the app, the path to the sandbox will change.
Opening method, I don’t know how you open it, so I can’t comment.