nlharri / rsnt-really-simple-note-taking-ios Goto Github PK
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License: MIT License
Really Simple Note Taking App for iOS
License: MIT License
Hi László Harri,
Thank you for your clear & simple code example. It enables me to learn CoreData concept easier.
However, I do have some suggestion on the sample code.
I notice you are using the following code, to "return back" to MasterViewController
from ReallySimpleNoteCreateChangeViewController
// navigate back to list of notes
performSegue(
withIdentifier: "backToMasterView",
sender: self
)
However, by doing so, a new MasterViewController
will be created each time, with old MasterViewController
still remain in memory stack. This can be confirmed, by adding some debug message in MasterViewController
's init and deinit
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
print("MasterViewController init")
}
deinit {
print("MasterViewController's deinit")
}
We will observe that init
being called multiple times, and deinit
never being called. Very soon. Out of memory may occur. I guess, we should use an unwind segue.
For
private var noteIndexToIdDict : [Int:UUID] = [:]
May I suggest that using
private var noteIds : [UUID] = []
We may use the Int index to perform direct array access.
I appreciate your tutorial and code sample. It enables me to kick start learning Core Data with less pressure.
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