swift UserDefaults return nil as NSMutableArray

Question

I have multi line texts and i save them UserDefaults. When i want to get the text sometimes return nil. But there is a text in it. How can i do that the nil does not return?

var savedReports: NSMutableArray = NSMutableArray()

    if let sR = defaults.object(forKey: "savedReports") as? NSMutableArray {
        savedReports = sR.mutableCopy() as! NSMutableArray
    }

Dave Weston · Accepted Answer · 2017-02-24 19:46:17Z

1

The UserDefaults API will always return immutable arrays. You want:

var savedReports: NSMutableArray = NSMutableArray()

if let sR = defaults.object(forKey: "savedReports") as? NSArray {
    savedReports = sR.mutableCopy()
}

answered Feb 24, 2017 at 19:46

Dave Weston

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4 Comments

JAL Over a year ago

Why not use Swift types instead of Foundation types?

Mr. Xcoder Over a year ago

@LeoDabus uh, sorry, haven't noticed that. Then just a sad use of Foundation instead of Swift

JAL Over a year ago

@Xcoder123 The Swift version is independent of using Swift vs Foundation types. I don't see how that's relevant.

Dave Weston Over a year ago

I could have used Swift types, and that's probably what I would do in most cases. I don't think it matters very much here, NSArray vs. [AnyObject]. Anyway, I just copied the original code sample and edited to work.

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