CODEWITHSUNDEEP
iosswiftswift3plist
user7418039
user7418039

Reputation: 311

plist not updating in ios project (swift 3.0)

I need to persist 5 boolean values to keep track of user's progress in the app. I thought using Core Date for this purpose was overkill so I decided to use Property List (PList) instead.

In my app, there is ToolTipData.plist where I store 5 boolean values. The default boolean values are false. And I want to change the values to true in certain occasions.

Here is how I update the value in dictionary and write to plist:

  static func updatePList() {
        if let path = Bundle.main.path(forResource: "TooltipViewData", ofType: "plist") {
            let dic = NSMutableDictionary(contentsOfFile: path)
            dic?.setValue(NSNumber.init(booleanLiteral: true), forKey: "firstToolTipViewSeen")
            if dic?.write(toFile: path, atomically: true) == true {
                print("saved")
            } else {
                print("not saved")
            }
            print("reading updated plist: \(NSMutableDictionary(contentsOfFile: path))")
        }
    }

As a result, I get saved prints and 

reading updated plist: Optional({
    firstToolTipViewSeen = 1;
    secondToolTipViewSeen = 0;
    thirdToolTipViewSeen = 0;
})

Then, I click the Plist file in the app then I find that firstToolTipViewSeen's value is still NO even though I updated to YES through above method. Is PList file not supposed to be updated or am i doing something wrong?

Thanks

Upvotes: 0

Views: 609

Answers (1)

Papershine
Papershine

Reputation: 5223

Files in the app's bundle cannot be written.

You should create the plist in the Library directory and then modify from there.

Here's how to create the file:

var appDir = NSSearchPathForDirectoriesInDomains(.LibraryDirectory, .UserDomainMask, true)
let plistURL = documentDirectoryURL.URLByAppendingPathComponent("TooltipViewData.plist")
do {
    let fileExists = try plistURL.checkResourceIsReachable()
    if !fileExists {
        // create the plist, or move the plist from the main app bundle to plistURL
    }
} catch let error as NSError {
    print(error)
}

You can then save to the plist like you did before, this time using the URL plistURL.

Just a suggestion: Save user's prefences to NSUserDefaults

Upvotes: 1

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