CODEWITHSUNDEEP
iosuitableviewswiftplist
stringRay2014
stringRay2014

Reputation: 646

read/write to array plist with Swift

Im trying to read a plist that contains an Array of Ints . This is my first time using them , and i can read them in fine , but the plist doesn't update when i write to it.

here's my code for the reading and writing..

class FavouritesManager {
    var myArray:NSMutableArray = [0]
    func loadDataPlist(){
        let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) as NSArray
        let documentsDirectory = paths.objectAtIndex(0)as NSString
        let path = documentsDirectory.stringByAppendingPathComponent("FavouriteIndex.plist")
        let fileManager = NSFileManager.defaultManager() 
        if(!fileManager.fileExistsAtPath(path))
        {
            let bundle = NSBundle.mainBundle().pathForResource("FavouriteIndex", ofType: "plist")
            fileManager.copyItemAtPath(bundle!, toPath: path, error:nil)
        }
        myArray = NSMutableArray(contentsOfFile: path)!
        println(myArray)
    }
    func writeToPlist(indexValue:Int) {

        if let path = NSBundle.mainBundle().pathForResource("FavouriteIndex", ofType: "plist"){
            myArray.addObject(indexValue)
            myArray.addObject(indexValue+5)
            myArray.addObject(indexValue+10)
            myArray.addObject(indexValue+15)
            myArray.writeToFile(path, atomically: true)
        }
    }

The purpose of this code is to store the index of the tableViewCell that has been favourited so that I can display that row in my favourite tableViewControllwe

BTW - my plist looks like this... enter image description here Thanks !

Upvotes: 2

Views: 8046

Answers (1)

timgcarlson
timgcarlson

Reputation: 3146

Your problem is that you are loading the plist into your documents directory in loadDataPlist(), but you are still pulling the plist from it's original location in your writeToPlist(indexValue:) function. So you are trying to write to a plist at a readonly location. Change your write function to this:

func writeToPlist(indexValue:Int) {
    var paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String
    var path = paths.stringByAppendingPathComponent("MyPlist.plist")

    if var plistArray = NSMutableArray(contentsOfFile: path) {
        plistArray.addObject(indexValue)
        plistArray.addObject(indexValue+5)
        plistArray.addObject(indexValue+10)
        plistArray.addObject(indexValue+15)
        plistArray.writeToFile(path, atomically: false)
    }
}

Note that instead of adding the values to myArray I'm only writing to the plist. You'll have to decide if you want to maintain the two arrays (the local variable myArray and the array in the plist) depending on what you're using this for. Either way, this should fix your problem.

Upvotes: 4

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