writetofile always returns false

Question

I am trying to write content to a file in swift

let jsonResult = try!   NSJSONSerialization.JSONObjectWithData(response.data, options:   NSJSONReadingOptions.MutableContainers) as! NSDictionary   

let fileManager = NSFileManager.defaultManager()
let urls = fileManager.URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)

let documentDirectory = urls.first!.path
let path = NSURL(fileURLWithPath: documentDirectory!).URLByAppendingPathComponent("data.txt")
let dict = jsonResult as NSDictionary
let status = dict.writeToFile(path.path!, atomically: false)
print(status)

But content is not written to file and status is always false

score 0 · Answer 1 · edited May 23 '17 at 12:13

0

You can't write to your application's bundle. Instead, try writing to your application's documents directory. See this question: Write a file on iOS

edited May 23 '17 at 12:13

Community

1
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answered Mar 07 '16 at 05:36

Aaron Wojnowski

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@Aron Wojnowski I tried that first.Please see my modified quetion – jithin Mar 07 '16 at 05:44

Vignesh Kumar · Accepted Answer · 2016-03-07T08:43:04.813

Swift 2

        let file = "file.txt" //this is the file. we will write to and read from it

        let jsonResult : NSMutableDictionary = NSMutableDictionary.init(object: "08:00:00", forKey: "start_hour");
        jsonResult.setValue("10:00:00", forKey: "end_hour");
        jsonResult.setValue("30", forKey: "call_duration");

        let dict = jsonResult as NSDictionary

        if let dir : NSString = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.AllDomainsMask, true).first {
            let path = NSURL(fileURLWithPath: dir as String).URLByAppendingPathComponent(file);

            //writing
            dict.writeToFile(path.path!, atomically: false)

            var contents : NSString
            //reading
            do {
                contents = try NSString(contentsOfFile: path.path!, encoding: NSUTF8StringEncoding)
            }
            catch {
                /* error handling here */
                contents  = ""
            }
            print(contents as String);
        }

If you already have a file in bundle, Use following code to find path and read file.

    let path = NSBundle.mainBundle().pathForResource("sample-text", ofType: "txt")

    let contents: NSString
    do {
        contents = try NSString(contentsOfFile: path!, encoding: NSUTF8StringEncoding)
    } catch _ {
        contents = ""
    }

Parse Web service response :

        // responseData - API response data.

        // parse the result as JSON, since that's what the API provides
        let getConfig: NSDictionary
        do {
             getConfig = try NSJSONSerialization.JSONObjectWithData(responseData, options: NSJSONReadingOptions()) as! NSDictionary
        } catch  {
            print("error trying to convert data to JSON")
        }

stringByAppendingPathComponent does not work in xcode 7(deprecated) .which is why i used URLByAppendingPathComponent. — jithin, Mar 07 '16 at 06:22
I am using xcode 7.1. I didn't get deprecated issue. however, I have updated code. — Vignesh Kumar, Mar 07 '16 at 06:38
Have you test above example?. Is it fix your issue @jithin ? — Vignesh Kumar, Mar 07 '16 at 06:59
Yes this works with your content as json but does not work with my json data. — jithin, Mar 07 '16 at 07:39
yes response data is json serialised and then converted to dictionary before writing to file — jithin, Mar 07 '16 at 09:33

writetofile always returns false

2 Answers2