Swift - Insert [AnyObject] into [NSMutableDictionnary]

Question

Fredo OP

Created Jul ’15

Replies 3

Boosts 0

Views 1.5k

Participants 2

Hello,

I am trying to build an app using tableView with two columns (one displaying strings, the other one a CheckBox for each string).

The strings are coming from a [AnyObject] variable.

I have try so many things to insert the result of [AnyObject] into the NsMutableDictionnary (which is used by NsTableView) but none of them works.

I have to build the dic manually with the right number of object (related to the result of [AnyObject]) to make it work but I would like the dic to build itself automatically.

Here is an exemple of the code, working if [AnyObject] is made with 4 elements. The TableView column names are "jobs" and "unload" :

import Cocoa

@NSApplicationMain

class AppDelegate: NSObject, NSApplicationDelegate,NSTableViewDataSource,NSTableViewDelegate {

@IBOutlet weak var window: NSWindow!

@IBOutlet weak var myTableView: NSTableView!

var dataArray:[NSMutableDictionary] = [["jobs": "", "unload": 0],["jobs": "", "unload": 0],["jobs": "", "unload": 0],["jobs": "", "unload": 0]];

func applicationDidFinishLaunching(aNotification: NSNotification) {

...

var ctlelems:[AnyObject] = grepOut!.componentsSeparatedByCharactersInSet(NSCharacterSet.newlineCharacterSet())

dataArray = [["jobs": "ctlelems[0]", "unload": 0],["jobs": "ctlelems[1]", "unload": 0],["jobs": "ctlelems[2]", "unload": 0],["jobs": "ctlelems[3]", "unload": 0]];

}

func applicationWillTerminate(aNotification: NSNotification) {

}

func numberOfRowsInTableView(aTableView: NSTableView) -> Int

{

return dataArray.count

}

func tableView(tableView: NSTableView, objectValueForTableColumn tableColumn: NSTableColumn?, row: Int) -> AnyObject?

{

let object = dataArray[row] as NSMutableDictionary

if ((tableColumn!.identifier) == "unload")

{

println(object)

return object[tableColumn!.identifier] as? Int!

}

else

{

return object[tableColumn!.identifier] as? String!

}

func tableView(tableView: NSTableView, setObjectValue object: AnyObject?, forTableColumn tableColumn: NSTableColumn?, row: Int)

{

dataArray[row].setObject(object!, forKey: (tableColumn?.identifier)!)

}

I would like to do the following,

var x: Int = 0

for lines in ctlelems {

dataArray = [["jobs": ctlelems[x], "unload": 0]];

x=x+1

}

but it is not working.

Most of the time I get "Found nill" error, or only the last element of [AnyObject] is displayed.

Could someone help me please?

Boost

Answer 1

OOPer OP

Jul ’15

This code:

            dataArray = [["jobs": ctlelems[x], "unload": 0]];

is replacing the whole content of dataArray with the single element array. It does not work as "Insert".

To append an element to Array:

            dataArray += [["jobs": ctlelems[x], "unload": 0]]

or

            dataArray.append(["jobs": ctlelems[x], "unload": 0])

"Found nil" is another problem. You use too much unwrapping operators ("!"), without checking the optional value is nil or not.

Put nil checking code before using "!".

0

Answer 2

Fredo OP

Jul ’15

Thank you for this answer, it is working better now (but not yet perfectly).

If I try the first exemple, I get the following error :

Binary operator '+=' cannot be applied to operands of type '[NSMutableDictionary]' and '[Dictionary<String, AnyObject>]'

If I use .append, the elements are properlly added to the dictionnary :

var x: Int = 0
        for lines in ctlelems
        {
            dataArray.append (["jobs": ctlelems[x], "unload": 0]);
            x=x+1
            }

Gives :

[{

jobs = "element1";

unload = 0;

}, {

jobs = "element2";

unload = 0;

}]

But, println(dataArray.count) Is reporting only one element (1)

func numberOfRowsInTableView(aTableView: NSTableView) -> Int
    {
        println(dataArray.count)
        return dataArray.count
    }

And

println(object)

which is inside {... objectValueForTableColumn...} is reporting the following :

{

jobs = "";

unload = 0;

}, {

jobs = "";

unload = 0;

}

I have initialize dataArray using the following code, is it correct?:

var dataArray:[NSMutableDictionary] = [["jobs": "", "unload": 0]];

Regards.

0

Answer 3

OOPer OP

Jul ’15

Binary operator '+=' cannot be applied to operands of type '[NSMutableDictionary]' and '[Dictionary<String, AnyObject>]'

Sorry, I have missed checking, it seems you need explicit casting in this case.

            dataArray += [["jobs": ctlelems[x], "unload": 0] as NSMutableDictionary]

But, println(dataArray.count) Is reporting only one element (1)

Well, the result depends on where the code conaining `dataArray.append` is put, and when the output is generated.

I have initialize dataArray using the following code, is it correct?:

Syntactically, it's correct. But I cannot say anything about why you cannot get expected results, with that single line of code.

0