Swift : An array of [String : NSImage]

Question

I'm trying to create a array of dictionary<String,NSImage>,
so I do this:

class PreferencesController : NSObject{

var generalImage = NSImage(named: "NSAdvanced");
var textEditingImage = NSImage(named: "NSFontPanel");
var GUIImage = NSImage(named: "NSColorPanel");

var preferencesOptionTableList : NSMutableArray = [
    ["name":"General"],
    ["name":"Text Editing"],
    ["name":"GUI"]];

var preferencesOptionTableImageList : [[String:NSImage]] = [["image":textEditingImage]];
}

But I got this error:

PreferencesController.Type does not have a member named 
'textEditingImage'

Please help me I still don't know what to do after a hour of search

MirekE · Accepted Answer · 2015-02-09 04:25:05Z

1

I see two possible problems:

textEditingImage is most likely an optional NSImage?, not NSImage, which will most likely be a problem when you put it into the dictionary. I suspect you will need to unwrap it first.

The var preferencesOptionTableList : NSMutableArray... should be split into declaration and definition and the definition moved to init, possibly like this:

class PreferencesController: NSObject {


var textEditingImage:NSImage = NSImage(named: "NSFontPanel")!

var preferencesOptionTableImageList : [[String:NSImage]]

override init() {
    preferencesOptionTableImageList = [["image":textEditingImage]]
    super.init()
 }
}

edited Feb 9, 2015 at 4:25

answered Feb 9, 2015 at 4:18

MirekE

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4 Comments

QI HaoYan Over a year ago

Hi, thanks for reply. I tried this "var preferencesOptionTableImageList = [NSDictionary(object: textEditingImage?, forKey: "image")]; " but still the same error

TheCodingArt Over a year ago

@Ql HaoYan, adding a ? at the end of an optional only unwraps it for chained events. Try var textEditingImage = NSImage(named: "NSFontPanel")!

TheCodingArt Over a year ago

Also, note remove the ; at the end of all your statements and you don't have to specify constant or variable types unless you HAVE to specify them.... Swift is not Obj-C

QI HaoYan Over a year ago

That works, thank you very much. But I'm wondering why when I put "preferencesOptionTableImageList = [["image":textEditingImage]]" out of "init()" I got error "expected declaration"

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