How to access NSMutableArray from Objective-C in Swift

Question

I created an array called events in Objective-C, and I want to be able to add events to the array in Swift. Here is my declaration of the property in Objective-C:

@property (nonatomic, strong) NSMutableArray *events;

Here is my usage of the array in the Swift file.

var objectC = DPCalendarTestStoryboardViewController()

@IBAction func addMedicine(sender: AnyObject) {
    objectC.events = [].mutableCopy
    var event: DPCalendarEvent = DPCalendarEvent(title: nameText.text, startTime: startDatePicker.date, endTime: startDatePicker.date, colorIndex: 2)
    objectC.events.append(event)
}

Here is the error message:

Value of type 'DPCalendarTestStoryboardViewController' has no member 'events'

Have you created an objective c bridging header?

Paulw11
– Paulw11

2016-04-09 04:44:14 +00:00
Commented Apr 9, 2016 at 4:44 — Paulw11
– Paulw11, Commented Apr 9, 2016 at 4:44

gunjot singh · Accepted Answer · 2016-04-09 04:54:28Z

2

Objective-C NSMutableArray and Swift Array are different. You can still use NSMutableArray and all its methods in Swift.

Replace Code with

@IBAction func addMedicine(sender: AnyObject) {
    objectC.events = NSMutableArray()
    var event: DPCalendarEvent = DPCalendarEvent(title: nameText.text, startTime: startDatePicker.date, endTime: startDatePicker.date, colorIndex: 2)
    objectC.events.addObject(event)
}

and also you need to declare events property in .h file and

instantiate your DPCalendarTestStoryboardViewController viewController using storyboard reference

var objectC =  UIStoryboard(name: "storyboardNameHere", bundle: nil).instantiateViewControllerWithIdentifier("viewControllerIdentifier") as? DPCalendarTestStoryboardViewController

edited Apr 9, 2016 at 4:54

answered Apr 9, 2016 at 4:35

gunjot singh

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16 Comments

elswat Over a year ago

It still has an error :( I think the problem has something to do more with how I'm calling the array from objectC. But thanks anyways!

gunjot singh Over a year ago

You need to declare events property in .h file

elswat Over a year ago

Ugh, I got an error. Any idea how to fix it? Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<Technovation_2016.CategoryLabelTableViewController 0x7c072510> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key exerciseCell.'

gunjot singh Over a year ago

yep, instantiate your DPCalendarTestStoryboardViewController viewController using storyboard reference

elswat Over a year ago

Um, sorry, how exactly do you do that?

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