Swift - Converting NSMutableArray to array of MKAnotationViews

Question

So essentialy this is what I have current. An array of

var bars = [BarAnnotation(latitude: 42.022352, longitude: -93.650413, name: "Micky's Irish Pub", deal: "$2 Drinks 9PM-1AM"),

    BarAnnotation(latitude: 42.021948, longitude: -93.650348, name: "Cy's Roost", deal: "$2 Drinks 9PM-1AM")

An array of my custom BarAnnotation class. The array is fixed in size obviously. What I've been trying to do it load the bar data from a JSON file and then create the array from there.

func retrieveData(){

    var filePath = NSBundle.mainBundle().pathForResource("test", ofType: "json")
    var data = NSData.dataWithContentsOfMappedFile(filePath!) as NSData
    var json = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: nil) as NSDictionary

    var test = [] as NSMutableArray

    let barArray = json["bars"] as NSArray


    for bar in barArray{
        var name = bar["name"] as NSString
        var deal = bar["deal"] as NSString
        var lat = bar["lat"] as Double
        var long = bar["long"] as Double
        var negLong = -long

        var newBar = BarAnnotation(latitude: lat, longitude: negLong, name: name, deal: deal)

        test.addObject(newBar)


    }

    bars.arrayByAddingObjectsFromArray(test)
}

Then I wanted to replace bars with this array "test". However, test is a type NSMutableArray and bars is an array of BarAnnotations fixed in size. When I try to convert it's causing errors. I feel like this is a simple fix I'm just having a hard time here. Anyone?

Here is my BarAnnotation class

class BarAnnotation: MKPointAnnotation {

var latitude, longitude, distance: Double
var name, imageName, deal: String
var location: CLLocationCoordinate2D
var loc: CLLocation
var annotation: MKPointAnnotation

init(latitude: Double, longitude: Double, name: String, deal: String) {
    self.latitude = latitude
    self.longitude = longitude
    self.name = name
    self.imageName = "image1.jpg"
    self.deal = deal
    self.distance = 0
    self.location = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
    self.loc = CLLocation(latitude: latitude, longitude: longitude)
    self.annotation = MKPointAnnotation()
    annotation.setCoordinate(self.location)
    annotation.title = name
    annotation.subtitle = deal
}

Then I try to access it here

        for bar in bars {
        var barName = bar.name.stringByReplacingOccurrencesOfString("\'", withString: "", options: NSStringCompareOptions.LiteralSearch, range: nil)
        var searchString = searchBar.text.stringByReplacingOccurrencesOfString("\'", withString: "", options: NSStringCompareOptions.LiteralSearch, range: nil)

        if barName.rangeOfString(searchString) != nil || barName.lowercaseString.rangeOfString(searchString.lowercaseString) != nil {
            var span = MKCoordinateSpanMake(0.005, 0.005)
            var region = MKCoordinateRegion(center: bar.location, span: span)
            mapView.setRegion(region, animated: true)
            mapView.selectAnnotation(bar.annotation, animated: true)
        }
    }

and this is the error

Answer 1

Your BarAnnotation is both inheriting from MKPointAnnotation and declaring a property of an MKPointAnnotation - this doesn't make sense. I presume you are adding bar.annotation as the annotation to your map view - Since BarAnnotation inherits from MKPointAnnotation you can just add the bar itself.

class BarAnnotation: MKPointAnnotation {

        var distance: Double
        var name, imageName, deal: String


        init(latitude: Double, longitude: Double, name: String, deal: String) {
            self.distance=0
            self.name = name
            self.imageName = "image1.jpg"
            self.deal = deal
            super.init()
            self.coordinate = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
            self.title = name
            self.subtitle = deal
    }

}

One thing I found, is that even though BarAnnotation inherits from MKPointAnnotation, Swift gives a deprecation error if you try and access the coordinate property directly. The solution is to cast the object to an MKPointAnnotation

for bar in bars  {
    let annotation=bar as MKPointAnnotation
    var barName = bar.name.stringByReplacingOccurrencesOfString("\'", withString: "", options: NSStringCompareOptions.LiteralSearch, range: nil)

    var searchString = searchBar.text.stringByReplacingOccurrencesOfString("\'", withString: "", options: NSStringCompareOptions.LiteralSearch, range: nil)

    if barName.rangeOfString(searchString) != nil || barName.lowercaseString.rangeOfString(searchString.lowercaseString) != nil {
        var span = MKCoordinateSpanMake(0.005, 0.005)
        var region = MKCoordinateRegion(center: annotation.coordinate, span: span)
        mapView.setRegion(region, animated: true)
        mapView.selectAnnotation(bar, animated: true)
    }
}