Created
March 26, 2015 22:30
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Sample code from an iOS project using Swift and open data.
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| // | |
| // ViewController.swift | |
| // RaleighCrime | |
| // | |
| // Created by David Curtis on 3/15/15. | |
| // Copyright (c) 2015 David Curtis. All rights reserved. | |
| // | |
| import UIKit | |
| import Foundation | |
| import MapKit | |
| import CoreLocation | |
| class ViewController: UIViewController, MKMapViewDelegate { | |
| @IBOutlet weak var mapView: MKMapView! | |
| override func viewDidLoad() { | |
| super.viewDidLoad() | |
| resetMap() | |
| } | |
| func resetMap(){ | |
| // Clear all annotations first | |
| let annotationsToRemove = mapView.annotations | |
| mapView.removeAnnotations(annotationsToRemove) | |
| // Set starting point of map: downtown Raleigh | |
| var latitude:CLLocationDegrees = 35.779632 | |
| var longitude:CLLocationDegrees = -78.638094 | |
| // Zoom level | |
| var latDelta:CLLocationDegrees = 0.09 | |
| var longDelta:CLLocationDegrees = 0.09 | |
| var span:MKCoordinateSpan = MKCoordinateSpanMake(latDelta, longDelta) | |
| var location:CLLocationCoordinate2D = CLLocationCoordinate2DMake(latitude, longitude) | |
| var region:MKCoordinateRegion = MKCoordinateRegionMake(location, span) | |
| mapView.setRegion(region, animated: true) | |
| var annotation = MKPointAnnotation() | |
| annotation.coordinate = location | |
| annotation.title = "Raleigh" | |
| annotation.subtitle = "North Carolina" | |
| mapView.addAnnotation(annotation) | |
| } | |
| override func didReceiveMemoryWarning() { | |
| super.didReceiveMemoryWarning() | |
| // Dispose of any resources that can be recreated. | |
| } | |
| func retrieveJsonFromData(data: NSData) -> AnyObject?{ | |
| var error : NSError? | |
| let jsonObject : AnyObject? = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.AllowFragments, error: &error) | |
| if error == nil { | |
| println("Successfully deserialized") | |
| if jsonObject is NSDictionary{ | |
| let deserializedDictionary = jsonObject as NSDictionary | |
| println("Deserialized JSON Dictionary = \(deserializedDictionary)") | |
| } | |
| else if jsonObject is NSArray{ | |
| let deserialzedArray = jsonObject as NSArray | |
| // println("Deserialzed JSON Array = \(deserialzedArray[0])") | |
| return deserialzedArray | |
| } | |
| else{ | |
| println("None") | |
| } | |
| } else if error != nil { | |
| println("An error happened while deserializing JSON data") | |
| } | |
| return nil | |
| } | |
| @IBAction func buttonClick(sender: AnyObject) { | |
| //click here to select crime button on home pg | |
| } | |
| @IBOutlet weak var selectCrimeButton: UIButton! | |
| @IBAction func cancelToMainViewController(segue:UIStoryboardPopoverSegue) { | |
| } | |
| @IBAction func clearMap(segue:UIStoryboardSegue){ | |
| resetMap() | |
| selectCrimeButton.setTitle("Click Here to Select Crime", forState: nil) | |
| } | |
| @IBAction func murder(segue:UIStoryboardSegue){ | |
| resetMap() | |
| getCrime("lcr=11") | |
| selectCrimeButton.setTitle("Murder", forState: nil) | |
| } | |
| @IBAction func sexOffenses(segue:UIStoryboardSegue){ | |
| resetMap() | |
| getCrime("lcr=17A") //forcible rape | |
| getCrime("lcr=21") // rape by force | |
| getCrime("lcr=22") // rape attempted | |
| selectCrimeButton.setTitle("Rape", forState: nil) | |
| } | |
| @IBAction func allCrimes(segue:UIStoryboardSegue){ | |
| resetMap() | |
| getCrime("") | |
| selectCrimeButton.setTitle("All Crimes", forState: nil) | |
| } | |
| @IBAction func robbery(segue:UIStoryboardSegue){ | |
| resetMap() | |
| getCrime("lcr=20A") | |
| getCrime("lcr=20B") | |
| selectCrimeButton.setTitle("Robbery", forState: nil) | |
| } | |
| @IBAction func burglary(segue:UIStoryboardSegue){ | |
| resetMap() | |
| getCrime("lcr=30A") | |
| getCrime("lcr=30B") | |
| selectCrimeButton.setTitle("Burglary", forState: nil) | |
| } | |
| @IBAction func assaultFirearm(segue:UIStoryboardSegue){ | |
| resetMap() | |
| getCrime("lcr=25A") // firearm | |
| getCrime("lcr=41") // firearm | |
| getCrime("lcr=A41") // assault LEO firearm | |
| selectCrimeButton.setTitle("Assault with Firearm", forState: nil) | |
| } | |
| func getCrime(newQuery:String) { | |
| var query = newQuery | |
| var url = NSURL(string: "https://data.raleighnc.gov/resource/csw9-dd5k.json?\(query)") | |
| let request = NSURLRequest(URL: url!) | |
| NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue()) { (response, data, error) -> Void in | |
| let parsedObject: AnyObject? = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.AllowFragments, error: nil) | |
| var newData: AnyObject? = self.retrieveJsonFromData(data) | |
| var latitudes : [NSString] = [] | |
| var longitudes : [NSString] = [] | |
| var dates : [NSString] = [] | |
| var descriptions : [NSString] = [] | |
| var dataDictionary = newData? as NSArray | |
| var length = dataDictionary.count - 1 | |
| let formatter = NSDateFormatter() | |
| formatter.dateStyle = NSDateFormatterStyle.LongStyle | |
| formatter.timeStyle = NSDateFormatterStyle.MediumStyle | |
| for index in 0...length { | |
| if var location = dataDictionary[index]["location"] as? NSDictionary{ | |
| latitudes.append(location["latitude"] as NSString) | |
| longitudes.append(location["longitude"] as NSString) | |
| } | |
| if var date = dataDictionary[index]["inc_datetime"] as? NSString { | |
| // println(date) | |
| dates.append(date) | |
| } | |
| if var description = dataDictionary[index]["lcr_desc"] as? NSString { | |
| descriptions.append(description) | |
| } | |
| } | |
| var newDateFormat : [NSString] = [] | |
| var newTimeFormat : [NSString] = [] | |
| var datesLength = dates.count - 1 | |
| for index in 0...datesLength { | |
| var formattedDate = self.reformatDate(dates[index]) | |
| var formattedTime = self.reformatTime(dates[index]) | |
| newDateFormat.append(formattedDate) | |
| newTimeFormat.append(formattedTime) | |
| } | |
| var latDelta:CLLocationDegrees = 0.09 | |
| var longDelta:CLLocationDegrees = 0.09 | |
| var span:MKCoordinateSpan = MKCoordinateSpanMake(latDelta, longDelta) | |
| var arrayLength = latitudes.count - 1 | |
| for index in 0...arrayLength { | |
| var newLat:CLLocationDegrees = latitudes[index].doubleValue | |
| var newLong:CLLocationDegrees = longitudes[index].doubleValue | |
| var newLocation:CLLocationCoordinate2D = CLLocationCoordinate2DMake(newLat, newLong) | |
| var annotation = MKPointAnnotation() | |
| annotation.coordinate = newLocation | |
| annotation.title = "\(newDateFormat[index]) at \(newTimeFormat[index])" | |
| // annotation.subtitle = newTimeFormat[index] | |
| annotation.subtitle = descriptions[index] | |
| self.mapView.addAnnotation(annotation) | |
| } | |
| } | |
| } | |
| func reformatDate(date: NSString) -> NSString { | |
| var newDate = date.substringToIndex(10) | |
| return newDate | |
| } | |
| func reformatTime(time: NSString) -> NSString { | |
| let range1:NSRange = NSMakeRange(11, 5) | |
| var newTime = time.substringWithRange(range1) | |
| return newTime | |
| } | |
| } | |
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