Map kit

Jan 11, 2013Download as pptx, pdf

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This document provides an overview and instructions for using MapKit to display maps and add location-based functionality to iPhone applications. It discusses adding the MapKit and CoreLocation frameworks, setting the map region and position, adding annotations to mark points of interest, using geocoding to convert between addresses and coordinates, and interacting with the user's location via Core Location.

Intro to the MapKit
Code Review: 3/30/12

The Plan
? What is MapKit?

? Adding MapKit to your iPhone Application

? Setting the Position

? Annotations

? Geocoding

? Interacting with Core Location

Most read

What is MapKit?
? Embed Maps in your App

? Based on Google Maps

Adding MapKit to your App
? Add the Mapkit & CoreLocation frameworks

? Create a View Controller which implements MKMapViewDelegate

? Create an MKMapView instance and connect to the controller

Setting the Position
? Set the region property

? Define the center point and a span

? Span defines the vertical & horizontal distance to display (zoom)
- (void)viewDidLoad?{? MKCoordinateRegion region;? region.center.latitude = [eventVenue.latitude doubleValue
}

Annotations
? Allow you to add places-of-interest to a Map

? Implemented with a Model & a View

? Only limited by amount of free memory on the device

Annotation Models
? Implement the MKAnnotation protocol

? Exposes a Title, Subtitle, and Coordinate

Title

Subtitle

Coordinate

Annotation Views
? Use MKAnnotationView

? Easiest trick to set the image property

? Use MKPinAnnotationView if you want the Pin

? If you don��t need a specific image, it��s best to just use the Pin.

? NB: Pin has 3 different colors: Red (which is the default for indicating a
location), Green (for indicating the start point), and Purple (which is user
defined).

Managing Annotation Views
- (MKAnnotationView *)mapView:(MKMapView *)theMapView
viewForAnnotation:(id <MKAnnotation>)annotation?{? MKPinAnnotationView *annotationView =
(MKPinAnnotationView *)([theMapView
dequeueReusableAnnotationViewWithIdentifier:@"annotation"]);? ? if (annotationView == NULL)? {? annotationView
= [[[MKPinAnnotationView alloc]
initWithAnnotation:annotation reuseIdentifier:@"annotation"] autorelease];? annotationView.canShowCallout = YES;?
annotationView.animatesDrop = YES;? }?? annotationView.annotation = annotation;? return annotationView;?}

Geocoding
? Convert Landmarks into Longitude/Latitude?and vice-versa

? SDK 3.0+ Supports Reverse Geocoding only

? For forward geocoding, you can use services like Google or Yahoo

Reverse Geocoding
? Use MKReverseGeocoder

? Requires network access (Wifi/3G/EDGE)

? Asynchronous lookups

Interacting with Core Location
? Set the showsUserLocation property on the MapView instance

? Implement an Annotation

? Setting showsUserLocation to YES enables it (so you��ll get CL authorization
pop-ups)
- (void)viewDidLoad?{
// Other initialisation��

mapView.showsUserLocation = YES;
}

Showing the User��s Location
- (MKAnnotationView *)mapView:(MKMapView *)theMapView
viewForAnnotation:(id <MKAnnotation>)annotation?{? // Checks to see if we
are going to add the annotation for the users's location.? // If this is the case, then we
don't bother with creating an annotation and let? // the platform give us the blue
dot.? if (annotation == mapView.userLocation) return nil;?
// Configuring other annotations��?}

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Map kit

1. Intro to the MapKit Code Review: 3/30/12

2. The Plan ? What is MapKit? ? Adding MapKit to your iPhone Application ? Setting the Position ? Annotations ? Geocoding ? Interacting with Core Location

3. What is MapKit? ? Embed Maps in your App ? Based on Google Maps

4. Adding MapKit to your App ? Add the Mapkit & CoreLocation frameworks ? Create a View Controller which implements MKMapViewDelegate ? Create an MKMapView instance and connect to the controller

5. Setting the Position ? Set the region property ? Define the center point and a span ? Span defines the vertical & horizontal distance to display (zoom) - (void)viewDidLoad?{? MKCoordinateRegion region;? region.center.latitude = [eventVenue.latitude doubleValue }

6. Annotations ? Allow you to add places-of-interest to a Map ? Implemented with a Model & a View ? Only limited by amount of free memory on the device

7. Annotation Models ? Implement the MKAnnotation protocol ? Exposes a Title, Subtitle, and Coordinate Title Subtitle Coordinate

8. Annotation Views ? Use MKAnnotationView ? Easiest trick to set the image property ? Use MKPinAnnotationView if you want the Pin ? If you don��t need a specific image, it��s best to just use the Pin. ? NB: Pin has 3 different colors: Red (which is the default for indicating a location), Green (for indicating the start point), and Purple (which is user defined).

9. Managing Annotation Views - (MKAnnotationView *)mapView:(MKMapView *)theMapView viewForAnnotation:(id <MKAnnotation>)annotation?{? MKPinAnnotationView *annotationView = (MKPinAnnotationView *)([theMapView dequeueReusableAnnotationViewWithIdentifier:@"annotation"]);? ? if (annotationView == NULL)? {? annotationView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"annotation"] autorelease];? annotationView.canShowCallout = YES;? annotationView.animatesDrop = YES;? }?? annotationView.annotation = annotation;? return annotationView;?}

10. Geocoding ? Convert Landmarks into Longitude/Latitude?and vice-versa ? SDK 3.0+ Supports Reverse Geocoding only ? For forward geocoding, you can use services like Google or Yahoo

11. Reverse Geocoding ? Use MKReverseGeocoder ? Requires network access (Wifi/3G/EDGE) ? Asynchronous lookups

12. Interacting with Core Location ? Set the showsUserLocation property on the MapView instance ? Implement an Annotation ? Setting showsUserLocation to YES enables it (so you��ll get CL authorization pop-ups) - (void)viewDidLoad?{ // Other initialisation�� mapView.showsUserLocation = YES; }

13. Showing the User��s Location - (MKAnnotationView *)mapView:(MKMapView *)theMapView viewForAnnotation:(id <MKAnnotation>)annotation?{? // Checks to see if we are going to add the annotation for the users's location.? // If this is the case, then we don't bother with creating an annotation and let? // the platform give us the blue dot.? if (annotation == mapView.userLocation) return nil;? // Configuring other annotations��?}

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