ProMotion-map

ProMotion-map provides a PM::MapScreen, extracted from the popular RubyMotion gem ProMotion.

Installation

gem 'ProMotion-map'

Usage

Easily create a map screen, complete with annotations.

Has all the methods of PM::Screen

class MyMapScreen < PM::MapScreen
  title "My Map"
  start_position latitude: 35.090648651123, longitude: -82.965972900391, radius: 4

  def annotation_data
    [{
      longitude: -82.965972900391,
      latitude: 35.090648651123,
      title: "Rainbow Falls",
      subtitle: "Nantahala National Forest",
      action: :show_forest
    },{
      longitude: -82.966093558105,
      latitude: 35.092520895652,
      title: "Turtleback Falls",
      subtitle: "Nantahala National Forest",
      action: :show_forest
    },{
      longitude: -82.95916,
      latitude: 35.07496,
      title: "Windy Falls",
      action: :show_forest
    },{
      longitude: -82.943031505056,
      latitude: 35.102516828489,
      title: "Upper Bearwallow Falls",
      subtitle: "Gorges State Park",
      action: :show_forest
    },{
      longitude: -82.956244328014,
      latitude: 35.085548421623,
      title: "Stairway Falls",
      subtitle: "Gorges State Park",
      your_param: "CustomWhatever",
      action: :show_forest
    }, {
      longitude: -82.965972900391,
      latitude: 35.090648651123,
      title: "Rainbow Falls",
      subtitle: "Nantahala National Forest",
      image: UIImage.imageNamed("custom-pin"),
      action: :show_forest
    }]
  end

  def show_forest
    selected = selected_annotations.first
    # Do something with the selected annotation.
  end
end

Here's a neat way to zoom into a specific marker in an animated fashion and then select the marker:

def zoom_to_marker(marker)
  set_region region(coordinate: marker.coordinate, span: [0.05, 0.05])
  select_annotation marker
end

Methods

annotation_data

Method that is called to get the map's annotation data and build the map. If you do not want any annotations, simply return an empty array.

All possible properties:

{
    longitude: -82.956244328014, # REQUIRED
    latitude: 35.085548421623, # REQUIRED
    title: "Stairway Falls", # REQUIRED
    subtitle: "Gorges State Park",
    image: "my_custom_image",
    left_accessory: my_button,
    right_accessory: my_other_button,
    action: :my_action, # Overrides :right_accessory
    action_button_type: UIButtonTypeContactAdd # Defaults to UIButtonTypeDetailDisclosure
}

You may pass whatever properties you want in the annotation hash, but :longitude, :latitude, and :title are required.

Use :image to specify a custom image. Pass in a string to conserve memory and it will be converted using UIImage.imageNamed(your_string). If you pass in a UIImage, we'll use that, but keep in mind that there will be another unnecessary copy of the UIImage in memory.

Use :left_accessory and :right_accessory to specify a custom accessory, like a button.

You can access annotation data you've arbitrarily stored in the hash by calling annotation_instance.params[:your_param].

The :action parameter specifies a method that should be run when the detail button is tapped on the annotation. It automatically adds a UIButtonTypeDetailDisclosure button to the :left_accessory. In your method you can find out which annotation's accessory was tapped by calling selected_annotations.first.

update_annotation_data

Forces a reload of all the annotations

annotations

Returns an array of all the annotations.

center

Returns a CLLocation2D instance with the center coordinates of the map.

center=(Float, longitude: Float, animated: Boolean)

Sets the center of the map. animated property defaults to true.

show_user_location

Shows the user's location on the map.

hide_user_location

Hides the user's location on the map.

showing_user_location?

Returns a Boolean of whether or not the map view is currently showing the user's location.

user_location

Returns a CLLocation2D object of the user's location or nil if the user location is not being tracked

zoom_to_user(radius = 0.05, animated=true)

Zooms to the user's location. If the user's location is not currently being shown on the map, it will show it first. radius is a CLLocationDegrees of the latitude and longitude deltas. See Apple documentation for MKCoordinateSpan for more information.

select_annotation(annotation, animated=true)

Selects a single annotation.

select_annotation_at(annotation_index, animated=true)

Selects a single annotation using the annotation at the index of your annotation_data array.

selected_annotations

Returns an array of annotations that are selected. If no annotations are selected, returns nil.

deselect_annotations(animated=false)

Deselects all selected annotations.

add_annotation(annotation)

Adds a new annotation to the map. Refer to annotation_data (above) for hash properties.

add_annotations(annotations)

Adds more than one annotation at a time to the map.

clear_annotations

Removes all annotations from the MapScreen.

zoom_to_fit_annotations(animated=true)

Changes the zoom and center point of the MapScreen to fit all the annotations.

set_region(region, animated=true)

Sets the region of the MapScreen. region should be an instance of MKCoordinateRegion.

region(params)

Helper method to create an MKCoordinateRegion. Expects a hash in the form of:

my_region = region({
  coordinate:{
    latitude: 35.0906,
    longitude: -82.965
  },
  # span is the latitude and longitude delta
  span: [0.5, 0.5]
})

Class Methods

start_position(latitude: Float, longitude: Float, radius: Float)

Class method to set the initial starting position of the MapScreen.

class MyMapScreen < PM::MapScreen
  start_position latitude: 36.10, longitude: -80.26, radius: 4
end

radius is the zoom level of the map in miles (default: 10).

Accessors

mapview

Reference to the created UIMapView.

Contributing

Fork it
Create your feature branch (git checkout -b my-new-feature)
Commit your changes (git commit -am 'Add some feature')
Make some specs pass
Push to the branch (git push origin my-new-feature)
Create new Pull Request