Working with Apple Map Bubble

Operating system requirements: iOS 5.0 or later.

Mobile device: iPad.

Description

This example retrieves information about Apple map bubble.

Bubble identifier.
Name.
Displayed bubble name.
Bubble size, and also minimum and maximum size.
Bubble fill brush.
Bubble location coordinates.

Required Files

It is required to add the following file to the base example Displaying of Express Report:

CustomMapDataBubbleViewController.h/.mm. Class implementing a protocol for working with Apple map data source.

Source Code

Executing the example requires to create a class implementing a protocol for working with Apple map data source, and also to add a class header file into source code of the ViewController class (see the Displaying of Express Report section). The it is required to place the following code in the body of the executeExample method of the ViewController class:

// Get express report controller
MAExpressAnalysisReportViewController *contr = (MAExpressAnalysisReportViewController *)m_controller;
// Get express report delegate
EAReportDelegateImpl *delegate = [contr delegate];
// Get map data source
MapDataViewDatasource *dataSource = (MapDataViewDatasource *)[delegate mapDatasource];
// Create an Apple map controller
CustomMapDataBubbleViewController *bubbleViewController = [[CustomMapDataBubbleViewController alloc] initWithDatasource: dataSource];
// Get identifiers of Apple map bubbles
NSArray *allShapeIds = [bubbleViewController allShapeIDs];
NSLog(@"Number of map bubbles: %d", [allShapeIds count]);
NSLog(@"Minimum radius of map bubbles: %f", [bubbleViewController minSize]);
NSLog(@"Maximum radius of map bubbles: %f", [bubbleViewController maxSize]);
if ([allShapeIds count] > 0) {
    // Get identifier of the first map bubble
    NSString *shapeId = [allShapeIds objectAtIndex: 0];
    MapShape *mapShape = [bubbleViewController shapeWithID: shapeId];
    NSLog(@"Bubble identifier: %@", [mapShape ID]);
    // Get bubble name
    NSString *shapeName = [bubbleViewController nameWithID: shapeId];
    NSLog(@"Bubble name: %@", shapeName);
    
    [bubbleViewController setValue:[NSNumber numberWithInt:0] forKey:@"m_index"];
    // Get displayed bubble name
    NSString *shapeCaption = [bubbleViewController captionWithID: shapeId];
    NSLog(@"Displayed name of map bubble: %@", shapeCaption);
    // Get bubble coordinates by identifier
    CLLocationCoordinate2D location = [bubbleViewController locationWithID: shapeId];
    NSLog(@"Latitude corresponding to bubble: %f", location.latitude);
    NSLog(@"Longitude corresponding to bubble: %f", location.longitude);
    // Get bubble fill brush
    Brush *brush = [bubbleViewController brushWithID: shapeId];
    // Determine brush color as a hexadecimal string
    const CGFloat *colorComponents = CGColorGetComponents([[brush mainColor] CGColor]);
    CGFloat r = colorComponents[0];
    CGFloat g = colorComponents[1];
    CGFloat b = colorComponents[2];
    NSString *hexString=[NSString stringWithFormat:@"%02X%02X%02X", (int)(r * 255), (int)(g * 255), (int)(b * 255)];
    NSLog(@"Bubble fill color: %@", hexString);
    // Get bubble size
    double size = [bubbleViewController sizeWithID: shapeId];
    NSLog(@"Bubble size: %f", size);
} else {
    NSLog(@"No bubbles on map");
}

After executing the example the development environment console displays information about the first Apple map bubble:

Number of map bubbles: 42

Minimum radius of map bubbles: 0.000000

Maximum radius of map bubbles: 0.000000

Bubble identifier: GL

Bubble name: Greenland

Displayed name of map bubble: Greenland

GDP per capita growth (annual %)

Latitude corresponding to bubble: 76.126060

Longitude corresponding to bubble: -42.246990

Bubble fill color: F0F0F0

Bubble size: 20.000000