iOS-GPX-Parser/GPXParser.m at master · krystofcelba/iOS-GPX-Parser · GitHub

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//
//  GPXParser.m
//  Databáze letišť
//
//  Created by Krystof Celba on 20.03.12.
//  Copyright (c) 2012 __MyCompanyName__. All rights reserved.
//

#import "GPXParser.h"
#import "TBXML.h"
#import "GPXWaypointAnnotation.h"
#import "GPXTrackPolyLine.h"
#import "UIColor+named.h"


@implementation GPXParser

-(id) initWithGPXFile: (NSString *) file
{
	if (self = [super init]) {
		tbxml = [TBXML tbxmlWithXMLFile:file error:nil];
	}
	return self;
}

-(NSArray *) getWaypoints
{
	NSMutableArray *wpts = [[NSMutableArray alloc] init];
    TBXMLElement *root = tbxml.rootXMLElement;
    if (root)
	{
		TBXMLElement *wpt = [TBXML childElementNamed:@"wpt" parentElement:root];
		while (wpt)
		{
			TBXMLElement *nameEl = [TBXML childElementNamed:@"name" parentElement:wpt];
			TBXMLElement *descEl = [TBXML childElementNamed:@"desc" parentElement:wpt];
			TBXMLElement *symEl = [TBXML childElementNamed:@"sym" parentElement:wpt];

			NSString *lat = [TBXML valueOfAttributeNamed:@"lat" forElement:wpt];
			NSString *lon = [TBXML valueOfAttributeNamed:@"lon" forElement:wpt];
			NSString *name = @"";
			if (nameEl)
			{
				name = [TBXML textForElement:nameEl];
			}
			NSString *desc;
			if (descEl)
			{
				desc = [TBXML textForElement:descEl];
			}
			NSString *image = @"";
			if (symEl)
			{
				image = [[TBXML textForElement:symEl] stringByReplacingOccurrencesOfString:@" " withString:@"_"];
			}

			GPXWaypointAnnotation *ann = [[GPXWaypointAnnotation alloc] initWithName:name desc:desc coordinate:CLLocationCoordinate2DMake([lat doubleValue], [lon doubleValue])];
			ann.imageName = image;
			[wpts addObject:ann];

			wpt = [TBXML nextSiblingNamed:@"wpt" searchFromElement:wpt];
        }
    }

	return wpts;
}


-(NSArray *) getTracks
{
	NSMutableArray *tracks = [[NSMutableArray alloc] init];
    TBXMLElement *root = tbxml.rootXMLElement;
    if (root)
	{
		TBXMLElement *trk = [TBXML childElementNamed:@"trk" parentElement:root];
		while (trk)
		{
			//[self traverseElement:trk];
			TBXMLElement *nameEl = [TBXML childElementNamed:@"name" parentElement:trk];
			TBXMLElement *segEl = [TBXML childElementNamed:@"trkseg" parentElement:trk];
			TBXMLElement *extEl = [TBXML childElementNamed:@"gpxx:TrackExtension" parentElement:[TBXML childElementNamed:@"extensions" parentElement:trk]];
			NSString *name = @"";
			if (nameEl)
			{
				name = [TBXML textForElement:nameEl];
			}

			UIColor *color = nil;
			if (extEl)
			{
				TBXMLElement *colorEl = [TBXML childElementNamed:@"gpxx:DisplayColor" parentElement:extEl];
				if (colorEl)
				{
					color = [UIColor colorNamed:[TBXML textForElement:colorEl]];
				}
			}
			NSMutableArray *trackPoints = [[NSMutableArray alloc] init];
			if (segEl)
			{
				TBXMLElement *pointEl = [TBXML childElementNamed:@"trkpt" parentElement:segEl];
				while (pointEl)
				{
					NSString *lat = [TBXML valueOfAttributeNamed:@"lat" forElement:pointEl];
					NSString *lon = [TBXML valueOfAttributeNamed:@"lon" forElement:pointEl];

					CLLocation *loc = [[CLLocation alloc] initWithLatitude:[lat floatValue] longitude:[lon floatValue]];
					[trackPoints addObject:loc];
					pointEl = [TBXML nextSiblingNamed:@"trkpt" searchFromElement:pointEl];
				}


				CLLocationCoordinate2D coords[[trackPoints count]];
				for(int i = 0; i < trackPoints.count; i++)
				{
					CLLocation* location = [trackPoints objectAtIndex:i];
					CLLocationCoordinate2D c;
					c.latitude = location.coordinate.latitude;
					c.longitude = location.coordinate.longitude;
					coords[i] = c;
				}
				GPXTrackPolyLine *poly = (GPXTrackPolyLine *)[GPXTrackPolyLine polylineWithCoordinates:coords count:trackPoints.count];
				poly.color = [UIColor redColor];
				if (color)
				{
					poly.color = color;
				}
				poly.title = name;
				[tracks addObject:poly];
			}
			trk = [TBXML nextSiblingNamed:@"trk" searchFromElement:trk];
        }
    }

	return tracks;
}

@end