2020-01-03-howto地理文件gpx文件修改

howto地理文件gpx文件修改

基于KissXML对gpx文件进行修改

参考:

https://www.jianshu.com/p/4f7390cf710f
https://github.com/robbiehanson/KissXML
GPX（GPS eXchange Format，GPS交换格式）是一个XML格式，为应用软件设计的通用GPS数据格式，专门用来存储地理信息。
一个GPX文件当中可能包含一些路点（waypoint）及一些轨迹点（trackpoint）。 以全球定位系统（GPS设备）所产生的GPX档为例， 路点可能是各自独立互不相干的重要标记点， 例如照相的地点或用户手动标记的休息站或路口等等；
至于GPS设备自动定时记录的则是轨迹点。 有顺序的一串轨迹点构成一个轨迹（track）或者路程（route）。轨迹是一个人曾经走过的记录，可能包含走错的路等等；路程则经常是建议未来用路人可以走的路径。
所以，一般来讲，轨迹里的点，包含时间信息，路程里的点，则没有时间信息。

代码:

usage

打包 KissXML.framework 并加入工程
#import <KissXML/KissXML.h>
#import "YTRoutePoint.h"
主要代码
route_app_id是gpx文件的文件名
NSArray *a1rr = [self readGPXFileToPoints:[NSString stringWithFormat:@"%@/IDmoniLocation.gpx", NSHomeDirectory()] route_app_id:@"IDmoniLocation"];
NSMutableArray *a2rr = [NSMutableArray new];
NSLog(@"%@", a1rr);
for (YTRoutePoint *po1nt in a1rr) {
    YTRoutePoint *po2nt = [YTRoutePoint new];
    po2nt.lon = 1 + po1nt.lon;
    po2nt.lat = 1 + po1nt.lat;
    [a2rr addObject:po2nt];
}
[self writeXmlDocumentCallbackPath:@"IDmoniLocation" with:a2rr];

read write API函数

- (NSArray *)readGPXFileToPoints:(NSString *)filePath route_app_id:(NSString *)route_app_id
{
    //转成XML字符串
    NSString *xmlString = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];
    DDXMLDocument *xmlDoc = [[DDXMLDocument alloc]initWithXMLString:xmlString options:0 error:nil];
    //开始解析
    NSArray *children = [xmlDoc nodesForXPath:@"gpx/wpt" error:nil];
    NSMutableArray *points = [NSMutableArray arrayWithCapacity:children.count];
    //遍历每个元素
    YTRoutePoint *prevPoint = nil;
    for (DDXMLElement *child in children) {
        @autoreleasepool {
            NSString *lat =[[child attributeForName:@"lat"] stringValue];
            NSString *lon =[[child attributeForName:@"lon"] stringValue];
            DDXMLElement *speedEle = [child elementForName:@"speed"];
            DDXMLElement *timeEle = [child elementForName:@"time"];
            DDXMLElement *distacneEle = [child elementForName:@"distacne"];
            DDXMLElement *levelEle = [child elementForName:@"level"];
            DDXMLElement *slopeEle = [child elementForName:@"slope"];
            YTRoutePoint *point = [[YTRoutePoint alloc]init];
            point.route_app_id = route_app_id;
            point.lon = [lon doubleValue];
            point.lat = [lat doubleValue];
            point.speed = [[speedEle stringValue] doubleValue];
            point.altude = [[levelEle stringValue] doubleValue];
            point.distance = [[distacneEle stringValue] doubleValue];
            point.slope = [[slopeEle stringValue] doubleValue];
            point.create_time = [[timeEle stringValue] integerValue];
            //去重
            if(!prevPoint) {
                [points addObject:point];
                prevPoint = point;
            }
            else {
                if(prevPoint.lat == point.lat && prevPoint.lon == point.lon) {
                    continue;
                }
                [points addObject:point];
                prevPoint = point;
            }
        }
    }
    return [NSArray arrayWithArray:points];
}
- (NSString *)writeXmlDocumentCallbackPath:(NSString *)route_app_id with:(NSArray *)trackRoute
{
    //gpx（root根）
    DDXMLElement *gpxElement = [[DDXMLElement alloc]initWithName:@"gpx"];
//    DDXMLNode *gpxUserID = [DDXMLNode attributeWithName:@"userid" stringValue:[[DataManagerObject shareDataManagerObject] getWildtoID]];
//    [gpxElement addAttribute:gpxUserID];
//    DDXMLNode *gpxUserName = [DDXMLNode attributeWithName:@"nickname" stringValue:[[DataManagerObject shareDataManagerObject] getUserNickName]];
//    [gpxElement addAttribute:gpxUserName];
//    DDXMLNode *gpxDevice = [DDXMLNode attributeWithName:@"device" stringValue:[UIDevice machineModelName]];
//    [gpxElement addAttribute:gpxDevice];
//    DDXMLNode *gpxVersion = [DDXMLNode attributeWithName:@"appversion" stringValue:YTAPPVersion];
//    [gpxElement addAttribute:gpxVersion];
//    DDXMLNode *gpxChannel = [DDXMLNode attributeWithName:@"channel" stringValue:@"wildto"];
//    [gpxElement addAttribute:gpxChannel];
//    DDXMLNode *gpxClient = [DDXMLNode attributeWithName:@"client" stringValue:YT_IOS_DEVICE];
//    [gpxElement addAttribute:gpxClient];
    NSArray *points = trackRoute;
    for (NSInteger i = 0; i < points.count; i ++) {
        @autoreleasepool {
            YTRoutePoint *point = points[i];
            //wpt元素（包含经纬度两个属性）
            DDXMLElement *wptElement = [[DDXMLElement alloc]initWithName:@"wpt"];
            DDXMLNode *wptLonAtt = [DDXMLNode attributeWithName:@"lon" stringValue:[NSString stringWithFormat:@"%f",point.lon]];
            [wptElement addAttribute:wptLonAtt];
            DDXMLNode *wptLatAtt = [DDXMLNode attributeWithName:@"lat" stringValue:[NSString stringWithFormat:@"%f",point.lat]];
            [wptElement addAttribute:wptLatAtt];
            //速度
            DDXMLElement *speedElement = [[DDXMLElement alloc]initWithName:@"speed" stringValue:[NSString stringWithFormat:@"%f",point.speed]];
            [wptElement addChild:speedElement];
            //海拔
            DDXMLElement *altudeElement = [[DDXMLElement alloc]initWithName:@"level" stringValue:[NSString stringWithFormat:@"%f",point.altude]];
            [wptElement addChild:altudeElement];
            //时间点（时间戳）
            DDXMLElement *creatTimeElement = [[DDXMLElement alloc]initWithName:@"time" stringValue:[NSString stringWithFormat:@"%ld",(long)point.create_time]];
            [wptElement addChild:creatTimeElement];
            //坡度
            DDXMLElement *slopeElement = [[DDXMLElement alloc]initWithName:@"slope" stringValue:[NSString stringWithFormat:@"%f",point.slope]];
            [wptElement addChild:slopeElement];
            //当前点经过的总距离
            DDXMLElement *distacneElement = [[DDXMLElement alloc]initWithName:@"distacne" stringValue:[NSString stringWithFormat:@"%.1f",point.distance]];
            [wptElement addChild:distacneElement];
            [gpxElement addChild:wptElement];
        }
    }
    NSString *xmlString = [@"<?xml version=\"1.0\"?>" stringByAppendingString:[gpxElement XMLString]];
    NSLog(@"xmlString  %@",xmlString);
    DDXMLDocument *xmlDocument = [[DDXMLDocument alloc]initWithXMLString:xmlString options:0 error:nil];
    NSString *path = [NSString stringWithFormat:@"%@/%@.gpx", NSHomeDirectory(), route_app_id];
    NSLog(@"路劲 == %@",path);
    NSString *result = [NSString stringWithFormat:@"%@",xmlDocument];
    BOOL writed = [result writeToFile:path atomically:YES encoding:NSUTF8StringEncoding error:nil];
    if (writed) {
        return path;
    }
    return nil;
}

YTRoutePoint.h

#import <Foundation/Foundation.h>
#import <CoreLocation/CLLocation.h>
#import <CoreLocation/CLPlacemark.h>
NS_ASSUME_NONNULL_BEGIN
@interface YTRoutePoint : NSObject
@property (nonatomic, strong) NSString *route_app_id;
@property (nonatomic, assign) double lon;
@property (nonatomic, assign) double lat;
@property (nonatomic, assign) double speed;
@property (nonatomic, assign) double altude;
@property (nonatomic, assign) double distance;
@property (nonatomic, assign) double slope;
@property (nonatomic, assign) NSInteger create_time;
@end
NS_ASSUME_NONNULL_END

YTRoutePoint.m

#import "YTRoutePoint.h"
@implementation YTRoutePoint
- (instancetype)initWithDictionary:(NSDictionary *)dict {
    if (self = [super init]) {
        _route_app_id = [dict objectForKey:@"route_app_id"];
        _lon = [[dict objectForKey:@"lon"] doubleValue];
        _lat = [[dict objectForKey:@"lat"] doubleValue];
        _speed = [[dict objectForKey:@"speed"] doubleValue];
        _altude = [[dict objectForKey:@"altude"] doubleValue];
        _distance = [[dict objectForKey:@"distance"] doubleValue];
        _slope = [[dict objectForKey:@"slope"] doubleValue];
        _create_time = [[dict objectForKey:@"create_time"] integerValue];
        return self;
    } else
        return nil;
}
@end