ArcGIS Runtime SDK for iOS如何自定义定位点实现位置偏移

【解决办法】：
要实现自定义控制定位点坐标，最关键的是实现自定义位置数据源。在自定义位置数据源类中实现
CLLocationManagerDelegate委托，进而通过委托方法来调整定位点信息。

具体参考代码：
1） CustomLocationDataSource.h

//



//  CustomLocaitonDataSource.h



//  CustomLocationDataSouce



//



//  Created by makl on 16/1/12.



//  Copyright (c) 2016年 Esri. All rights reserved.



//







#import <Foundation/Foundation.h>



#import <ArcGIS/ArcGIS.h>



@interface CustomLocaitonDataSource : NSObject<AGSLocationDisplayDataSource,CLLocationManagerDelegate>



@property(weak,nonatomic) id<AGSLocationDisplayDataSourceDelegate> delegate;



@property(strong, nonatomic,readonly) NSError* error;



@property(strong,nonatomic) CLLocationManager* locationManager;



@property(assign, nonatomic,getter = isStarted) BOOL started;



-(void)start;



-(void)stop;



@End

2)CustomLocationDataSource.m

//



//  CustomLocaitonDataSource.m



//  CustomLocationDataSouce



//



//  Created by makl on 16/1/12.



//  Copyright (c) 2016年 Esri. All rights reserved.



//







#import CustomLocaitonDataSource.h



#import <ArcGIS/ArcGIS.h>



#import <CoreLocation/CoreLocation.h>











@implementation CustomLocaitonDataSource











-(id)init{



    



    if(self = [super init]){



        



    self.locationManager = [[CLLocationManager alloc] init];



    



    self.locationManager.delegate = self;



    }



    



    return self;







}







- (void)locationManager:(CLLocationManager *)manager



    didUpdateToLocation:(CLLocation *)newLocation



           fromLocation:(CLLocation *)oldLocation{



    //CLLocation* newLL = newLocation;



   }







- (void)locationManager:(CLLocationManager *)manager



     didUpdateLocations:(NSArray *)locations{



    



    AGSLocation* location = [AGSLocation locationWithCLLocation:locations[0]];



    



    //实现客户化转换算法



    AGSPoint *verifyPoint = [AGSPoint pointWithX:location.point.x+10 y:location.point.y+10 spatialReference:[AGSSpatialReference spatialReferenceWithWKID:4326]];



    [location setPoint:verifyPoint];



    [self.delegate locationDisplayDataSource:self didUpdateWithLocation:location];







}







- (void)locationManager:(CLLocationManager *)manager



       didUpdateHeading:(CLHeading *)newHeading{



    



    [self.delegate locationDisplayDataSource:self didUpdateWithHeading:newHeading.trueHeading];



}











-(void)start{



    



    [self.locationManager startUpdatingHeading];



    [self.locationManager startUpdatingLocation];



    [self.delegate locationDisplayDataSourceStarted:self];



    



    self.started = true;



    



}







-(void)stop{



    



    [self.locationManager stopUpdatingHeading];



    [self.locationManager stopUpdatingLocation];



    [self.delegate locationDisplayDataSourceStopped:self];



    



    self.started = false;



}







@End

3) 位置开启

-(void) mapViewDidLoad:(AGSMapView*)mapView {



    



    CustomLocaitonDataSource* customLocaitonDataSource = [[CustomLocaitonDataSource alloc] init];



    self.mapView.locationDisplay.dataSource = customLocaitonDataSource;



    



    // Enable location display on the map



    [self.mapView.locationDisplay startDataSource];



    self.mapView.locationDisplay.autoPanMode = AGSLocationDisplayAutoPanModeDefault;



   



}