记录一下今天的地图代码,火星坐标和地球坐标的问题

//
//  ViewController.m
//  mapLearning
//
//  Created by Jin on 2016/12/6.
//  Copyright © 2016年 Jin. All rights reserved.
//

#import "ViewController.h"
#import <MapKit/MapKit.h>
#import <CoreLocation/CoreLocation.h>
#import "JMLocationTransformer.h"
#define SCREEN_WIDTH [UIScreen mainScreen].bounds.size.width
#define SCREEN_HEIGHT [UIScreen mainScreen].bounds.size.height

@interface ViewController () <MKMapViewDelegate>

@property (nonatomic, strong) MKMapView *mapView;
@property (nonatomic, strong) CLLocationManager *manager;
@property (nonatomic, strong) UILabel *placeMarkerLabel;
@property (nonatomic, strong) UILabel *lonAndLatLabel;

@end

@implementation ViewController

- (UILabel *)lonAndLatLabel {
    if (!_lonAndLatLabel) {
        _lonAndLatLabel = [[UILabel alloc]initWithFrame:CGRectMake(8,SCREEN_HEIGHT - 76, SCREEN_WIDTH - 16, 30)];
        _lonAndLatLabel.backgroundColor = [UIColor whiteColor];
    }
    return _lonAndLatLabel;
}

- (UILabel *)placeMarkerLabel {
    if (!_placeMarkerLabel) {
        _placeMarkerLabel = [[UILabel alloc]initWithFrame:CGRectMake(8,SCREEN_HEIGHT - 38, SCREEN_WIDTH - 16, 30)];
        _placeMarkerLabel.backgroundColor = [UIColor whiteColor];
    }
    return _placeMarkerLabel;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    
    UIView *view = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 10, 10)];
    view.center = self.view.center;
    view.backgroundColor = [UIColor redColor];
    view.layer.masksToBounds = YES;
    view.layer.cornerRadius = 5.0f;
    
    self.mapView = [[MKMapView alloc]initWithFrame:self.view.bounds];
    self.mapView.delegate = self;
    [self.view addSubview:self.mapView];
    [self.mapView addSubview:self.lonAndLatLabel];
    [self.mapView addSubview:self.placeMarkerLabel];
    
    [self.view addSubview:view];

    self.manager = [[CLLocationManager alloc]init];
    [self.manager requestAlwaysAuthorization];
    [self.manager requestWhenInUseAuthorization];
    
    self.mapView.userTrackingMode = MKUserTrackingModeFollow;
//    CGPoint point = [self.mapView convertCoordinate:self.mapView.centerCoordinate toPointToView:self.mapView];
//    NSLog(@"Point = (%f,%f)",point.x,point.y);
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated {
    CLLocationCoordinate2D centerCoordinate = mapView.region.center;
    
    CLLocation *centerLocation = [[CLLocation alloc]initWithLatitude:centerCoordinate.latitude longitude:centerCoordinate.longitude];
//    self.lonAndLatLabel.text = [NSString stringWithFormat:@"longitude = %f,latitude = %f",centerCoordinate.longitude,centerCoordinate.latitude];
    
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    // 反地理编码；根据经纬度查找地名
    [geocoder reverseGeocodeLocation:centerLocation completionHandler:^(NSArray *placemarks, NSError *error) {
        if (placemarks.count == 0 || error) {
            NSLog(@"error");
            return;
        }
        CLPlacemark *pm = [placemarks firstObject];
        self.lonAndLatLabel.text = [NSString stringWithFormat:@"原生地标%@",pm.name];
    }];
    
    CLLocationCoordinate2D transformCoordinate = [JMLocationTransformer transformFromWGSToGCJ:centerCoordinate];
    CLLocation *transformLocation = [[CLLocation alloc]initWithLatitude:transformCoordinate.latitude longitude:transformCoordinate.longitude];
    
    CLGeocoder *geocoder1 = [[CLGeocoder alloc] init];
    // 反地理编码；根据经纬度查找地名
    [geocoder1 reverseGeocodeLocation:transformLocation completionHandler:^(NSArray *placemarks, NSError *error) {
        if (placemarks.count == 0 || error) {
            NSLog(@"error");
            return;
        }
        CLPlacemark *pm = [placemarks firstObject];
        self.placeMarkerLabel.text = [NSString stringWithFormat:@"转换地标%@",pm.name];
    }];
    
//    self.placeMarkerLabel.text = [NSString stringWithFormat:@"longitude = %f,latitude = %f",transformCoordinate.longitude,transformCoordinate.latitude];
}

/*
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation {
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    
    // 反地理编码；根据经纬度查找地名
    [geocoder reverseGeocodeLocation:userLocation.location completionHandler:^(NSArray *placemarks, NSError *error) {
        if (placemarks.count == 0 || error) {
            NSLog(@"找不到该位置");
            return;
        }
        
        // 当前地标
        CLPlacemark *pm = [placemarks firstObject];
        
        // 区域名称
        userLocation.title = pm.locality;
        // 详细名称
        userLocation.subtitle = pm.name;
    }];
}
*/
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end