iOS的高德地图标注特定位置

在开发时有时候遇到项目里面需要展示公司的位置，这时如果导入百度地图什么的就太浪费资源，而且还占内存

这时只要调用自动高德地图的就行了

自己写一个控制器，导入框架

现在导入系统框架只要多打次就能出来了，没必要去link添加

#import "MapViewCtl.h"
#import <CoreLocation/CoreLocation.h>
#import <MapKit/MapKit.h>

//获取屏幕 宽度、高度
#define SCREEN_WIDTH ([UIScreen mainScreen].bounds.size.width)
#define SCREEN_HEIGHT ([UIScreen mainScreen].bounds.size.height)

@interface MapViewCtl ()<MKMapViewDelegate>
{
    MKMapView *mapView;
}
@property (nonatomic, readwrite) CLLocationCoordinate2D coordinate;
@end

@implementation MapViewCtl

- (void)viewDidLoad {
    [super viewDidLoad];
    mapView = [[MKMapView alloc]initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT)];

    mapView.mapType = MKMapTypeStandard;
    
    CLLocationCoordinate2D location = CLLocationCoordinate2DMake(22, 111);//纬度，经度
    float zoomLevel = 0.01;
    MKCoordinateRegion region = MKCoordinateRegionMake(location, MKCoordinateSpanMake(zoomLevel, zoomLevel));
    [mapView setRegion:[mapView regionThatFits:region] animated:YES];
    [self.view addSubview:mapView];
    
    MKPointAnnotation *pointAnn = [[MKPointAnnotation alloc]init];
    pointAnn.coordinate = location;
    pointAnn.title = @"某某有限公司";
    pointAnn.subtitle = @"某某地址";
    [mapView addAnnotation:pointAnn];
    [mapView selectAnnotation:pointAnn animated:YES];
    
}

如果不知道怎么查经纬度的，可以参考这个 http://www.doc88.com/p-3157554808098.html

获取到的经纬度是  （经度，纬度），填到 

CLLocationCoordinate2DMake(22, 111)时，要倒过来填  （纬度，经度）