第一步、创建项目，下载GMSMap

1.打开终端，进入项目所在文件夹，进入到xxxx.xcodeproj的这一层文件夹
2.终端输入 vim Podfile 回车

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3.查看可使用的谷歌地图。终端输入pod search GoogleMaps

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将pod 'GoogleMaps', '~> 1.13.0'这一句复制到刚才的Podfile中

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4.下载谷歌地图。终端输入命令 pod install

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这里，谷歌地图已经下载到项目中。
下面我们看项目中配置。

第二步、项目配置和使用

1.申请app key

https://developers.google.com/maps/ios/
首先你有一个谷歌账户，然后点链接。

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点击获取秘钥，然后就是创建项目。

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这里就得到了谷歌地图的秘钥appkey

2.项目中使用秘钥appkey

首先，确保项目Bundle identifier 跟刚才填写的标识符一样。

屏幕快照 2016-08-22 17.45.12.png

然后在appDelegate.m中定义一下秘钥的宏和头文件

#import "AppDelegate.h"
#import <GoogleMaps/GoogleMaps.h>

#define GMSAppKey @"AIzaSyAiv_qJnJncFa8bmi8C6Vtc15ZAxwLNL4E"

@interface AppDelegate ()

@end

@implementation AppDelegate

然后在- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)方法中使用申请的appkey

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
     [GMSServices provideAPIKey:GMSAppKey];
    return YES;
}

3.使用地图

为了方便，这里直接在viewController里使用地图了。
引入头文件，加入地图代理，定义一个地图对象

#import <UIKit/UIKit.h>
#import <GoogleMaps/GoogleMaps.h>
@interface ViewController : UIViewController<GMSMapViewDelegate>{
    GMSMapView *mapview;
}

@end

初始化一下地图

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    [self initWithMaps];
};
-(void)initWithMaps{
    GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:22.5539403923
                                                            longitude:113.9463173915
                                                                 zoom:15];
    mapview = [GMSMapView mapWithFrame:CGRectZero camera:camera];
    self.view=mapview;
    mapview.delegate=self;
    
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

效果是这个样子

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第三步、使用谷歌地图的其他功能

1.添加maker

-(void)addAMaker{
    GMSMarker *marker = [[GMSMarker alloc] init];
    marker.position = CLLocationCoordinate2DMake(22.5539403923, 113.9463173915);
    marker.title = @"深圳";
    marker.snippet = @"This is a maker";
    marker.map = mapview;
//    marker.icon = [UIImage imageNamed:@"bluePoint.png"];marker的图标
    
}

效果

屏幕快照 2016-08-22 18.11.45.png

2.得到经纬度的地址

-(void)getAddress{
    GMSMarker *marker = [[GMSMarker alloc] init];
    marker.position = CLLocationCoordinate2DMake(23.5539403923, 113.9463173915);
    marker.title = @"深圳";
    marker.snippet = @"This is a maker";
    marker.map = mapview;
    [[GMSGeocoder geocoder] reverseGeocodeCoordinate:CLLocationCoordinate2DMake(23.5539403923, 113.9463173915) completionHandler:^(GMSReverseGeocodeResponse* response, NSError* error) {
        for(GMSAddress* addressObj in [response results])
        {
            
            marker.title=[NSString stringWithFormat:@"%@,%@",addressObj.thoroughfare,addressObj.subLocality];
            marker.snippet=[NSString stringWithFormat:@"%@,%@,%@",addressObj.locality,addressObj.administrativeArea,addressObj.country];
        }
    }];
}

效果

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