新的家园

在前一篇记录了使用Unity编写高德定位及地理围栏的插件，下面介绍一下iOS。 复制一份高德的示例工程officialDemoLoc(省了配置工程，和引用库文件),创建AMapHelper类文件（.h和.mm）,头文件主要包含AMapHelper单例类，和导出的几个方法,如下：

#import <Foundation/Foundation.h>
#import <AMapLocationKit/AMapLocationKit.h>
#import "IUnityInterface.h"

#if defined(__cplusplus)
extern "C"{
#endif
    extern void UnitySendMessage(const char *, const char *, const char *);
#if defined(__cplusplus)
}
#endif

extern "C" void    UNITY\_INTERFACE\_EXPORT UNITY\_INTERFACE\_API MAMapUnityStartLocation(const char * apiKey);
extern "C" void    UNITY\_INTERFACE\_EXPORT UNITY\_INTERFACE\_API MAMapUnityStopLocation();
extern "C" void    UNITY\_INTERFACE\_EXPORT UNITY\_INTERFACE\_API MAMapUnityStartGeoFence(const char * jsonString);
extern "C" void    UNITY\_INTERFACE\_EXPORT UNITY\_INTERFACE\_API MAMapUnityStopGeoFence();
extern "C" bool    UNITY\_INTERFACE\_EXPORT UNITY\_INTERFACE\_API MAMapUnityContainsCoordinate(double lat,double lng);


@interface AMapHelper : NSObject<AMapLocationManagerDelegate,AMapGeoFenceManagerDelegate>

@property (nonatomic, strong) AMapLocationManager *locationManager;
//@property (nonatomic, strong) AMapGeoFenceManager *geoFenceManager;
@property (nonatomic, strong) AMapLocationRegion *locationRegion;

\+ (instancetype)sharedInstance;

@end

定位和围栏

\- (void)startLocation:(NSString *)apiKey{
    \[\[AMapServices sharedServices\] setApiKey:apiKey\];

    \[self configLocationManager\];
    //开始进行连续定位
    \[self.locationManager startUpdatingLocation\];
}

-(void)stopLocation{
    //停止定位
    \[self.locationManager stopUpdatingLocation\];
}

-(void)startGeoFence:(NSString*)jsonStr{
    NSError *error = nil;
    NSData *data =  \[jsonStr dataUsingEncoding: NSUTF8StringEncoding\];
    id jsonObject = \[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error\];

    NSString *customId;
    CLLocationCoordinate2D *coorArr;
    if (\[jsonObject isKindOfClass:\[NSDictionary class\]\]) {
        NSDictionary \*dict = (NSDictionary\*)jsonObject;
        customId = \[dict valueForKey:@"customId"\];
        NSArray *pointList =\[dict valueForKey:@"customId"\];

        long count = \[pointList count\];
        coorArr = (CLLocationCoordinate2D*)malloc(sizeof(CLLocationCoordinate2D) * count);
        for(int i = 0;i<\[pointList count\];i++){
            NSDictionary*item = \[pointList objectAtIndex:i\];
            double lat = \[\[item objectForKey:@"latitude"\] doubleValue\];
            double lng = \[\[item objectForKey:@"longitude"\] doubleValue\];
            coorArr\[i\] = CLLocationCoordinate2DMake(lat, lng);
        }

        self.locationRegion = \[\[AMapLocationPolygonRegion alloc\] initWithCoordinates:coorArr count:count identifier:customId\];
        //开始
        \[self.locationManager startMonitoringForRegion:self.locationRegion\];

        free(coorArr);
    }
}

-(void)stopGeoFence{
    \[self.locationManager stopMonitoringForRegion:_locationRegion\];
}

导出函数实现：

extern "C" void    UNITY\_INTERFACE\_EXPORT UNITY\_INTERFACE\_API MAMapUnityStartLocation(const char * apiKey){
    \[\[AMapHelper sharedInstance\] startLocation:\[NSString stringWithUTF8String:apiKey\]\];
}

extern "C" void    UNITY\_INTERFACE\_EXPORT UNITY\_INTERFACE\_API MAMapUnityStopLocation(){
\[\[AMapHelper sharedInstance\] stopLocation\];
}

extern "C" void    UNITY\_INTERFACE\_EXPORT UNITY\_INTERFACE\_API MAMapUnityStartGeoFence(const char * jsonString){
    \[\[AMapHelper sharedInstance\] startGeoFence:\[NSString stringWithUTF8String:jsonString\]\];
}

extern "C" void    UNITY\_INTERFACE\_EXPORT UNITY\_INTERFACE\_API MAMapUnityStopGeoFence(){
    \[\[AMapHelper sharedInstance\] stopGeoFence\];
}

extern "C" bool    UNITY\_INTERFACE\_EXPORT UNITY\_INTERFACE\_API MAMapUnityContainsCoordinate(double lat,double lng){
    return \[\[AMapHelper sharedInstance\] containsCoordinate:lat lng:lng\];
}

将两个文件复制到Unity工程目录，保存在Plugins/iOS目录下，iOS可以在Plugins下任意目录，也可以有多个iOS目录。 Unity下调用iOS方法:

#elif UNITY_IOS
        \[DllImport ("__Internal")\]
        private static extern void MAMapUnityStartLocation (string apiKey);

        \[DllImport ("__Internal")\]
        private static extern void MAMapUnityStopLocation ();

        \[DllImport ("__Internal")\]
        private static extern void MAMapUnityStartGeoFence(string jsonString);

        \[DllImport ("__Internal")\]
        private static extern void MAMapUnityStopGeoFence ();

        \[DllImport ("__Internal")\]
        private static extern bool MAMapUnityContainsCoordinate(double lat,double lng);

        public void StartLocation(string apiKey)
        {
            MAMapUnityStartLocation(apiKey);
        }

        public void StopLocation()
        {
            MAMapUnityStopLocation();
        }

        public void StartGeoFence(string jsonString)
        {
            MAMapUnityStartGeoFence(jsonString);
        }

        public void StopGeoFence()
        {
            MAMapUnityStopGeoFence();
        }
#endif

使用方式和方法和Android相同。功能基本实现，性能及精度还有待优化。

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