//创建蜂窝热力图数据类
BMKHexagonHeatMap *heatHexagonMap = [[BMKHexagonHeatMap alloc] init];
//读取数据
NSData *jsonData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"multPoints" ofType:@"json"]];
NSArray *array = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:nil];
//创建热力图数据数组
NSMutableArray *data = [NSMutableArray array];
if (jsonData) {
    for (NSDictionary *dic in array) {
        //创建BMKHeatMapNode
        BMKHexagonHeatMapNode *heapmapnode_test = [[BMKHexagonHeatMapNode alloc] init];
        CLLocationCoordinate2D coor;
        coor.latitude = [dic[@"lat"] doubleValue];
        coor.longitude = [dic[@"lng"] doubleValue];
        heapmapnode_test.pt = coor;
        //随机生成点强度
        heapmapnode_test.intensity = arc4random() % 900;
        //添加BMKHeatMapNode到数组
        [data addObject:heapmapnode_test];
    }
}
//将点数据赋值到热力图数据类
heatHexagonMap.mData = data;
heatHexagonMap.mRadius = 5000;
heatHexagonMap.mMaxIntensity = 1800;
heatHexagonMap.mGap = 100;
heatHexagonMap.mHexagonType = BMKHexagonTypeVertexUp;
BMKGradient *graident = [[BMKGradient alloc] initWithColors:@[[UIColor blueColor], [UIColor redColor], [UIColor greenColor]] startPoints:@[@0.08, @0.4, @1.0]];
heatHexagonMap.mGradient = graident;
//调用mapView中的方法根据热力图数据添加热力图
[self.mapView addHexagonHeatMap:heatHexagonMap];

[
    {"lng": 116.895579, "lat": 24.306521},
    {"lng": 113.951068, "lat": 22.772504},
    …
    {"lng": 110.00006, "lat": 40.603564},
    {"lng": 111.846788, "lat": 21.897821}
    ]