[BMKGradient generateColorMap:resultColorMap:]: unrecognized selector sent to...

Sian

[BMKGradient generateColorMap:resultColorMap:]: unrecognized selector sent to instance 0x7fae64f32260

如题，这么恶心的一个问题，找了好久，百度上也找不到相关答案，最后还是问Google问出来的！

解决方案是在Build Settings--Linking--[Other Linker Flags]中添加一个“-ObjC”,即可搞定！

附加百度添加热力图的demo方法：

[Objective-C] 纯文本查看 复制代码

    BMKHeatMap* heatMap = [[BMKHeatMap alloc] init];
    NSMutableArray* data = [NSMutableArray array];
    int num = 1000;
    for(int i = 0; i<num; i++)
    {
        //创建BMKHeatMapNode
        BMKHeatMapNode* heapmapnode_test = [[BMKHeatMapNode alloc] init];
        //此处示例为随机生成的坐标点序列，开发者使用自有数据即可
        CLLocationCoordinate2D coor;
        float random = (arc4random()%1000)*0.001;
        float random2 = (arc4random()%1000)*0.003;
        float random3 = (arc4random()%1000)*0.015;
        float random4 = (arc4random()%1000)*0.016;
        if(i%2==0){
            coor.latitude = 39.915+random;
            coor.longitude = 116.403+random2;
        }else{
            coor.latitude = 39.915-random3;
            coor.longitude = 116.403-random4;
        }
        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
    heatMap.mData = data;
    //调用mapView中的方法根据热力图数据添加热力图
    [self.mapView addHeatMap:heatMap];