//百度地图线条绘制：
[BMKPolyline setPolylineWithCoordinates:coor count:count];
//动画：
[UIView animateWithDuration:node.distance/30/timeFloat animations:^{
    currentIndex++;
    BMKSportNode *node = [sportNodes objectAtIndex:currentIndex ];
    BMKPointAnnotation.coordinate = node.coordinate;
} completion:^(BOOL finished) {
    //循环
}];