由於專案需要，需要通過百度地圖sdk實現軌跡回放。

使用一個非常簡單的辦法來實現軌跡回放。

話不多說，出來吧，程式碼君。

1，使用的是BMKPointAnnotation。

@interface TrackMapViewController (){
    BMKPointAnnotation * pointAnnotation;
}

2，通過伺服器回傳值，繪製行駛路徑軌跡

  CLLocationCoordinate2D start_coor[steparray.count];
            
            
            for (int i = 0; i<steparray.count;i++) {
                start_coor[i].latitude = [[[steparray objectAtIndex:i]objectForKey:@"lat"] floatValue];
                start_coor[i].longitude = [[[steparray objectAtIndex:i]objectForKey:@"lon"] floatValue];
                
            }
            
            [mapView setCenterCoordinate:start_coor[0]];
            
            
            BMKPolyline * polyline = [BMKPolyline polylineWithCoordinates:start_coor count:steparray.count];
            [mapView addOverlay:polyline];
            
            pointAnnotation = [[BMKPointAnnotation alloc]init];
            
            pointAnnotation.coordinate = start_coor[0];
            pointAnnotation.title = @"起點";
            [mapView addAnnotation:pointAnnotation];
 

        timer =[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(playTrack) userInfo:nil repeats:YES];

#pragma mark - 動畫
-(void)playTrack{
    
    if (timeCount<steparray.count) {
        
        CLLocationCoordinate2D start_coor;
        start_coor.latitude = [[[steparray objectAtIndex:timeCount]objectForKey:@"lat"] floatValue];
        start_coor.longitude = [[[steparray objectAtIndex:timeCount]objectForKey:@"lon"] floatValue];
        
        timeCount = timeCount++;
        
        pointAnnotation.title = @"軌跡";
        pointAnnotation.coordinate = start_coor;
        
        
        [mapView setCenterCoordinate:start_coor];
    }
    else
    {
        [timer invalidate];
        
       [[[UIAlertView alloc]initWithTitle:@"提示" message:@"播放結束" delegate:self cancelButtonTitle:@"我知道了" otherButtonTitles:nil, nil]show];
    }
    
}