UICGDirectionsDelegate函数未在iphone中调用

我在iphone的mapView中显示了从起点到终点的路线，我完成了。但一天后我打开了这个项目，它没有显示路线，因为没有调用UICGDirectionsDelegate函数。我不知道为什么会发生这种情况，请一些机构指导我关于这个问题。非常感谢，我的示例代码在这里`

- (void)viewDidLoad
{
    [super viewDidLoad];

    // Do any additional setup after loading the view from its nib.
    if (diretions.isInitialized) {
        [self update];
    }

    routeOverlayView = [[UICRouteOverlayMapView alloc] initWithMapView:mapViews];

    diretions = [UICGDirections sharedDirections];
    diretions.delegate = self;

}



- (IBAction)backButton:(id)sender {

    [self.navigationController popViewControllerAnimated:YES];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}

- (void)update {
    [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];

    UICGDirectionsOptions *options = [[UICGDirectionsOptions alloc] init];
    options.travelMode = travelMode;

    if (is_route) {

        startPoint = [NSString stringWithFormat:@"%f,%f",APPDELEGATE.user_latitude,APPDELEGATE.user_longitude];
        endPoint = [NSString stringWithFormat:@"%@,%@",routeObj.latitude,routeObj.longitude];
        destination = poiObj.english_title;

    }else {
        startPoint = [NSString stringWithFormat:@"%f,%f",APPDELEGATE.user_latitude,APPDELEGATE.user_longitude];
        endPoint = [NSString stringWithFormat:@"%@ ,%@",poiObj.latitude,poiObj.longitude];
        destination = routeObj.starting_poi_name;
    }


    [diretions loadWithStartPoint:startPoint endPoint:endPoint options:options];

}

- (void)moveToCurrentLocation:(id)sender {
    [mapViews setCenterCoordinate:[mapViews.userLocation coordinate] animated:YES];
}

- (void)addPinAnnotation:(id)sender {
    UICRouteAnnotation *pinAnnotation = [[UICRouteAnnotation alloc] initWithCoordinate:[mapViews centerCoordinate]
                                                                                 title:nil
                                                                        annotationType:UICRouteAnnotationTypeWayPoint];
    [mapViews addAnnotation:pinAnnotation];
}



#pragma mark <UICGDirectionsDelegate> Methods

- (void)directionsDidFinishInitialize:(UICGDirections *)directions {
    [self update];
}

- (void)directions:(UICGDirections *)directions didFailInitializeWithError:(NSError *)error {
    [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];

    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Map Directions" message:[error localizedFailureReason] delegate:nil cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
    [alertView show];
}

- (void)directionsDidUpdateDirections:(UICGDirections *)directions {
    [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];

    // Overlay polylines
    UICGPolyline *polyline = [directions polyline];
    NSArray *routePoints = [polyline routePoints];
    [routeOverlayView setRoutes:routePoints];

    // Add annotations
    currentLocation = @"You are here";
    UICRouteAnnotation *startAnnotation = [[UICRouteAnnotation alloc] initWithCoordinate:[[routePoints objectAtIndex:0] coordinate]
                                                                                   title:currentLocation
                                                                          annotationType:UICRouteAnnotationTypeStart];
    UICRouteAnnotation *endAnnotation = [[UICRouteAnnotation alloc] initWithCoordinate:[[routePoints lastObject] coordinate]
                                                                                 title:destination
                                                                        annotationType:UICRouteAnnotationTypeEnd];

    [mapViews addAnnotations:[NSArray arrayWithObjects:startAnnotation, endAnnotation, nil]];
}



- (void)directions:(UICGDirections *)directions didFailWithMessage:(NSString *)message {
    [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Map Directions" message:message delegate:nil cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
    [alertView show];
}
`  

-（void）viewDidLoad
{
[超级视图下载]；
//从nib加载视图后，执行任何其他设置。
if（方向初始化）{
[自我更新]；
}
routeOverlayView=[[UICROUTEOVERLAYMPVIEW alloc]initWithMapView:MAPVIEW]；
方向=[UICGDirections sharedDirections]；
diretions.delegate=self；
}
-（iAction）backButton:（id）发送方{
[self.navigationController PopViewControllerInitiated:是]；
}
-（无效）未收到记忆警告{
[超级记忆警告]；
}
-（作废）更新{
[[UIApplication sharedApplication]设置网络活动指示器可见：是]；
UICGDirectionsOptions*选项=[[UICGDirectionsOptions alloc]init]；
options.travelMode=travelMode；
如果（是路线）{
startPoint=[NSString stringWithFormat:@“%f，%f”，APPDELEGATE.user_纬度，APPDELEGATE.user_经度]；
端点=[NSString stringWithFormat:@“%@，%@”，路由北京纬度，路由北京经度]；
目的地=poiObj.english\u标题；
}否则{
startPoint=[NSString stringWithFormat:@“%f，%f”，APPDELEGATE.user_纬度，APPDELEGATE.user_经度]；
端点=[NSString stringWithFormat:@“%@，%@”，poiObj.纬度，poiObj.经度]；
destination=routeObj.starting_poi_name；
}
[diretions loadWithStartPoint:startPoint endPoint:endPoint options:options]；
}
-（无效）移动到当前位置：（id）发件人{
[mapViews setCenterCoordinate:[mapViews.userLocation坐标]动画：是]；
}
-（无效）addPinAnnotation:（id）发件人{
UICROUTEANNOTIONATION*PINANOTIONATION=[[UICROUTEANNOTIONATION alloc]initWithCoordinate:[地图视图中心坐标]
标题：无
注释类型：UICROUTEANNOTIONTYPEWAYPOINT]；
[地图视图添加注释：pinAnnotation]；
}
#pragma标记方法
-（无效）方向DidFinishInitialize:（UICGDirections*）方向{
[自我更新]；
}
-（无效）方向：（UICGDirections*）方向初始化失败错误：（N错误*）错误{
[[UIApplication sharedApplication]设置网络活动指示器可见：否]；
UIAlertView*alertView=[[UIAlertView alloc]initWithTitle:@“地图方向”消息：[错误本地化失败原因]委托：无取消按钮：无其他按钮：无确定，无]；
[警报视图显示]；
}
-（void）方向DidUpdateDirections:（UICGDirections*）方向{
[[UIApplication sharedApplication]设置网络活动指示器可见：否]；
//重叠多段线
UICG多段线*多段线=[方向多段线]；
NSArray*路由点=[多段线路由点]；
[routeOverlayView设置路由：路由点]；
//添加注释
currentLocation=@“您在这里”；
UICroudentAnnotation*StartAnotation=[[UICroudentAnnotation alloc]initWithCoordinate:[[routePoints objectAtIndex:0]坐标]
标题：当前位置
注释类型：uicroutAnnotationTypeStart]；
UICroudeTanotation*endAnnotation=[[UICroudeTanotation alloc]initWithCoordinate:[[routePoints lastObject]坐标]
标题：目的地
注释类型：uicroutAnnotationTypeEnd]；
[mapViews addAnnotations:[NSArray arrayWithObjects:StartAnotation，endAnnotation，nil]；
}
-（void）方向：（UICGDirections*）方向DIDFILIWITHMESSAGE:（NSString*）消息{
[[UIApplication sharedApplication]设置网络活动指示器可见：否]；
UIAlertView*alertView=[[UIAlertView alloc]initWithTitle:@“地图方向”消息：消息委托：无取消按钮：无其他按钮：无确定，无]；
[警报视图显示]；
}
`  

在UICGRoute.m中

替换这个

NSArray *stepDics;
NSDictionary *k;
for (int i = 0; i<allKeys.count; i++) {
k = [dictionaryRepresentation objectForKey:[allKeys objectAtIndex:i]];
if ([k objectForKey:@"Steps"]) {
stepDics = [k objectForKey:@"Steps"];
break;
}
}

NSDictionary *k = [dictionaryRepresentation objectForKey:[allKeys objectAtIndex:[allKeys count] - 1]];
NSArray *stepDics = [k objectForKey:@"Steps"];