Ipad MKMapView未调用委托方法

我试图在地图上放置图钉，但它并没有调用委托方法

• （MKAnnotationView*）地图视图：（MKMapView*）地图视图注释：（id）注释{

我的应用程序是通用的，所以当我使用iPhone时，它会正确地调用委托方法，但当我使用iPad时，则不会调用委托方法。 代码如下：

• （MKAnnotationView*）地图视图：（MKMapView*）地图视图注释：（id）注释{
  静态NSString*标识符=@“MachineLocation”；
  if（[annotation IsKindof类：[MachineLocation类]]）{
  }
  返回nil；}

在viewWillApear代码下是这样的吗

NSString *tempString;
            for(NSMutableArray *array in appDelegate.globalVehicleInfoArray) { 
                for (VehicleInfo *vehicleInfo in array) {
                    for (WeatherCondition *weather in appDelegate.globalWeatherConditionArray) {
                        if ([weather.weatherID isEqualToString:[vehicleInfo vehicleID]]) {
                            tempString = [weather weatherTempC];
                            //                            NSLog(@"weather id matched");
                        }
                    }
                    NSString *name = [vehicleInfo vehicleName];
                    NSString *machineDescription = [NSString stringWithFormat:@"%@     %@ C", [vehicleInfo vehicleLastUpdate], tempString];
                    MKPointAnnotation *annotation = [[MKPointAnnotation alloc] init];
                    CLLocationCoordinate2D coordinate;
                    coordinate.latitude = [[vehicleInfo vehicleLastPositionY] doubleValue]; 
                    coordinate.longitude = [[vehicleInfo vehicleLastPositionX] doubleValue];
                    NSLog(@"%f , %f", coordinate.latitude, coordinate.longitude);
                    MachineLocation *location = [[MachineLocation alloc] initWithId:[vehicleInfo vehicleID] :name description:machineDescription coordinate:coordinate];
//                    annotation.coordinate = coordinate;
                    [self.mapView addAnnotation:location];
                }


            }

---

您是否为iPad使用单独的xib？地图视图是在xib中还是以编程方式创建的？代理插座是否在iPad的xib中正确连接？在iPad上，在view中，它是否实际通过循环并添加注释？注释是否显示为红色针脚？我收到了相同的错误，您是否找到了原因？我通过创建一个新类并在那里再次编写相同的代码来管理它。它对我很有用

NSString *tempString;
            for(NSMutableArray *array in appDelegate.globalVehicleInfoArray) { 
                for (VehicleInfo *vehicleInfo in array) {
                    for (WeatherCondition *weather in appDelegate.globalWeatherConditionArray) {
                        if ([weather.weatherID isEqualToString:[vehicleInfo vehicleID]]) {
                            tempString = [weather weatherTempC];
                            //                            NSLog(@"weather id matched");
                        }
                    }
                    NSString *name = [vehicleInfo vehicleName];
                    NSString *machineDescription = [NSString stringWithFormat:@"%@     %@ C", [vehicleInfo vehicleLastUpdate], tempString];
                    MKPointAnnotation *annotation = [[MKPointAnnotation alloc] init];
                    CLLocationCoordinate2D coordinate;
                    coordinate.latitude = [[vehicleInfo vehicleLastPositionY] doubleValue]; 
                    coordinate.longitude = [[vehicleInfo vehicleLastPositionX] doubleValue];
                    NSLog(@"%f , %f", coordinate.latitude, coordinate.longitude);
                    MachineLocation *location = [[MachineLocation alloc] initWithId:[vehicleInfo vehicleID] :name description:machineDescription coordinate:coordinate];
//                    annotation.coordinate = coordinate;
                    [self.mapView addAnnotation:location];
                }


            }