iPhone 版 Mapkit 上的多个注释

Question

有谁知道如何使用数据库在地图上显示多个位置？

我试图在数据库的帮助下在谷歌地图上删除多个图钉，但只能删除最后一个图钉

Answer 1

Below is the function which i m using to fill array with the help of Database


RecipieAppDelegate *appDelegate = (RecipieAppDelegate *)[[UIApplication sharedApplication] delegate];
    [appDelegate getallrecords];
    self.namesArray=appDelegate.rs;
    ///filling array with database
        for (int i=0; i<namesArray.count; i++) {
        Food *product = (Food *)[self.namesArray objectAtIndex:i];
        NSLog(@"%d",i);
        appDelegate.mylatitude=product.Latitude;
        appDelegate.mylongitude=product.Longitude;
     /// this function is use to call the class which is use to drop pin on map 
     BridgeAnnotation *BridgePin = [[BridgeAnnotation alloc] init];
     [self.mapAnnotations insertObject:BridgePin atIndex:kBridgeAnnotationIndex];
     [BridgePin release];

    }


/////CLASS BRIDGE ANNOTATION   below is the function getting cordinate from above function n droping pin    
    - (CLLocationCoordinate2D)coordinate;
    {
        RecipieAppDelegate *appDelegate = (RecipieAppDelegate *)[[UIApplication sharedApplication] delegate];
        Food *product;
        CLLocationCoordinate2D theCoordinate;
    //  theCoordinate.latitude = 37.810000;
    //  theCoordinate.longitude = -122.477989;
        theCoordinate.latitude = [appDelegate.mylatitude doubleValue];
        NSLog(@"%f",    theCoordinate.latitude);
        theCoordinate.longitude = [appDelegate.mylongitude doubleValue];
        NSLog(@"%f",    theCoordinate.longitude);
        return theCoordinate; 
    }

好吧，我在数组上完美运行循环 5 次，但它将最后一个值传递给第二个函数

等待您回复