iOS解析GeoPoints& MapBox形状

问题描述

所以我想知道如何使用MapBox检索解析坐标并绘制形状.

So i am wondering how to go about retrieving Parse coordinates and drawing a shape using MapBox.

我可以检索坐标并分别绘制坐标(使用 PARSE )可以的地图:

I can retrieve the coordinates and plot them individually (using PARSE) on a map fine:

PFQuery *locationQuery = [PFQuery queryWithClassName:@"Location"];
[locationQuery whereKeyExists:@"location"];
locationQuery.cachePolicy = kPFCachePolicyNetworkElseCache;
[locationQuery findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
    if (!error) {
        // The find succeeded.
        NSLog(@"Successfully retrieved %lu scores.", (unsigned long)objects.count);
        NSLog(@"Object is %@ and %@", [objects objectAtIndex:0],[objects objectAtIndex:1]);

        for (PFObject *gp in objects) {

            //How to get PFGeoPoint and then a location out of an object
            PFGeoPoint *location = [gp objectForKey:@"location"];

            NSLog(@"Hi there my name is: %f", location.latitude);

            CLLocationCoordinate2D coordinate = CLLocationCoordinate2DMake(location.latitude, location.longitude);

            //This is how to populate the data with a title
            NSString *title = [NSString stringWithFormat:@"%@", gp.createdAt];

            RMPointAnnotation *annotation3 = [[RMPointAnnotation alloc] initWithMapView:mapView coordinate:coordinate andTitle:title];
            [mapView addAnnotation:annotation3];

        }

    } else {
        // Log details of the failure
        NSLog(@"Error: %@ %@", error, [error userInfo]);
    }
}];

为地图添加形状(使用 MapBox )也是可行的:

Adding a shape to a map (using MapBox) is doable as well:

//Line for streets location arrays, etc MapBox
    NSArray *locations = [NSArray arrayWithObjects:[[CLLocation alloc] initWithLatitude:-33.980852 longitude:151.072498],
                          [[CLLocation alloc] initWithLatitude:-33.981769 longitude:151.072300],
                          [[CLLocation alloc] initWithLatitude:-33.982018 longitude:151.072257],
                          [[CLLocation alloc] initWithLatitude:-33.982187 longitude:151.072225], nil, nil];

    RMAnnotation *annoation43 = [[RMAnnotation alloc] initWithMapView:mapView coordinate:((CLLocation *)[locations

objectAtIndex:0]).coordinate andTitle:@"Hola biatches！"];

objectAtIndex:0]).coordinate andTitle:@"Hola biatches!"];

    annoation43.userInfo = locations;
    [annoation43 setBoundingBoxFromLocations:locations];
    [mapView addAnnotation:annoation43];
    NSLog(@"It is working Dora!");

-(RMMapLayer *)mapView:(RMMapView *)mapViewer layerForAnnotation:(RMAnnotation *)annotation {

    if (annotation.isUserLocationAnnotation)
        return nil;

    RMShape *shape = [[RMShape alloc] initWithView:mapView];

    //Line dashes and colours and widths, etc
    shape.lineColor = [UIColor orangeColor];
    shape.lineWidth = 4.0;
    shape.scaleLineWidth = YES;
    shape.scaleLineDash = YES;
    shape.lineDashLengths = [NSArray arrayWithObjects:[NSNumber numberWithInt:4], [NSNumber numberWithInt:6], nil];
    shape.lineDashPhase = 3.0f;



    for (CLLocation *location in (NSArray *)annotation.userInfo)
        [shape addLineToCoordinate:location.coordinate];

    return shape;


}

我想知道如何让MapBox从这些坐标绘制形状?我做了几次尝试，却一无所获，所以比我有更好头脑的人将不胜感激.如果您需要更多信息，请告诉我.

I am wondering how i would get MapBox to draw a shape from these coordinates? I have had a few attempts and am getting nowhere so someone with a better mind than i would be greatly appreciated. If you need any more information let me know.

推荐答案

我知道了-我尝试的解决方案很好-我在循环内初始化数组，因此每次都在重新创建数组，所以覆盖每个新坐标，并尝试仅使用一个坐标绘制形状.

I figured it out - my solution i was attempting was fine - i was initialising the array WITHIN the loop and so it was recreating the array each time and so was overwriting each new coordinate and trying to draw a shape using only one coordinate.

PFQuery *locationQuery2 = [PFQuery queryWithClassName:@"Location"];
    [locationQuery2 whereKeyExists:@"location"];
    locationQuery2.limit = 4;
    locationQuery2.cachePolicy = kPFCachePolicyNetworkElseCache;
    [locationQuery2 findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        if (!error) {
            // The find succeeded.
            NSLog(@"Successfully retrieved %lu scores.", (unsigned long)objects.count);
            NSLog(@"Object is %@ and %@", [objects objectAtIndex:0],[objects objectAtIndex:1]);
            NSMutableArray *locations = [[[NSMutableArray alloc] init] mutableCopy];

            for (PFObject *gp in objects) {

                //How to get PFGeoPoint and then a location out of an object
                PFGeoPoint *location = [gp objectForKey:@"location"];

                NSLog(@"Hi there my name is not: %f", location.latitude);

                CLLocation *coordinate = [[CLLocation alloc] initWithLatitude:location.latitude longitude:location.longitude];

                //Line for streets location arrays, etc MapBox
                [locations addObject:coordinate];

                RMAnnotation *annoation43 = [[RMAnnotation alloc] initWithMapView:mapView coordinate:((CLLocation *)[locations objectAtIndex:0]).coordinate andTitle:@"Hola biatches!"];

                annoation43.userInfo = locations;
                [annoation43 setBoundingBoxFromLocations:locations];
                [mapView addAnnotation:annoation43];
                NSLog(@"It is working Dora!");


                NSLog(@"Yeah its is: %@", locations);
            }

        } else {
            // Log details of the failure
            NSLog(@"Error: %@ %@", error, [error userInfo]);
        }
    }];

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