CODEWITHSUNDEEP
iosgoogle-maps
Xavi Valero
Xavi Valero

Reputation: 2057

Setting map centre and zoom to fit all coordinates

I am using google map for iOS. I have a set of coordinates. Among them I want to set one of the coordinates as the center of the map, irrespective of the zoom level. I am able to fit all the coordinates in the frame at the same time, using GMSCameraUpdate fitBounds. But how can I set a particular coordinate as centre all the time and also fit rest of the coordinates in the frame.

What I have tried is to create GMSCoordinateBounds, included all the coordinates and set fit bounds

[myMapview animateWithCameraUpdate:[GMSCameraUpdate fitBounds:bounds withPadding:20.0f]];

But what I want is the map view should zoom in such a way that, this particular coordinate should be the exact centre while all other coordinates are also included in the frame.

Upvotes: 3

Views: 3062

Answers (3)

Mannam Brahmaiah
Mannam Brahmaiah

Reputation: 2283

Can you please see the following code. I hope it will be helpful to you

The intend is to set the boundaries of the map to focus on all the markers. enter image description here

The ‘GMSMapView‘ class used to have a method ‘markers‘ which returned all the markers, but its now deprecated. So, you will have to keep track of the markers added to the map.

Assuming that you have the following:

GMSMapView *mapView;
NSMutableArray *markers;

and all the markers are add to the NSMutableArray “markers”.

- (void)ShowAllMarkers
{
CLLocationCoordinate2D firstLocation = ((GMSMarker *)markers.firstObject).position;
GMSCoordinateBounds *bounds = [[GMSCoordinateBounds alloc] initWithCoordinate:firstLocation coordinate:firstLocation];

for (GMSMarker *marker in markers) {
    bounds = [bounds includingCoordinate:marker.position];
}

[mapView animateWithCameraUpdate:[GMSCameraUpdate fitBounds:bounds withPadding:50.0f]];
}

enter image description here

Upvotes: 0

Daniyar
Daniyar

Reputation: 3003

All you need is to create right GMSCoordinatedBounds object. Say you have a number of points which you need to be fitted by map camera and the center point.

First you need to find the most far point from the center. Then calculate an extra point far' opposite to one you've found. It would look like this

(far)---------(center)---------(far')

To do so just use simple +/- operations with latitudes and longitudes of far and center coordinates.

Far and far' will be exact two points the bounds required.

Upvotes: 0

Jogendra.Com
Jogendra.Com

Reputation: 6454

You need to store all map point in GMSCoordinateBounds using like this

GMSCoordinateBounds* bounds =  [[GMSCoordinateBounds alloc]  init  ];
CLLocationCoordinate2D position = CLLocationCoordinate2DMake(26.00, 75.00);
bounds = [bounds includingCoordinate:position];

Store all position using same type code . Adding all GMSCoordinateBounds position use with map 

[myMapview animateWithCameraUpdate:[GMSCameraUpdate fitBounds:bounds]];
//myMapview = this is object of your google map.

Upvotes: 1

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