How to add a button on the Google maps in iOS?

Question

I am new to iOS Programming and I have downloaded the google maps sdk for iOS and followed the instruction on their website ( as shown in this link https://developers.google.com

Answer 1

GMSMapView is subclass of UIView so you can add subviews as to any other view

Try this code

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button.frame = CGRectMake(mapView_.bounds.size.width - 110, mapView_.bounds.size.height - 30, 100, 20);
button.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleTopMargin;
[button setTitle:@"Button" forState:UIControlStateNormal];
[mapView_ addSubview:button];

It adds 100x20 button as the subview of the GMSMapView, positioned to the bottom right corner. I have tested it and the button can be touched as in any other view

Edit: Also move all your code from -loadView to -viewDidLoad. -loadView method is never called when using IB to create UI. Docs to -loadView says:

If you use Interface Builder to create your views and initialize the view controller, you must not override this method.

Edit 2: I believe when you create view hierarchy using Interface Builder, you CAN NOT reset self.view property like you are doing.

Do this in your -viewDidLoad

[self.view addSubview: mapView_];

instead of

self.view = mapView_;

if you are passing GMSMapView to the self.view property, the map is only view which is in the controller from this point. Thats, I believe, the reason why u can't see your IB-created button.