on ontap event want to show small rectangle with some data

I have created map application and on map i m showing the users,I want to show small rectangle on clicking the users on the map with some details of that user. Please give me some开发者_如何学Go idea to do this.

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This is the great tutorial for your requirement .

To achieve your requirement you need to use itemized-overlay it will show a info when you click on map's item.