Google map applies a function relatively complete, IOS select programming source code examples, good reference.

.gitignore
CalloutDemo
...........\CalloutDemo
...........\CalloutDemo.xcodeproj
...........\.....................\project.pbxproj
...........\.....................\project.xcworkspace
...........\.....................\...................\contents.xcworkspacedata
...........\...........\AppDelegate.h
...........\...........\AppDelegate.m
...........\...........\Assets
...........\...........\......\bluestar.png
...........\...........\......\bluestar@2x.png
...........\...........\......\redstar.png
...........\...........\......\redstar@2x.png
...........\...........\CalloutDemo-Info.plist
...........\...........\CalloutDemo-Prefix.pch
...........\...........\District.h
...........\...........\District.m
...........\...........\en.lproj
...........\...........\........\InfoPlist.strings
...........\...........\........\ViewController_iPad.xib
...........\...........\........\ViewController_iPhone.xib
...........\...........\main.m
...........\...........\Representative.h
...........\...........\Representative.m
...........\...........\ViewController.h
...........\...........\ViewController.m
LICENSE.html
MultiRowCalloutAnnotationView
.............................\GenericPinAnnotationView.h
.............................\GenericPinAnnotationView.m
.............................\MultiRowAnnotation.h
.............................\MultiRowAnnotation.m
.............................\MultiRowAnnotationProtocol.h
.............................\MultiRowCalloutAnnotationView.h
.............................\MultiRowCalloutAnnotationView.m
.............................\MultiRowCalloutCell.h
.............................\MultiRowCalloutCell.m
README.md
screenshot.png

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