gistfile1.applescript

#!/usr/bin/env osascript

on run argv
    if count of argv < 1 then
        logEvent("Usage: ./changeVersion iOSVersion(7.1,7.0)")
        error number -128
    end
    
    set iOSVersion to item 1 of argv
    
    tell application "Xcode" to activate
    
    try
        tell application "System Events"
            tell process "Xcode"
                tell menu bar 1
                    tell menu bar item "Product"
                        tell menu 1
                            tell menu item "Destination"
                                tell menu 1
                                    tell menu item "iPhone Retina (4-inch)"
                                        tell menu 1
                                            click menu item ("iOS " & iOSVersion)
                                        end tell
                                    end tell
                                end tell
                            end tell
                        end tell
                    end tell
                end tell
            end tell
        end tell
    on error errMsg
        logEvent ("Error: " & errMsg)
    end try
end run


to logEvent(themessage)
    do shell script "echo '" & themessage & "' >> ~/Library/Logs/AppleScript-events.log"
end log_event