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Simple Rails app, mostly scaffolding. I want to detect whether the user is using Android or iPhone to access my app. What's the easiest way to do that?
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To detect the operating system on the client machine, one can simply use navigator. appVersion or navigator. userAgent property. The Navigator appVersion property is a read-only property and it returns a string which represents the version information of the browser.
Detect Operating System With the userAgent Property in JavaScript. If we want to track a little detail about the user's used browser and platform, we can go for the userAgent property with the navigator object. This special feature returns a string containing the browser's name, version, and platform name.
if request.env['HTTP_USER_AGENT'].downcase.match(/android|iphone/)
puts "yup, its mobile"
end
I know this question is old, but in case this helps someone else, I use this method in application_controller.rb to automatically set the format to :mobile:
before_filter :detect_mobile
protected
def detect_mobile
request.format = :mobile if mobile?
end
def mobile?
request.user_agent =~ /iPhone|iPad|Android/i
end
The mobile? method is separate so that you can also use it in your own controllers if you need to do some sort of conditional logic for mobile browsers.
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