Open Gmail app from my app

Question

I'm trying to send an email from my app. But what I want is if user is having Gmail app on his/her phone, then mail should be sent using it. If Gmail app is unavailable then the user should be redirected to Mailbox.

So how can I know if user contains Gmail app and how can I redirect user to it.

Answer 1

Setup for iOS9+

As explained here, if you're on iOS9+, don't forget to add googlegmail to LSApplicationQueriesSchemes on your info.plist

Code to open GMail

Then, you can do the same as the accepted answer (below is my swift 2.3 version):

let googleUrlString = "googlegmail:///co?subject=Hello&body=Hi"
if let googleUrl = NSURL(string: googleUrlString) {
    // show alert to choose app
    if UIApplication.sharedApplication().canOpenURL(googleUrl) {
        if #available(iOS 10.0, *) {
          UIApplication.sharedApplication().openURL(googleUrl, options: [:], completionHandler: nil)
        } else {
          UIApplication.sharedApplication().openURL(googleUrl)
        }
    }
}