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)
        }
    }
}

Answer 2

For Swift 3.0+

Notes:

1. This solution shows how to use spaces or newlines in the arguments to the URL (Gmail may not respect the newlines).

2. It is NOT necessary to register with LSApplicationQueriesSchemes as long as you don't call canOpenURL(url). Just try and use the completion handler to determine if it succeeded.

   let googleUrlString = "googlegmail:///co?to=\(address.addingPercentEncoding(withAllowedCharacters: .alphanumerics) ?? "")&subject=\(subject.addingPercentEncoding(withAllowedCharacters: .alphanumerics) ?? "")&body=\(buildInfo.addingPercentEncoding(withAllowedCharacters: .alphanumerics) ?? "")"
   
   if let googleUrl = URL(string: googleUrlString) {
       UIApplication.shared.open(googleUrl, options: [:]) {
           success in
           if !success {
                // Notify user or handle failure as appropriate
           }
       }
   }
   else {
       print("Could not get URL from string")
   }
   

Answer 3

I couldn't figure out why this wasn't working for me until I realised I was targetting a info_development.plist instead of the production-file info.plist

If you're like me and happen to have multiple Plists (one for development, one for prod etc) make sure you edit it everywhere. ;-)

Answer 4

Swift 5

These answers can open gmail but what if the user do not have gmail installed in the device? In that case I have handled opening apple mail/outlook/yahoo/spark. If none of them are present, I am showing an alert.

@IBAction func openmailAction() {
    if let googleUrl = NSURL(string: "googlegmail://") {
        openMail(googleUrl)
    } else if let mailURL = NSURL(string: "message://") {
        openMail(mailURL)
    } else if let outlookURL = NSURL(string: "ms-outlook://") {
        openMail(outlookURL)
    } else if let yahooURL = NSURL(string: "ymail://") {
        openMail(yahooURL)
    } else if let sparkUrl = NSURL(string: "readdle-spark://") {
        openMail(sparkUrl)
    } else {
        // showAlert
    }
}

func openMail(_ url: NSURL) {
    if UIApplication.shared.canOpenURL(url as URL) {
        UIApplication.shared.open(url as URL, options: [:], completionHandler: nil)
    }
}

You might also may have to add this in the plist

<key>LSApplicationQueriesSchemes</key>
<array>
    <string>googlegmail</string>
    <string>ms-outlook</string>
    <string>readdle-spark</string>
    <string>ymail</string>
</array>