How to set root view controller in Today extension programmatically - ios

Question

I have a project without storyboard. I've set root view controller in AppDelegate. Now I've added a today extension. I got a new storyboard MainInterface.storyboard with root view controller TodayViewController. How can I delete MainInterface.storyboard and set root view controller programmatically?

Answer 1

Xcode 11.0
Open Info.plist from your Extension and change
<dict>
<key>NSExtensionMainStoryboard</key>
<string>MainInterface</string>
...
</dict>
to:
<dict>
<key>NSExtensionPrincipalClass</key>
<string>NameOfYourExtension.NameOfYourViewController</string>
...
</dict>
Delete MainInterface.storyboard and it should work without any faults.

Answer 2

Using the URL Scheme to achieve your goal, See this code.
Write the following code in TodayViewController (Today extension swift file)
#IBAction func buttonTapped(_ sender: UIButton) {
let url = URL(string: "MyAppTodayExtension://")!
self.extensionContext?.open(url, completionHandler: { (success) in
if (!success) {
print("error: failed to open app from Today Extension")
}
})
}
Add URL Scheme in your info.plist file
<key>CFBundleURLTypes</key>
<array>
<dict>
<key>CFBundleTypeRole</key>
<string>Editor</string>
<key>CFBundleURLSchemes</key>
<array>
<string>MyAppTodayExtension</string>
</array>
</dict>
</array>
When you tap in today extension then get call following method in AppDelegate.swift file.
func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
//Write code here for navigating to a specific controller OR set root view controller
return true
}