UITabBarController Shared Data Model - share & update model from anywhere - ios

Question

I'm using a TabBarcontroller type app and I'm using a shared model of the form:
enum WorkoutState {
case Stopped
case Started
case Paused
}
class BaseTBController: UITabBarController {
var workoutState: WorkoutState? = .Stopped
}
Currently all is working and I can access and update the variable across the different tabs using
let tabbar = tabBarController as! BaseTBController
if tabbar.workoutState = .Stop {
//do something
tabbar.workoutState = .Start
}
Now, the situation is that I seem to need to put this all over the place in my code. eg:
startRun()
resumeRun()
pauseRun()
Is there a better way to do this instead of putting
let tabbar = tabBarController as! BaseTBController
tabbar.workoutState = .Start
in each of the 3 functions?

Answer 1

You can always use protocol and default extension to achieve what you need
protocol HandleWorkStateProtocol where Self: UIViewController {
func updateWorkOutState(to: WorkoutState)
}
extension HandleWorkStateProtocol {
func updateWorkOutState(to state: WorkoutState) {
guard let tabBarController = self.tabBarController as? BaseTBController else { return }
tabBarController.workoutState = state
}
}
In all you view controller's that has these 3 methods (startRun, resumeRun, pauseRun) simply confirm to this protocol and call updateWorkOutState(to: with appropriate value to modify the status
class SomeTestViewController: UIViewController {
func startRun() {
self.updateWorkOutState(to: .Started)
}
func resumeRun() {
}
func pauseRun() {
self.updateWorkOutState(to: .Paused)
}
}
extension SomeTestViewController: HandleWorkStateProtocol {}
P.S
Case values of enum does not follow Pascal casing like Stopped instead it follows Camel casing stopped so change your enum values to
enum WorkoutState {
case stopped
case started
case paused
}