%BUF$PNQPOFOUT'PSNBUUFS
let formatter = DateComponentsFormatter()
formatter.string(from: now, to: future)
// 1 5:27:50
formatter.allowedUnits = [.hour, .minute]
formatter.string(from: now, to: future)
// 29:27
comp.includesApproximationPhrase = true
comp.string(from: now, to: future)
// About 29:27