start method
void
start()
This Method Starts the Countdown Timer
Implementation
void start() {
if (_isReverse) {
_state._controller?.reverse(
from:
_initialDuration == 0 ? 1 : 1 - (_initialDuration! / _duration!));
} else {
_state._controller?.forward(
from: _initialDuration == 0 ? 0 : (_initialDuration! / _duration!));
}
isStarted = true;
}