tickerProvider property

TickerProvider get tickerProvider

基于lifecycle来生成 TickerProvider

Implementation

TickerProvider get tickerProvider =>
    toLifecycle().extData.getOrPut<_LifecycleTickerProvider>(
          key: _keyLifecycleTickerProvider,
          ifAbsent: (l) => _LifecycleTickerProvider(l),
        );