[译] 在 Flutter 中实现微光闪烁效果

import 'package:flutter/material.dart';
 
class TwinklingLight extends StatefulWidget {
  @override
  _TwinklingLightState createState() => _TwinklingLightState();
}
 
class _TwinklingLightState extends State<TwinklingLight> with TickerProviderStateMixin {
  AnimationController _controller;
  Animation<double> _animation;
 
  @override
  void initState() {
    super.initState();
    _controller = AnimationController(
      duration: const Duration(seconds: 2),
      vsync: this,
    )..repeat(reverse: true);
    _animation = Tween(begin: 0.0, end: 1.0).animate(_controller);
  }
 
  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }
 
  @override
  Widget build(BuildContext context) {
    return Container(
      width: 100.0,
      height: 100.0,
      color: Colors.transparent,
      child: AnimatedBuilder(
        animation: _controller,
        builder: (BuildContext context, Widget child) {
          return Opacity(
            opacity: _animation.value,
            child: Container(
              width: 100.0,
              height: 100.0,
              decoration: BoxDecoration(
                shape: BoxShape.circle,
                color: Colors.white,
              ),
            ),
          );
        },
      ),
    );
  }
}

这段代码定义了一个名为TwinklingLight的微光闪烁效果的Widget，它使用了AnimationController和AnimatedBuilder来创建一个持续进行闪烁的圆形容器。代码简洁，注重教学，值得学习和借鉴。