請支持原文：tryenough.com/images-anim…

效果如下圖：

代碼

import 'package:flutter/material.dart';
import 'package:sprintf/sprintf.dart';  //這個是一個拼接字符串的flutter庫，主要是為了使用方便，你可以選擇不使用，這樣的話你需要自己拼接圖片路徑class ImagesAnimation extends StatefulWidget {final double w;final double h;final ImagesAnimationEntry entry;final int durationSeconds;ImagesAnimation({Key key, this.w : 80, this.h : 80, this.entry, this.durationSeconds : 3}):super(key:key);@override_InState createState() {return _InState();}
}class _InState extends State<ImagesAnimation> with TickerProviderStateMixin{AnimationController _controller;Animation<int> _animation;@overridevoid initState() {super.initState();_controller = new AnimationController(vsync: this, duration: Duration(seconds: widget.durationSeconds))..repeat();_animation = new IntTween(begin: widget.entry.lowIndex, end: widget.entry.highIndex).animate(_controller);
//widget.entry.lowIndex 表示從第幾下標開始，如0；widget.entry.highIndex表示最大下標：如7}@overrideWidget build(BuildContext context) {return new AnimatedBuilder(animation: _animation,builder: (BuildContext context, Widget child) {String frame = _animation.value.toString();return new Image.asset(sprintf(widget.entry.basePath, [frame]), //根據傳進來的參數拼接路徑gaplessPlayback: true, //避免圖片閃爍width: widget.w,height: widget.h,);},);}}class ImagesAnimationEntry {int lowIndex = 0;int highIndex = 0;String basePath;ImagesAnimationEntry(this.lowIndex, this.highIndex, this.basePath);
}
復制代碼

請支持原文：tryenough.com/images-anim…

使用的地方：

ImagesAnimation(w: 100, h: 100, entry: ImagesAnimationEntry(1, 7, "images/men_sport_%s.png")),
//"images/men_sport_%s.png" 表示圖片在你本地的路徑，%s會被下標代替
復制代碼