flutter pub add loading_gifs基于插件公开信息、社区数据与项目使用情况整理的选型参考。
一个 Flutter 包，为 Material 和 Cupertino 设计提供加载指示器 GIF，针对 Android 和 iOS 进行优化。它提供多种尺寸，可在加载远程图像资源时作为占位符使用。该包支持 Web、macOS、Windows 和 Linux 等多个平台，确保在不同设备上提供一致的视觉反馈。非常适合用于改善异步操作（如图像获取）期间的用户体验。
以下为关联源码仓库的 README 原文快照，最新内容请访问源码仓库。
High quality Android and iOS loading spinners.
Loading GIFs is a collection of high fidelity loading animations in GIF format. Included are Android "Material Design" and iOS "Cupertino" default loading indicators.
Import this library into your project:
loading_gifs: ^latest_version
Use cupertinoActivityIndicator or circularProgressIndicator where ever a loading image is needed.
FadeInImage.assetNetwork(placeholder: cupertinoActivityIndicator, image: "image.png");
That's it!
This library is optimized for size so it only includes the base asset sizes. Change the size of the loading spinners using scale and placeholderScale.
FadeInImage.assetNetwork(placeholder: cupertinoActivityIndicator, image: "image.png", placeholderScale: 5);
Image.asset(circularProgressIndicator, scale: 10);
When loading images whose dimensions are unknown ahead of time, use cupertinoActivityIndicatorSmall instead of cupertinoActivityIndicator. cupertinoActivityIndicatorSmall is a min height variant of cupertinoActivityIndicator which allows Flutter to correctly expand the loaded image into the layout.
The small variant should be used when loading a list of images or compositing an image from multiple images.
ListView(
children: <Widget>[
FadeInImage.assetNetwork(
placeholder: cupertinoActivityIndicatorSmall,
image: "image_1.png"),
FadeInImage.assetNetwork(
placeholder: cupertinoActivityIndicatorSmall,
image: "image_2.png"),
FadeInImage.assetNetwork(
placeholder: cupertinoActivityIndicatorSmall,
image: "image_3.png"),
],
)
FadeInImage requires a valid placeholder image to avoid "Asset not found" errors. Use placeholderEmpty, a 1x1 pixel transparent PNG, when an empty placeholder is needed.
FadeInImage.assetNetwork(placeholder: placeholderEmpty, image: "image.png");
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|---|---|
| Full (159KB) | Optimized (78KB) |
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|---|---|---|
| Large Square (36KB) | Medium Square (14KB) | Small Square (7KB) |
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|---|---|---|
| Large (16KB) | Medium (16KB) | Small (16KB) |
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|---|---|
| Full (1.13MB) | Optimized (263KB) |
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|---|---|---|
| Large Square (225KB) | Medium Square (148KB) | Small Square (100KB) |
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|---|---|---|
| Large (129KB) | Medium (149KB) | Small (186KB) |
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Design:
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Sponsor: Codelessly - Flutter App UI and Website Builder
BSD Zero Clause License
Copyright © 2020 Codelessly
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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