flutter pub add loading_gifs根據套件公開資料產生的選型評估，僅供參考。
一個 Flutter 套件，為 Material 和 Cupertino 設計提供載入指示器 GIF，針對 Android 和 iOS 進行優化。它提供多種尺寸，可用於加載遠端影像資源時作為佔位符。該套件支援 Web、macOS、Windows 和 Linux 等多個平台，確保在不同裝置上提供一致的視覺反饋。非常適合用於改善異步作業（如影像取得）期間的使用者體驗。
以下為關聯原始碼儲存庫的 README 原文快照，最新內容請造訪原始碼儲存庫。
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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Sponsor: Codelessly - Flutter App UI and Website Builder
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Copyright © 2020 Codelessly
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