PowerImage class
Constructors
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PowerImage({Key? key, required PowerImageProvider image, CustomImageBuilder? imageBuilder, ImageFrameBuilder? frameBuilder, ImageErrorWidgetBuilder? errorBuilder, double? width, double? height, BoxFit fit = BoxFit.cover, AlignmentGeometry alignment = Alignment.center, String? semanticLabel, bool excludeFromSemantics = false})
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完全自定义的方式，通过自定义 imageProvider 来获取图片，imageBuilder 为扩展的自定义展示，
const
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PowerImage.asset(String src, {Key? key, String? renderingType, double? imageWidth, double? imageHeight, String? package, double? width, double? height, ImageFrameBuilder? frameBuilder, ImageErrorWidgetBuilder? errorBuilder, BoxFit fit = BoxFit.cover, AlignmentGeometry alignment = Alignment.center, String? semanticLabel, bool excludeFromSemantics = false})
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flutter 本地图片。
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PowerImage.file(String src, {Key? key, String? renderingType, double? imageWidth, double? imageHeight, double? width, double? height, ImageFrameBuilder? frameBuilder, ImageErrorWidgetBuilder? errorBuilder, BoxFit fit = BoxFit.cover, AlignmentGeometry alignment = Alignment.center, String? semanticLabel, bool excludeFromSemantics = false})
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native 本地图片文件。
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PowerImage.nativeAsset(String src, {Key? key, String? renderingType, double? imageWidth, double? imageHeight, double? width, double? height, ImageFrameBuilder? frameBuilder, ImageErrorWidgetBuilder? errorBuilder, BoxFit fit = BoxFit.cover, AlignmentGeometry alignment = Alignment.center, String? semanticLabel, bool excludeFromSemantics = false})
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native 本地图片。
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PowerImage.network(String src, {Key? key, String? renderingType, double? imageWidth, double? imageHeight, double? width, double? height, ImageFrameBuilder? frameBuilder, ImageErrorWidgetBuilder? errorBuilder, BoxFit fit = BoxFit.cover, AlignmentGeometry alignment = Alignment.center, String? semanticLabel, bool excludeFromSemantics = false})
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网络图，将从 native 图片库中获取图片。
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PowerImage.options(PowerImageRequestOptions options, {Key? key, double? width, double? height, ImageFrameBuilder? frameBuilder, ImageErrorWidgetBuilder? errorBuilder, BoxFit fit = BoxFit.cover, AlignmentGeometry alignment = Alignment.center, String? semanticLabel, bool excludeFromSemantics = false})
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更加灵活的方式，通过自定义options来展示图片
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PowerImage.type(String imageType, {required PowerImageRequestOptionsSrc src, Key? key, String? renderingType, double? imageWidth, double? imageHeight, double? width, double? height, ImageFrameBuilder? frameBuilder, ImageErrorWidgetBuilder? errorBuilder, BoxFit fit = BoxFit.cover, AlignmentGeometry alignment = Alignment.center, String? semanticLabel, bool excludeFromSemantics = false})
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自定义 imageType\src
效果：将src encode 后，完成地传递给 native 对应 imageType 注册的 loader
使用场景：
例如，自定义加载相册照片，通过自定义 imageType 为 "album"，
native 侧注册 "album" 类型的 loader 自定义图片的加载。
