Feature AnimatedImage placeholder view builder #94
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This PR supports the
@ViewBuilder
API to create placeholder onAnimatedImage
.The channlege is that
AnimatedImage
useUIViewRepresentable
, which thebody
func is override by SwiftUI internel logic. So we can not use the same design asWebImage
(which return different Image based on loading status)So, instead, we use the HostingView, to inject the View Hierarchy. The placeholder is above the original SDAnimatedImageView, and controls its
isHidden
property during loading.Note the placeholder and indicator can be used at the same time, we need to considerate this case and adjust the View Hierarchy level