You put a custom view you built (say, a tag chip view) into a UIStackView and it's sized to zero and invisible. How would you explain the cause and the fix in terms of intrinsic content size?
A custom view doesn't tell Auto Layout its own size by default, so without size constraints it's computed as zero. Override intrinsicContentSize to return the content plus padding, and call invalidateIntrinsicContentSize() when the content changes so the engine reads the value again.
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