🔹.frame()
TestFrameView - demo ideal size, min width.
TestIdealSizeView - test ideal size behaviors.
TestLittleSquares - demo adaptive layout.
.frame() 只是改變 parent's proposed size，並非改變 child view's size，child view 本身的大小還是由 child view 自己決定❗️(👉 See: TestFrameView)
Frame Behaviors
pull-in views:
only take as much space as needed, e.g. HStack/VStack.- adaptive pull-in views:
take only what they need, if offered is not enough, they'll do their best (truncate or wrap) to respect the offered space, e.g. Text.
push-out views:
take all the space offered, e.g. Rectangle.Custom views: draw outside the area offered.
.padding( )：會改變 frame❗
can use .testFrame() to test frame behaviors.
convenience extensions: view + .frame()
can use .dimension() (View extension) to show a view's frame visually.
問：如何製作一個像 Text 一樣的 custom view，可以根據 parent's offered size，調整成緊貼自己內容的 frame❓
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