🔰view hierarchy
view hierarchy (視圖層級)
root view 與其所含的所有子視圖 (descendants) 形成 view hierarchy。
view hierarchy
root view:視圖層級的最上層
parent view:視圖層級的上層
child view:視圖層級的下層
在 container view 的狀況,大括號裡面的 views 就是 child views。
// case: container view
HStack { // parent
Text("Hello") // child
Color.red // child
}在有 view modifiers 的情況下,要倒過來看,前面的是 child view,後面的是 parent view。
// case: view modifiers
view // child
.padding() // parent
.frame(width: 100, height: 100) // grand parent
.border(.black) // grand grand parent如果結合起來看:
// container view + view modifiers
HStack { // parent
Text("Hello") // child
Color.red // child
}
.padding() // parent
.frame(width: 100, height: 100) // grand parent
.border(.black) // grand grand parent這時的 view hierarchy 就會變成:
// view hierarchy
border ── frame ── padding ── HStack ─┬─ Text
└─ Color.redUse a WindowGroup as a container for a view hierarchy that your app presents.
在 view hierarchy 中,一個 view 前面的 view,稱為前景 (foreground)。
view size:parent view proposes a size to the child views it contains, and the child views respond with a computed size.
Last updated
Was this helpful?