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Flutter 杂碎 #12

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noyobo opened this issue Jul 30, 2019 · 1 comment

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noyobo commented Jul 30, 2019

生命周期

flutter: initState
flutter: didChangeDependencies
flutter: build
flutter: reassemble
flutter: didUpdateWidget
flutter: build
Reloaded 0 of 508 libraries in 84ms.
flutter: reassemble
flutter: deactive
flutter: dispose
Reloaded 1 of 508 libraries in 236ms.

Owner Author

noyobo commented Jul 30, 2019 •

edited

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Widget管理自己的state。
父widget管理子widget状态。
混合管理（父widget和子widget都管理状态）。

如何决定使用哪种管理方法？以下原则可以帮助你决定：

如果状态是用户数据，如复选框的选中状态、滑块的位置，则该状态最好由父widget管理。
如果状态是有关界面外观效果的，例如颜色、动画，那么状态最好由widget本身来管理。
如果某一个状态是不同widget共享的则最好由它们共同的父widget管理。

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