Différences

Ci-dessous, les différences entre deux révisions de la page.

--- informatique:flutter:debug [09/07/2025 14:05] – cyrille
+++ informatique:flutter:debug [09/07/2025 18:28] (Version actuelle) – cyrille
@@ Ligne 1: / Ligne 1: @@
 ====== Flutter / debug ======
-Le rendu
+  * Dart & Flutter support for Visual Studio Code [[https://dartcode.org/docs/debugging-commands/|Debugging Commands]]
+===== Attraper un maximum d'erreurs =====
+{{ :informatique:flutter:debug_catch_max_errors.png?nolink&400 |}}
+===== Le rendu plante sans rien dans la debug console =====
 Le rendu ne va pas, il plante sans rien "//dire//" **(1)** et aucune erreur dans la "debug console".
 On observe dans la partie "call stack" **(2)** le message en rouge "Paused on exception", c'est là qui faut dire au debugger de continuer "Continue (F5)" **(3)** pour voir apparaître les détails de l'erreur **(4)**.
@@ Ligne 8: / Ligne 15: @@
 {{:informatique:flutter:debug_rendering_02.png?nolink&400|}}
 {{:informatique:flutter:debug_rendering_03.png?nolink&400|}}
+Par exemple un ''ListView'' dans un ''Column'' génère l'erreur, avec souvent une explication.
+<code>
+════════ Exception caught by rendering library ═════════════════════════════════
+The following assertion was thrown during performResize():
+Vertical viewport was given unbounded height.
+Viewports expand in the scrolling direction to fill their container. In this case, a vertical viewport was given an unlimited amount of vertical space in which to expand. This situation typically happens when a scrollable widget is nested inside another scrollable widget.
+If this widget is always nested in a scrollable widget there is no need to use a viewport because there will always be enough vertical space for the children. In this case, consider using a Column or Wrap instead. Otherwise, consider using a CustomScrollView to concatenate arbitrary slivers into a single scrollable.
+The relevant error-causing widget was:
+    ListView ListView:file:///home/.../CroustiWiki.flutter/lib/widgets/duks_list.dart:53:27
+...
+════════ Exception caught by rendering library ═════════════════════════════════
+RenderBox was not laid out: RenderViewport#6f0f6 NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
+'package:flutter/src/rendering/box.dart':
+Failed assertion: line 2251 pos 12: 'hasSize'
+The relevant error-causing widget was:
+    ListView ListView:file:///home/.../CroustiWiki.flutter/lib/widgets/duks_list.dart:53:27
+════════════════════════════════════════════════════════════════════════════════
+</code>