Flutter拋出另一個例外：RenderBoxwasnotlayout:RenderRepaintBoundary#a2797relayoutBoundary=up16NEEDS-PAINT

我正在處理 Listview 轉換 GridView 但不顯示 Grid 并收到此錯誤。我也嘗試在GridView.builder中包裝Expanded

 child: GridView.builder(
                  gridDelegate:
                      const SliverGridDelegateWithFixedCrossAxisCount(
                    crossAxisCount: 2,
                  ),
                  itemBuilder: (context, index) {
                    final item = catalog.items![index];
                    return Card(
         
                      child: GridTile(
                        header: Container(
                          child: Text(
                            item.name,
                            style: TextStyle(color: Colors.white),
                          ),
                          padding: EdgeInsets.all(12),
                          decoration:
                              BoxDecoration(color: Colors.deepPurple),
                        ),
                        child: Image.network(item.image),
                        footer: Container(
                          child: Text(
                            item.price.toString(),
                            style: TextStyle(
                              color: Colors.white,
                            ),
                          ),
                        ),
                      ),
                    );
                  },
                ) 

uj5u.com熱心網友回復：

shrinkWrap : true在里面使用GridView.Builder

uj5u.com熱心網友回復：

嘗試itemCount呼叫GridView.builder(

GridView.builder(
  gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
    crossAxisCount: 2,
  ),
  itemCount: item.length, //this
  itemBuilder: (context, index) {

Expanaded如果它在小部件內，也有小Colum部件。

uj5u.com熱心網友回復：

通過獲取資料添加專案計數長度

child: GridView.builder(
              gridDelegate:
                  const SliverGridDelegateWithFixedCrossAxisCount(
                crossAxisCount: 2,
              ),
              itemCount: catalog.items!.length, //Adding This to Solved
              itemBuilder: (context, index) {
                final item = catalog.items![index];
                return Card(
     
                  child: GridTile(
                    header: Container(
                      child: Text(
                        item.name,
                        style: TextStyle(color: Colors.white),
                      ),
                      padding: EdgeInsets.all(12),
                      decoration:
                          BoxDecoration(color: Colors.deepPurple),
                    ),
                    child: Image.network(item.image),
                    footer: Container(
                      child: Text(
                        item.price.toString(),
                        style: TextStyle(
                          color: Colors.white,
                        ),
                      ),
                    ),
                  ),
                );
              },
            ) 

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