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如何重建我的 PageView.builder？当我改变_type财产时MyPage，我想重建它

child: PageView.builder(
            controller: _controller,
            itemCount: items.length,
            allowImplicitScrolling: true,
            reverse: false,
            onPageChanged: (int position) {
              item = items[position];
            },
            itemBuilder: (context, position) => MyPage(
                  item: items[position],
                  type: _type)),
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