如何在颤动中堆叠圆圈

How to stack circles in flutter

我想像图片中一样堆叠圆圈,我尝试使用 Stack 小部件来完成,但似乎不起作用。

它是否适合使用小部件?如果是,我该如何正确设置它,如果不是,我应该使用什么小部件?

感谢您的帮助。

您可以将 Stack Widget 与 CirlceAvatar 小部件一起使用 children,但在这种情况下,您还必须考虑是否有足够 space 来容纳所有项目和显示未见 children 的计数,我建议使用 overflow_view 包。它方便、维护良好且足够小,如果您不愿意添加额外的依赖项,您可以出售它。如果您决定使用它,它的自述文件中有简单的说明:

OverflowView(
  // Either layout the children horizontally (the default)
  // or vertically.
  direction: Axis.horizontal,
  // The amount of space between children.
  spacing: 4,
  // The widgets to display until there is not enough space.
  children: <Widget>[
    for (int i = 0; i < _counter; i++)
      AvatarWidget(
        text: avatars[i].initials,
        color: avatars[i].color,
      )
  ],
  // The overview indicator showed if there is not enough space for
  // all chidren.
  builder: (context, remaining) {
    // You can return any widget here.
    // You can either show a +n widget or a more complex widget
    // which can show a thumbnail of not rendered widgets.
    return AvatarWidget(
      text: '+$remaining',
      color: Colors.red,
    );
  },
)

正确:需要使用堆栈;我添加一个简单的例子:

Example

SizedBox(
      width: 400,
      height: 400,
      child: Stack(
        children: [
          Positioned(
            top: 0,
            child: ClipRRect(
              borderRadius: BorderRadius.circular(100),
              child: Image.network(
                'https://images.unsplash.com/photo-1529665253569-6d01c0eaf7b6?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8Mnx8cHJvZmlsZXxlbnwwfHwwfHw%3D&w=1000&q=80',
                width: 100,
                height: 100,
                fit: BoxFit.cover,
              ),
            ),
          ),
          Positioned(
            left: 75,
            child: ClipRRect(
              borderRadius: BorderRadius.circular(100),
              child: Image.network(
                'https://media.istockphoto.com/photos/side-view-of-one-young-woman-picture-id1134378235?k=20&m=1134378235&s=612x612&w=0&h=0yIqc847atslcQvC3sdYE6bRByfjNTfOkyJc5e34kgU=',
                width: 100,
                height: 100,
                fit: BoxFit.cover,
              ),
            ),
          ),
          Positioned(
            left: 150,
            child: ClipRRect(
              borderRadius: BorderRadius.circular(100),
              child: Image.network(
                'https://images.unsplash.com/photo-1529665253569-6d01c0eaf7b6?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxzZWFyY2h8Mnx8cHJvZmlsZXxlbnwwfHwwfHw%3D&w=1000&q=80',
                width: 100,
                height: 100,
                fit: BoxFit.cover,
              ),
            ),
          ),
          Positioned(
            left: 225,
            child: ClipRRect(
              borderRadius: BorderRadius.circular(100),
              child: Image.network(
                'https://media.istockphoto.com/photos/side-view-of-one-young-woman-picture-id1134378235?k=20&m=1134378235&s=612x612&w=0&h=0yIqc847atslcQvC3sdYE6bRByfjNTfOkyJc5e34kgU=',
                width: 100,
                height: 100,
                fit: BoxFit.cover,
              ),
            ),
          )
        ],
      ),
    );