Flutter 手势检测器

Question

How can I make a flutter app that makes a particular action based on swiping in the screen from a point to another and its important that I want the start and end point to be specified or also can use if you can help me make the swipe in a particular angle and the swipe have to be above or below a certain length So in short I want I want either start and end point of the swipe or angle and length and I will be so happy if you can do both of them

Answer 1

Try this:

GestureDetector(
      onPanUpdate: (details) {
        // Swiping in right direction.
        if (details.delta.dx > 0) {}

        // Swiping in left direction.
        if (details.delta.dx < 0) {}
      },

      onPanEnd: (details) {
        // User swiped Left
        if (details.primaryVelocity > 0) {}
          
        // User swiped Right
        if (details.primaryVelocity < 0) {}
      },
      child: YourWidget(),
    )