Flutter for Beginners

Rotate animation

Instead of changing the button rotation directly, we can instead make it progressive by using the AnimationController class:

Check out the hands_on_animations example on GitHub for the complete examples.

In this example, we are creating our widget in a very similar way to before (in Chapter 14, Widget Graphic Manipulations):

_rotationAnimationButton() {    return Transform.rotate(      angle: _angle,      child: RaisedButton(        child: Text("Rotated button"),        onPressed: () {          if (_animation.status == AnimationStatus.completed) {            _animation.reset();            _animation.forward();          }        },      ),    );  }

As you can see, there are two important things to notice: ...