At first, you can look at my codepen : http://codepen.io/harked/pen/gpvdNK
I want to create an event :
when user click the (+) button icon at the right, it will immediately change itself to (-) button icon.
And when we click it again, it will be back to (+).
It seems like the changing-icon happened in accordion list : http://codepen.io/ionic/pen/uJkCz
But i got a problem how to implement that in my case.
is there anyone can show how to create like that?
Any advice would be greatly appreciated!