How to keep UIButton highlighted until a second touch?

Question

I want to keep a button in highlighted state image until a second touch to release it to the normal state.

I've try the dispatch_async method, but it simply couldn't be back to normal state after another click.

(I'm coding in Swift so performSelector:WithObject method doesn't work either.)

you can use images to set to UIButton and change them on first click and second click. — Rahul Shirphule, Jun 12 '15 at 09:16
You cant hold a highlighted state since it automatically gets set/cleared when touch enters/exits during tracking and cleared on up. So you have to use normal and selected state to show your desired image — karthikPrabhu Alagu, Jun 12 '15 at 09:39
possible duplicate of [How do I toggle hidden of a label while a button is pressed?](http://stackoverflow.com/questions/30743959/how-do-i-toggle-hidden-of-a-label-while-a-button-is-pressed) — nhgrif, Jun 12 '15 at 14:52

score 7 · Accepted Answer · answered Jun 12 '15 at 09:25

7

I will use selected state instead of highlighted. UIButton has already the property so you don't need to create any other property.

button.setImage(image, forState: UIControlState.Normal)
button.setImage(selectedImage, forState: UIControlState.Selected)

button.addTarget(self, action: "buttonTapped:", forControlEvents: UIControlEvents.TouchUpInside)


func buttonTapped(sender:UIButton)
{
  sender.selected = !sender.selected;
}

answered Jun 12 '15 at 09:25

agy

2,804
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15
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Thanks it works perfectly. You are so helpful. Bravo. – Tinyik Jun 12 '15 at 12:30
1

But if the Button has an Image, then the selected property does not work!! – iFadi Feb 04 '16 at 15:39

score -1 · Answer 2 · answered Jun 12 '15 at 09:22

-1

The best solution is extend the UIButton class, add the "highlited" BOOL flag. After each click just update this flag and set different image.

answered Jun 12 '15 at 09:22

Łukasz Gierałtowski

539
4
7

How to keep UIButton highlighted until a second touch?

2 Answers2