Decrease in Button Opacity loses touch sensitivity

[mediatagging]

In multiple apps of mine i've noticed the following:

I use custom buttons.
I use custom Type
Opacity = 0.0
image = [whatever image it is].
touch up inside

Button is the topmost view.

Sometimes the button works on first hit, sometimes it doesnt. It happens in multiple apps i have.

Any idea?

[Duncan C]

Originally Posted by mediatagging

In multiple apps of mine i've noticed the following:

I use custom buttons.
I use custom Type
Opacity = 0.0
image = [whatever image it is].
touch up inside

Button is the topmost view.

Sometimes the button works on first hit, sometimes it doesnt. It happens in multiple apps i have.

Any idea?

I get the impression that UIControls stop responding to touches when their opacity drops below a certain threshold (50%?) I haven't done rigorous testing to confirm this. As to why your button would work the first time, I don't know.