Question

Hi I want to implement a general fade and reveal algorithm for a mix of UIButtons and UILabels for iPhone. I set the method to receive the object as id.
But I don’t know how to get and set the alpha values for id objects.

I first tried myObject.alpha and then tried [myObject getAlpha] but Xcode says getAlpha method is not found. Anyone knows how to get the alpha value of an id object or recommend another way to do this?

Answer 1

try core Animation

[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.4f];
[YOUR_OBJECT setAlpha:1.0f]; //or 0.0f
[UIView commitAnimations];

thanks.