matrix of buttons

Question

Hello I have a matrix of buttons, 4x3 And i have the following problems, or let's say i don't know where to begin

1. they are inited with a label from an array and they call the same function -(IBAction)buttonPressed:(id)sender Buttons are made programatically, not sure the function needs IBAction. How do i detect in this function what button was pressed? i thought at something like sender.label but is not working. Here's how i call it:

   [playButton addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];

2. How do i detect the touch? i want to display an uiView somewhere when i touch a button, not when i release it.

3. What to use to create a mask with rounded corners over this buttons? The buttons stay on a rounded rectangle but the buttons itself are squared, so they look ugly in the corners of the matrix.

Answer 1

1. You can assign each button unique tag, e.g.

   myNewButton.tag = myNewTag; ++myNewTag;

then in your IBAction method you can get sender's tag (via (UIButton*)sender.tag) and proceed accordingly.

1. there's UIControlEventTouchDown event. (you can see the complete event list in UIControl class reference in Control events section)

2. I usually just use images with rounded corners for buttons when needed (and set button type to custom)