Question

I have Six labels, I want to hide two label’s text randomly when a button is clicked.I am new to iphone,How do I do that?

Answer 1

The easiest thing to do is to associate an int to each label using the tag property. Then call viewWithTag and set the hidden property to YES. You can generate a random int between 1 and 6 using int i = (arc4random() % 6)+1;. To get two different ones, the easiest is just to do the same thing to define j until j and i are different.

Now an example:

-(IBAction)buttonPressed {
    for (int i=1; i<=6; ++i) {
        [[self.view viewWithTag:i] setHidden:NO];
    }
    int i = (arc4random() % 6)+1;
    int j = i;
    while (j==i) {
        j = (arc4random() % 6)+1;
    }
    [[self.view  viewWithTag:i] setHidden:YES];
    [[self.view  viewWithTag:j] setHidden:YES];
}