Question

I have a tab bar controller with 3 tabs. In one of the tabs, the view is a uiviewcontroller. I wish to add a button inside the view so when I click into the tab the button is displayed. How can I do this without the interface builder???

Answer 1

In your view controller,

 UIButton *aButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
 aButton.frame = CGRectMake(10,20,200,30);
 [aButton setTitle:@"My BUTTON" forState:UIControlStateNormal];
 [aButton addTarget:self action:@selector(buttonPushed) forControlEvents:UIControlEventTouchUpInside];
 [self.view addSubview:aButton];

Then you need to implement the buttonPushed method to do whatever the button is supposed to do.