Programmatically generating UIButtons and associat

问题:

How do I do if I want to programatically generate a set of buttons and then associate those with IBActions? It's easy if I add the buttons in Interface Builder, but that I cannot do for this case.

回答1:

The buttons have the method - (void)addTarget:(id)target action:(SEL)action forControlEvents:(UIControlEvents)controlEvents.

The code to use this would look like this:

UIButton *myButton = [[UIButton alloc] init...];
[myButton addTarget:something action:@selector(myAction) forControlEvents:UIControlEventTouchUpInside];

This assumes that your IBAction is named myAction and that something is the controller for which that action is defined.

回答2:

First, create the button:

UIButton * btn;

btn = [ [ UIButton alloc ] initWithFrame: CGRectMake( 0, 0, 200, 50 ) ];

Then adds an action:

[ btn addTarget: self action: @selector( myMethod ) forControlEvents: UIControlEventTouchDown ];

Then adds the button to a view:

[ someView addSubView: btn ];
[ btn release ];

UIControl reference UIButton reference