Hello,
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.
Thanks in advance!
A:
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 ];
Macmade
2010-03-03 09:41:47
+1
A:
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 my action and that something is the controller for which that action is defined.
mrueg
2010-03-03 09:42:57
When speciying a selector for a UIButton do you have to name a method with a single argument, the selected buttons id? What would happen if I specified a method with no args?
mmccomb
2010-03-03 11:09:48
Great, thanks! I'll try this out but this looks like what I am looking for.
Nicsoft
2010-03-03 12:19:00
@mattmccomb: From the documentation: "The action message may optionally include the sender and the event as parameters, in that order." You can have a method with zero, one or two arguments as the action. But don't forget to add the : at the end of the action name for each argument.
mrueg
2010-03-03 16:09:10