UISegmentedControl and registering callback without XIB

I have added a UISegmented control as follows (this seems to work just fine, but let me know if this is a bad practice):

mapType = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects: @"Map", @"Satelitte", @"Hybrid", nil]];    
[_mapView addSubview:mapType];

Then I have a method that I would like to be called when this UISegmentedControl is changed, however, I cannot set the delegate or anything in the interface builder because I am doing this programmatically.

- (void)segmentedChangedType {
/开发者_JAVA技巧/ some code here
}

How can I connect these? Thanks in advance for any help!

If the only solution is to use XIB, then I can do that, but would like to know how to do this if it's possible.

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OK, figured it out, you add this:

[mapType addTarget:self action:@selector(changeType) forControlEvents:UIControlEventValueChanged];