You can copy two files (MTOnOffControl.h/.m) into your project and start to use.
1-You can create an MTOnOffControl with a view's frame which you want to show in.
MTOnOffControl *onOffControl = [[MTOnOffControl alloc] initWithFrame:self.onOffView.bounds];
2-You can set the on/off images.
onOffControl.onImage = [UIImage imageNamed:@"1_on.png"];
onOffControl.offImage = [UIImage imageNamed:@"1_off.png"];
3-You need to add the control as a subview in view.
[self.onOffView addSubview:onOffControl];
You can add an observer for the value(isOn) changed.
[onOffControl addObserver:self forKeyPath:@"isOn" options:0 context:NULL];
