Add UISwitch with code.

1. 在「tableView:cellForRowAtIndexPath:」裡加入

UISwitch *switchControl = [[UISwitch alloc] initWithFrame:CGRectMake(1.0, 1.0, 20.0, 30.0)];

switchControl.on = NO;

[switchControl addTarget:self action:@selector(switchChanged:) forControlEvents:UIControlEventValueChanged];

cell.accessoryView = switchControl;

2. 再新增這個method

- (void) switchChanged:(id)sender {

    UISwitch *switchControl = sender;

    NSLog( @"The switch is %@", switchControl.on ? @"ON" : @"OFF" );

}

就完成了！！！

更詳細的請看蘋果官方文件