UISwitch

/*
简单创建一个UISwitch，然后调用了theSymbleOfSwitch:函数来判断switch的开关状态
*/
- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
    
    //初始化一个switch
    UISwitch *mySwitch = [[UISwitch alloc] initWithFrame:CGRectMake
                          (100.0f, 100.0f, 0.0f, 0.0f)];
    [mySwitch addTarget:self
                 action:@selector(theSymbleOfSwitch:)
       forControlEvents:UIControlEventValueChanged];  //这里的UIControlEventValueChanged以后经常会用
    [self.view addSubview:mySwitch];
   
}

-(void) theSymbleOfSwitch:(UISwitch *)paramSender    //判断switch的开关状态
{
    NSLog(@"Sender is = %@",paramSender);
    if ([paramSender isOn]) {
        NSLog(@"the Switch is on");
    }
    else
    {
        NSLog(@"the Switch is off");
    }
}


/*
输出结果：
2013-10-11 10:09:35.402 WillSendToGithub[1109:a0b] Sender is = <UISwitch: 0xa2584a0; frame = (100 100; 51 31); layer = <CALayer: 0xa259da0>>
2013-10-11 10:09:35.403 WillSendToGithub[1109:a0b] the Switch is on
2013-10-11 10:09:45.121 WillSendToGithub[1109:a0b] Sender is = <UISwitch: 0xa2584a0; frame = (100 100; 51 31); layer = <CALayer: 0xa259da0>>
2013-10-11 10:09:45.121 WillSendToGithub[1109:a0b] the Switch is off
*/