UISwitcher

//同步属性和成员变量
@synthesize mySwitch = _mySwitch;

- (void)viewDidLoad {
    [super viewDidLoad];

    _mySwitch = [[UISwitch alloc]init];
    
    //宽高两个属性参数没有用，苹果自己定好了宽高
    _mySwitch.frame = CGRectMake(100, 100, 40, 40);
    
   // _mySwitch.on = YES;
    
    //set方式
    //[_mySwitch setOn:YES];
    
    [_mySwitch setOn:YES animated:YES];
    
    //设置开启状态时风格
    //[_mySwitch setOnTintColor:[UIColor blueColor]];
    
    //圆钮
    [_mySwitch setThumbTintColor:[UIColor redColor]];
    //整体
    [_mySwitch setTintColor:[UIColor blackColor]];
    
    [self.view addSubview:_mySwitch];
    
    
    [_mySwitch addTarget:self  action:@selector(swchanged:) forControlEvents:UIControlEventValueChanged];
    
    
}

-(void) swchanged:(UISwitch*) sw
{
    if(sw.on)
    {
           NSLog(@"Sw open");
    }
    else
    {
        NSLog(@"Sw closed");
    }
    
 
}

@interface ViewController : UIViewController
{
    //定义一个开关控件
    UISwitch* _mySwitch ;
}

@property (retain,nonatomic) UISwitch* mySwitch;