开关switch

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#import "ViewController.h"

@interface ViewController ()
//1先在这里创建switch对象
@property (strong,nonatomic) UISwitch *rightSwitch;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    CGRect screen = [[UIScreen mainScreen] bounds];
    //2然后再在这里设置switch的外观
    self.rightSwitch = [[UISwitch alloc] init];
    CGRect frame = self.rightSwitch.frame;
    frame.origin = CGPointMake(screen.size.width/2-20, 98);
    self.rightSwitch.frame = frame;
    self.rightSwitch.on = false;
    [self.rightSwitch addTarget:self action:@selector(switchValueChanged:) forControlEvents:UIControlEventValueChanged];
    [self.view addSubview:self.rightSwitch];
}

//3设置switch的方法
-(void)switchValueChanged:(id)sender{
    UISwitch *witchSwitch = (UISwitch *)sender;
    BOOL setting = witchSwitch.isOn;
    [self.rightSwitch setOn:setting animated:TRUE];
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


@end