iOS下radiobutton如何保存选中状态，并且在下次启动app时默认

- (void)viewDidLoad {

    [super viewDidLoad];

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

    self.RadioButton1.selected = [defaults boolForKey:@"radiobutton"];

    self.RadioButton2.selected = [defaults boolForKey:@"radiobutton"];

    self.RadioButton3.selected = [defaults boolForKey:@"radiobutton"];

    [self.RadioButton1 addTarget:self action:@selector(RadioButton1) forControlEvents:(UIControlEventValueChanged)];

    [self.view addSubview:self.RadioButton1];

    // Do any additional setup after loading the view.

}





- (IBAction)onRadioBtn:(RadioButton *)sender {

    _statusLabel.text = [NSString stringWithFormat:@"%@",sender.titleLabel.text];

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

    BOOL isSelected=[[NSUserDefaults standardUserDefaults]boolForKey:@"radiobutton"];

    isSelected=!isSelected;

    [defaults setBool:sender.selected forKey:@"radiobutton"];

   [defaults synchronize];

}



@end