ios - 根据另一个 uiswitch 的状态更改 uiswitch

Question

我基本上有两个切换按钮，我希望用户从两个播放器或组播放中进行选择。但是，我不希望用户能够在用户单击其中一个时理想地选择这两个，而另一个则关闭。如何最好地实现这一点？

  -(void)stateSwitchedtwoplayer:(id)sender {
        UISwitch *tswitch = (UISwitch *)sender;
        NSUserDefaults *defaults =[NSUserDefaults standardUserDefaults];
        [defaults setObject: tswitch.isOn ? @"YES" : @"NO" forKey:@"twoplayerswitch"];


        [defaults synchronize];
    }

    -(void)stateSwitchedgroup:(id)sender {
        UISwitch *tswitch = (UISwitch *)sender;
        NSUserDefaults *defaults =[NSUserDefaults standardUserDefaults];
        [defaults setObject: tswitch.isOn ? @"YES" : @"NO" forKey:@"groupswitch"];

        [defaults synchronize];
    }

Answer 1

你有两个开关的引用资料吗？如果是，它将是这样的:

-(void)stateSwitchedtwoplayer:(id)sender {
    UISwitch *tswitch = (UISwitch *)sender;
    self.switchGroup.on =! tswitch.isOn; //reference to group switch
    NSUserDefaults *defaults =[NSUserDefaults standardUserDefaults];
    [defaults setBool: tswitch.isOn forKey:@"twoplayerswitch"];
    [defaults setBool: !tswitch.isOn forKey:@"groupswitch"];

    [defaults synchronize];
}

-(void)stateSwitchedgroup:(id)sender {
    UISwitch *tswitch = (UISwitch *)sender;
    self.switchTwoPlayer.on =! tswitch.isOn; //reference to two players switch
    NSUserDefaults *defaults =[NSUserDefaults standardUserDefaults];
    [defaults setBool: tswitch.isOn forKey:@"groupswitch"];
    [defaults setBool: tswitch.isOn forKey:@"twoplayerswitch"];
    [defaults synchronize];
}

但是如果你希望两个开关都可以关闭，那么你只需要将它打开

self.switchGroup.on =! tswitch.isOn == YES; //reference to group switch
self.switchTwoPlayer.on =! tswitch.isOn == YES; //reference to two players switch