根据另一个uiswitch的状态更改uiswitch

Question

我基本上有两个开关按钮，我希望用户从两个玩家或组播玩家中进行选择。但是，我不希望用户能够选择这些如此理想的时候，当用户点击另一个关闭。最好怎么实现呢？

-(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

您是否对两台交换机都有参考？ 如果是的话，这将是这样的：

-(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]; 
} 

，但如果你想有两个开关可以关闭，那么你只需要改变它

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

Answer 2

您将与志愿实现这个。您可以在以下网址找到文档：https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/KeyValueObserving/Articles/KVOCompliance.html。但我建议你不要。

对于这些类型的操作，您应该执行一些UISegmentedControl。你为什么不看看：https://developer.apple.com/library/ios/documentation/uikit/reference/UISegmentedControl_Class/Reference/UISegmentedControl.html。