为更多 uiSwitch 标签提供功能

Question

我想设置，如果我的发件人标签 0-6 的所有开关都关闭，应用程序会显示带有警告消息的警报，以打开至少一个开关。我现在有点不知道该怎么做。

if (switi.tag ==0 && switi.isOn == YES )
    { [self.navigationController popViewControllerAnimated:YES];
        [self willMoveToParentViewController:nil];
}else        if ((switi.tag ==1 && switi.isOn == YES)) {
            [self.navigationController popViewControllerAnimated:YES];
            [self willMoveToParentViewController:nil];

        } else if ((switi.tag ==2 && switi.isOn == YES)) {
            [self.navigationController popViewControllerAnimated:YES];
            [self willMoveToParentViewController:nil];

        } else if ((switi.tag ==3 && switi.isOn == YES)) {
            [self.navigationController popViewControllerAnimated:YES];
            [self willMoveToParentViewController:nil];

        } else if ((switi.tag ==4 && switi.isOn == YES)) {
            [self.navigationController popViewControllerAnimated:YES];
            [self willMoveToParentViewController:nil];

        } else if ((switi.tag ==5 && switi.isOn == YES)) {
            [self.navigationController popViewControllerAnimated:YES];
            [self willMoveToParentViewController:nil];

        } else if ((switi.tag ==6 && switi.isOn == YES)) {
            [self.navigationController popViewControllerAnimated:YES];
            [self willMoveToParentViewController:nil];

        } else {
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Please put at least one switch on." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
            [alert show];

        }

}

编辑

- (void)viewDidLoad
{
    [super viewDidLoad];



 CGFloat y = 110;
                int counter = 0;
                for (NSString *key in self.kejsss) {
                    UILabel *labeli = [[UILabel alloc] initWithFrame:CGRectMake(50, y, 150, 30)];
                    UISwitch *switi = [[UISwitch alloc] initWithFrame:CGRectMake(210, y, 70, 30)];

                    labeli.tag = counter;
                    switi.tag = counter;

                    labeli.text = key;
                    labeli.textColor = [UIColor whiteColor];
                    switi.on = [[self.konfiggg objectForKey:key] boolValue];
                    [switi addTarget:self action:@selector(switchChanged:) forControlEvents:UIControlEventTouchUpInside];

                    [self.view addSubview:labeli];
                    [self.view addSubview:switi];

                    self.viewtabulka.layer.borderColor = [UIColor whiteColor].CGColor;
                    self.viewtabulka.layer.borderWidth = 0.5;
                    CALayer *imageLayerRR3 = self.viewtabulka.layer;
                    [imageLayerRR3 setCornerRadius:5];
                    [imageLayerRR3 setBorderWidth:1];
                    [imageLayerRR3 setMasksToBounds:YES];
                    y += 40;
                    counter++;

        }
        }
    }
}
- (IBAction)switchChanged:(UISwitch *)sender{
    kokos= YES;
    [self.konfiggg setObject:@([sender isOn]) forKey:[self.kejsss objectAtIndex:sender.tag]];
    NSLog(@"Selected Switch - %ld (%@)", (long)sender.tag, self.kejsss[sender.tag]);
    NSLog(@"Selected object - %d", [sender isOn]);
}

Answer 1

这是一种方法。为方便起见，将所有开关组合成一个阵列。然后，每当其中一个开关更改值时，调用一个方法循环遍历数组中的所有开关并检查以确保至少有一个开关仍然打开。你可以这样做：

-(void)checkSwitches {
    // self.switches is an NSArray that holds pointers to all of your UISwitches
    for (UISwitch *s in self.switches) {
        if (s.on == YES) {
            return;
        }
    }
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Please put at least one switch on." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alert show];
}