ios - 根据uiswitch状态显示数据

Question

我正在尝试根据用户是否选择了开关来显示数据。用户将能够选择一个或两个开关来同时打开或一个或另一个打开。然后将根据开关的状态显示数据。

我已经设法让它加载，但是它只显示来自 plist 文件中的敢数组的数据，并且无论开关处于哪个状态都显示不敢真或两者兼而有之。

- (IBAction)shownext:(id)sender {
    if (!self.plistArray) {
        NSString *path = [[NSBundle mainBundle] pathForResource:
                          @"data" ofType:@"plist"];  
        NSUserDefaults *defaults =[NSUserDefaults standardUserDefaults];
        if ([[defaults objectForKey:@"truthonoff"] isEqualToString:@"YES"] && [[defaults objectForKey:@"dareonoff"] isEqualToString:@"YES"]  ) {
            NSDictionary *plistDict1 = [[NSDictionary alloc] initWithContentsOfFile:path];
            NSArray * plistArray1 = plistDict1[@"truth"];
            NSDictionary *plistDict2 = [[NSDictionary alloc] initWithContentsOfFile:path];
            NSArray *plistArray2 = plistDict2[@"dare"];
            self.plistArray = [[plistArray1 arrayByAddingObjectsFromArray:plistArray2] mutableCopy];

        } else if ([[defaults objectForKey:@"truthonoff"] isEqualToString:@"YES"] ) {
            NSDictionary *plistDict3 = [[NSDictionary alloc] initWithContentsOfFile:path];
            NSArray *plistArray3 = plistDict3[@"truth"] ;
            self.plistArray = [plistArray3 mutableCopy];
            NSLog(@"%@", plistArray);
        } else ([[defaults objectForKey:@"dareonoff"] isEqualToString:@"YES"] ); {
            NSDictionary *plistDict4 = [[NSDictionary alloc] initWithContentsOfFile:path];
            NSMutableArray *plistArray4 = plistDict4[@"dare"];
            self.plistArray = [plistArray4 mutableCopy];
            NSLog(@"%@", plistArray);
        }
    }
}



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

    [defaults synchronize];
}

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

    [defaults synchronize];
}

这是我设置对象的代码

Answer 1

尝试使用 boolForKey 而不是 objectForKey。另一方面，为什么 else 有条件？:

if ([defaults boolForKey:@"truthonoff"] && [defaults boolForKey:@"dareonoff"]) {
     // Both true 
} else if ([defaults boolForKey:@"truthonoff"] && ![defaults boolForKey:@"dareonoff"]) {
     // truthonoff true, dareonoff false
} else if (![defaults boolForKey:@"truthonoff"] && [defaults boolForKey:@"dareonoff"]) {
     // truthonoff false, dareonoff true
} else {
     // Both false
} 

确保在 NSUserStandardDefaults 中存储 bool 值时做两件事:

使用 setBool setter :[[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"a_key"];

请记住同步标准用户默认值以保存值。