Ios NSUserDefaults setObject:forKey:尝试插入非属性列表对象

我想我在这里做了一些非常明显的错误，但我不明白！我正试图在iOS 7.1上将包含NSString、NSNumber和NSBooleans的NSMutableDictionary保存到NSUserDefaults中

以下是字典的定义：

- (NSMutableDictionary *)hotLevelsDict
{
    if ( (!_hotLevelsDict) || ([_hotLevelsDict count] < 1) )
    {
        _hotLevelsDict = [NSMutableDictionary dictionaryWithDictionary:
                          @{@100: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @20, @"points": @50, @"complete": @NO}],
                            @200: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @20, @"points": @100, @"complete": @NO}],
                            @500: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @20, @"points": @200, @"complete": @NO}],
                            @1000: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @20, @"points": @200, @"complete": @NO}],
                            @2000: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @20, @"points": @500, @"complete": @NO}],
                            @5000: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @20, @"points": @1000, @"complete": @NO}],
                            @10000: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @20, @"points": @1000, @"complete": @NO}],
                            @20000: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @10, @"points": @1000, @"complete": @NO}],
                            @50000: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @20, @"points": @1000, @"complete": @NO}],
                            @100000: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @20, @"points": @1000, @"complete": @NO}],
                            @200000: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @20, @"points": @1000, @"complete": @NO}],
                            @300000: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @20, @"points": @1000, @"complete": @NO}],
                            @400000: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @20, @"points": @1000, @"complete": @NO}],
                            @500000: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @20, @"points": @1000, @"complete": @NO}],
                            @600000: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @20, @"points": @1000, @"complete": @NO}],
                            @700000: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @20, @"points": @1000, @"complete": @NO}],
                            @800000: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @20, @"points": @1000, @"complete": @NO}],
                            @900000: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @5, @"points": @50000, @"complete": @NO}],
                            @950000: [NSMutableDictionary dictionaryWithDictionary:@{@"time": @2, @"points": @50000, @"complete": @NO}]
                            }];
    }

    return _hotLevelsDict;
}

我试着打印字典中所有子对象的类，它们都是标准的，而且我对另一个以非常相似的方式构造的字典也做了同样的事情，效果很好

有人能指出我的错误吗

---

谢谢

在plist中，键必须是字符串。由于NSUserDefaults由plist支持，因此它强制执行该限制

---

作为旁注，我认为使用

[{…}mutableCopy]

nsserdefault

只支持

NSString

，

NSNumber

，

NSDate

，

NSArray

，

NSDictionary

，

BOOL

，

NSInteger

，

NSFloat

和其他基本数据类型

---

如果这些收集类型包含其他非系统数据类型，它们仍然可能导致崩溃。如果包含自定义数据类型，则需要转换为

NSData

存储

啊，太棒了！谢谢还有一个关于mutableCopy的好提示谢谢：）我也面临同样的问题。您能否澄清一下，是否可以使用NSUserDefaults将字典作为对象保存到字符串键？@TechSavy是的，您可以将字典作为值，但该字典中的每个键也必须是字符串。@Kevin。。基本上，字典中的每个键都必须有一个非NSNull类的值。任何类型的值都可以满足我的猜测？@techsavy否，请参阅允许的类型。基本上，每个键都必须是NSString，值只能是NSString、NSNumber、NSDate、NSData或NSArray或NSDictionary，其中的所有对象都必须遵循相同的规则。

[defaults setObject:self.hotLevelsDict forKey:@"hotLevelsDict"];