Question

我觉得我在这里做的事情显然是错的，但我无法理解！我正在尝试将包含NSStrings和NSNumbers以及NSBooleans的NSMutableDictionary保存到iOS 7.1上的NSUserDefaults中。

这是字典定义：

- (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;
}

并保存：

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

我已经尝试打印字典中所有子对象的类，它们都是标准的，我也在用另一种以非常相似的方式构建的字典做同样的事情，它工作正常。

请有人指出我的错误吗？

谢谢！

Answer 1

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]会更清楚。

Answer 2

NSUserDefault仅支持NSString，NSNumber，NSDate，NSArray，NSDictionary，BOOL，{{1 }，NSInteger和其他基本数据类型。

如果这些集合类型包含其他非系统数据类型，则仍会导致崩溃。如果您包含自定义数据类型，则需要转换为NSFloat存储空间。 This is my test demo

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

2 个答案: