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;
}
并保存它：
[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造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！
2 回答
在plist中，键必须是字符串 . 由于NSUserDefaults由plist支持，因此它会强制执行该限制 .
作为旁注，我认为使用
[@{...} mutableCopy]会更清楚 .NSUserDefault仅支持NSString，NSNumber，NSDate，NSArray，NSDictionary，BOOL，NSInteger，NSFloat等基本数据类型 .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 . 如果包含自定义数据类型，则需要转换为
NSData存储 . This is my test demo