Question

我有一个实现NSCoding的自定义对象，它看起来像这样（当然简化）：

@implementation FooBarThing

    @synthesize foo = _foo;
    @synthesize bar = _bar;

    - (instancetype)initWithCoder:(NSCoder *)coder
    {
        self = [super init];
        if (self) {
            _foo = [[coder decodeObjectForKey:FOO] retain];
            _bar = [[coder decodeObjectForKey:BAR] retain];
        }
        return self;
    }

    - (void)encodeWithCoder:(NSCoder *)coder
    {
        [coder encodeObject:self.foo forKey:FOO];
        [coder encodeObject:self.bar forKey:BAR];
    }
@end

目前我将自定义类的数组保存到NSUserDefaults，如下所示：

-(void)saveResults:(NSArray *)results
{
    NSData *data = [NSKeyedArchiver archivedDataWithRootObject:results];
    [[NSUserDefaults standardUserDefaults] setObject:data forKey:@"RESULTS"];
    [[NSUserDefaults standardUserDefaults] synchronize];
}

-(NSArray*)readResults
{
    NSData *results = [[NSUserDefaults standardUserDefaults] objectForKey:@"RESULTS"];
    NSArray *resultsArray = [NSKeyedUnarchiver unarchiveObjectWithData:results];
    return resultsArray;
}

我想要做的是将结果数组存储在字典中，用字符串键入：

-(void)saveResults:(NSArray *)scanResults  forKey:(NSString *)key
{
    ???
}

-(NSArray*)readResults:(NSString *) key
{
    ???
}

让麻烦得到正确的语法，我开始相信我只是在想这个，所以帮助就会得到帮助！谢谢！

-

编辑：

我已经解决了这个问题，只是暂时失误就很简单了。也许不是最好的选择，所以可以提出改进建议！

-(void)saveResults:(NSArray *)results forKey:(NSString *)key
{
    NSMutableDictionary* dict = [NSMutableDictionary dictionaryWithDictionary:[self getResultsDict]];
    NSData *data = [NSKeyedArchiver archivedDataWithRootObject:results];
    if(dict == nil){
        dict = [NSMutableDictionary dictionaryWithObject:data forKey:key];
    }else{
        [dict setObject:data forKey:key];
    }

    NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
    [userDefaults setObject:dict forKey:@"RESULTS_DICT"];
    [userDefaults synchronize];
}

-(NSArray*)readFullResults:(NSString *)key
{
    NSDictionary *dict = [self getResultsDict];
    NSArray *result = nil;
    if(dict != nil){
        [dict objectForKey:key];
        NSData *data = [dict objectForKey:key];;
        result = [NSKeyedUnarchiver unarchiveObjectWithData: data];
    }
    return result;
}

-(NSArray*) getDates
{
    NSDictionary *dict = [self getResultsDict];
    if(dict != nil)
    {
        return [dict allKeys];
    }
    return nil;
}

- (NSDictionary*)getResultsDict{
    NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
    NSMutableDictionary *resultsDict = [userDefaults objectForKey:@"RESULTS_DICT"];
    return resultsDict;

}

Answer 1

也许我误解了你，因为考虑到你已经完成的事情，问题似乎太简单了......

-(void)saveResults:(NSArray *)scanResults  forKey:(NSString *)key
{
    self.aDictionaryProperty[key] = scanResults;
}

-(NSArray*)readResults:(NSString *) key
{
    return self.aDictionaryProperty[key];
}

Answer 2

我已经解决了这个问题：

list(f)

将自定义NSCoding对象的字典保存到NSUserDefaults

2 个答案: