Question

我有一个视图控制器，我在其中解析xml文件并在字典中获取其值，我试图获取标签中的值，但我的应用程序因显示此错误而崩溃{{ 1}}

我从字典中获取值的代码就是这些，

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFConstantString objectForKey:]: unrecognized selector sent to instance 0x10256a1b0'

如何删除此错误？这是我的字典，

 NSLog(@"string: %@", str);
NSDictionary *xmlDoc = [NSDictionary dictionaryWithXMLString:str];
NSLog(@"dictionary: %@", xmlDoc);

for (NSDictionary * oneCustomer in xmlDoc)
{
    // Create a new Customer record

    _lblID.text = [oneCustomer objectForKey:@"_id"];
    NSLog(@"Reg: %@ ",_lblID.text);

    _lblAlert.text = [oneCustomer objectForKey:@"_topic"];
    NSLog(@"Make: %@ ",_lblAlert.text);

    _lblxref.text = [oneCustomer objectForKey:@"xref"];

    NSLog(@"Type: %@ ",_lblxref.text);

    _lbltext.text = [oneCustomer objectForKey:@"text"];
    NSLog(@"Model: %@ ", _lbltext.text);

    _lblgraphic.text = [oneCustomer objectForKey:@"explanation"];
    NSLog(@"Model: %@ ",_lblgraphic.text);

    _lblprompt.text = [oneCustomer objectForKey:@"prompt"];
    NSLog(@"Model: %@ ",_lblprompt.text);

   _lblvoice.text = [oneCustomer objectForKey:@"_id"];
    NSLog(@"Model: %@ ", _lblvoice.text);

    //roils = [oneCustomer objectForKey:@"recommended oil"];
    //NSLog(@"Model: %@ ",roils);
}

我必须从这个字典中提取所有值的值，我该如何得到它？

Answer 1

我希望这可以帮到你，

-(void)fetchValuesFromDictioanry:(NSDictionary*)xmlDict
{
    for (NSString *string in [xmlDict allKeys])
    {
        if ([[xmlDict valueForKey:string] isKindOfClass:[NSDictionary class]])
        {
            [self fetchValuesFromDictioanry:[xmlDict valueForKey:string]];
        }
        else if ([[xmlDict valueForKey:string] isKindOfClass:[NSString class]])
        {

            if ([string isEqualToString:@"_id"] && [[xmlDict valueForKey:string] isKindOfClass:[NSString class]])
            {
                _lblID.text = [xmlDict valueForKey:@"_id"];
            }
            else
           {
               NSLog(@"%@", NSStringFromClass([[xmlDict valueForKey:string] class]));
           }
            NSLog(@"Model: %@ ", [xmlDict valueForKey:string]);

          //Set here other labels
        }
        else if ([[xmlDict valueForKey:string] isKindOfClass:[NSArray class]])
        {
            for (NSDictionary *dictionary in [xmlDict valueForKey:string]) {

                [self fetchValuesFromDictioanry:dictionary];
            }
        }
    }
}

你可以这样打电话，

[self fetchValuesFromDictioanry:xmlDoc];

NSInvalidArgumentException＆＃39;，原因：＆＃39; - [__ NSCFConstantString objectForKey：]：无法识别的选择器发送到实例0x10256a1b0＆＃39;

1 个答案: