Question

我遇到了一个我不知道出了什么问题的问题。我有一个方法将信息保存到NSUserDefaults，然后另一种方法来检索它。但当我检索它时，出现了错误消息：

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSDictionary initWithObjects:forKeys:]: count of objects (0) differs from count of keys (19)'

我的保存方法是：

- (BOOL) grabAndSaveDataFromServerForPageCount: (int) pageCount
{
NSData * serverResponse = [NSData dataWithContentsOfURL:[NSURL URLWithString:[self getFetchURLStringForPageType:FindLocate_Pet withInfo:[NSString stringWithFormat:@"%i",pageCount]]]];

if (![[NSJSONSerialization JSONObjectWithData:serverResponse options:kNilOptions error:nil] objectForKey:@"Count"])
{
    //Server Error. Jump over updating process.
    serverResponse = nil;
}


if (serverResponse)
{
    //We'll re-organize the data to be display-friendly
    NSMutableDictionary * petsData = [NSJSONSerialization JSONObjectWithData:serverResponse options:kNilOptions error:nil];

    NSMutableDictionary * newDataToBeStored = [NSMutableDictionary dictionary];
    NSMutableArray * newGroupsOfIndividualPost = [NSMutableArray array];

    for (NSDictionary * individualPost in [petsData objectForKey:@"Content"])
    {
        NSMutableDictionary * newIndividualPost = [individualPost mutableCopy];

        //"ID"
        [newIndividualPost setObject:(NSString *)[individualPost objectForKey:@"ID"] forKey:@"ID"];

        //"TypeID"
        [newIndividualPost setObject:(NSString *)[individualPost objectForKey:@"TypeID"] forKey:@"TypeID"];

        //"Name"
        [newIndividualPost setObject:(NSString *)[individualPost objectForKey:@"Name"] forKey:@"Name"];

        //"GenderID"
        [newIndividualPost setObject:(NSString *)[individualPost objectForKey:@"GenderID"] forKey:@"GenderID"];

        //"Description"
        [newIndividualPost setObject:(NSString *)[individualPost objectForKey:@"Description"] forKey:@"Description"];

        //"PetsterTag"
        [newIndividualPost setObject:(NSString *)[individualPost objectForKey:@"PetsterTag"] forKey:@"PetsterTag"];

        //"Color"
        [newIndividualPost setObject:(NSString *)[individualPost objectForKey:@"Color"] forKey:@"Color"];

        //"Breed"
        [newIndividualPost setObject:(NSString *)[individualPost objectForKey:@"Breed"] forKey:@"Breed"];

        //"BreedName"
        [newIndividualPost setObject:(NSString *)[individualPost objectForKey:@"BreedName"] forKey:@"BreedName"];

        //"DOB"
        [newIndividualPost setObject:(NSString *)[individualPost objectForKey:@"DOB"] forKey:@"DOB"];

        //"DateCreated"
        [newIndividualPost setObject:(NSString *)[individualPost objectForKey:@"DateCreated"] forKey:@"DateCreated"];

        //"Lost"
        [newIndividualPost setObject:(NSString *)[individualPost objectForKey:@"Lost"] forKey:@"Lost"];

        //"LostMessage"
        [newIndividualPost setObject:(NSString *)[individualPost objectForKey:@"LostMessage"] forKey:@"LostMessage"];

        //"DateLost"
        [newIndividualPost setObject:(NSString *)[individualPost objectForKey:@"DateLost"] forKey:@"DateLost"];

        //"ImageURLCover"
        if ([(NSString *)[individualPost objectForKey:@"ImageURLCover"] length] > 0)
        {
            NSData * coverImageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:(NSString *)[individualPost objectForKey:@"ImageURLCover"]]];
            UIImage * coverImageConverted = [UIImage imageWithData:coverImageData];
            if (coverImageConverted)
            {
                [newIndividualPost setObject:coverImageConverted forKey:@"ImageURLCover"];
            }
            else
            {
                [newIndividualPost setObject:[UIImage imageNamed:@"no_image.png"] forKey:@"ImageURLCover"];
            }
        }


        //"Die"
        [newIndividualPost setObject:(NSString *)[individualPost objectForKey:@"Die"] forKey:@"Die"];

        //"DateDie"
        [newIndividualPost setObject:(NSString *)[individualPost objectForKey:@"DateDie"] forKey:@"DateDie"];

        //"Enabled"
        [newIndividualPost setObject:(NSString *)[individualPost objectForKey:@"Enabled"] forKey:@"Enabled"];



        //"MemberID"
        NSDictionary * dataToWrite = [individualPost objectForKey:@"MemberID"];

        NSMutableDictionary * newIndividualMemberDetail = [NSMutableDictionary dictionary];


        //"ID"
        [newIndividualMemberDetail setObject:(NSString *)[dataToWrite objectForKey:@"ID"] forKey:@"ID"];

        //"GenderID"
        [newIndividualMemberDetail setObject:(NSString *)[dataToWrite objectForKey:@"GenderID"] forKey:@"GenderID"];

        //"ProfileImageURL" - Incomplete URL. Would save simply as NSString
        [newIndividualMemberDetail setObject:(NSString *)[dataToWrite objectForKey:@"ProfileImageURL"] forKey:@"ProfileImageURL"];

        //"Name"
        [newIndividualMemberDetail setObject:(NSString *)[dataToWrite objectForKey:@"Name"] forKey:@"Name"];

        //"Company"
        [newIndividualMemberDetail setObject:(NSString *)[dataToWrite objectForKey:@"Company"] forKey:@"Company"];

        //"DOB"
        [newIndividualMemberDetail setObject:(NSString *)[dataToWrite objectForKey:@"DOB"] forKey:@"DOB"];

        //"NRIC"
        [newIndividualMemberDetail setObject:(NSString *)[dataToWrite objectForKey:@"NRIC"] forKey:@"NRIC"];

        //"Passport"
        [newIndividualMemberDetail setObject:(NSString *)[dataToWrite objectForKey:@"Passport"] forKey:@"NPassportRIC"];

        //"Nationality"
        [newIndividualMemberDetail setObject:(NSString *)[dataToWrite objectForKey:@"Nationality"] forKey:@"Nationality"];

        //"Username"
        [newIndividualMemberDetail setObject:(NSString *)[dataToWrite objectForKey:@"Username"] forKey:@"Username"];

        //"Password"
        [newIndividualMemberDetail setObject:(NSString *)[dataToWrite objectForKey:@"Password"] forKey:@"Password"];

        //"PhoneNo"
        [newIndividualMemberDetail setObject:(NSString *)[dataToWrite objectForKey:@"PhoneNo"] forKey:@"PhoneNo"];

        //"FaxNo"
        [newIndividualMemberDetail setObject:(NSString *)[dataToWrite objectForKey:@"FaxNo"] forKey:@"FaxNo"];

        //"MobileNo"
        [newIndividualMemberDetail setObject:(NSString *)[dataToWrite objectForKey:@"MobileNo"] forKey:@"MobileNo"];

        //"Email"
        [newIndividualMemberDetail setObject:(NSString *)[dataToWrite objectForKey:@"Email"] forKey:@"Email"];

        //"ShowFields" group of data
        NSString * jsonShowFields = [dataToWrite objectForKey:@"ShowFields"];

        NSString *jsonString = jsonShowFields;
        NSData *dataShowFields = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
        NSDictionary * showFields = [NSJSONSerialization JSONObjectWithData:dataShowFields options:0 error:nil];

        //"isName"
        if (![[showFields objectForKey:@"isName"] isKindOfClass:[NSNull class]])
        {
            [newIndividualMemberDetail setObject:(NSString *)[showFields objectForKey:@"isName"] forKey:@"isName"];
        }
        else
        {
            [newIndividualMemberDetail setObject:@"0" forKey:@"isName"];
        }


        //"isAge"
        if (![[showFields objectForKey:@"isAge"] isKindOfClass:[NSNull class]])
        {
            [newIndividualMemberDetail setObject:(NSString *)[showFields objectForKey:@"isAge"] forKey:@"isAge"];
        }
        else
        {
            [newIndividualMemberDetail setObject:@"0" forKey:@"isAge"];
        }


        //"isMobileNo"
        if (![[showFields objectForKey:@"isMobileNo"] isKindOfClass:[NSNull class]])
        {
            [newIndividualMemberDetail setObject:(NSString *)[showFields objectForKey:@"isMobileNo"] forKey:@"isMobileNo"];
        }
        else
        {
            [newIndividualMemberDetail setObject:@"0" forKey:@"isMobileNo"];
        }

        //"isContactNo"
        if (![[showFields objectForKey:@"isContactNo"] isKindOfClass:[NSNull class]])
        {
            [newIndividualMemberDetail setObject:(NSString *)[showFields objectForKey:@"isContactNo"] forKey:@"isContactNo"];
        }
        else
        {
            [newIndividualMemberDetail setObject:@"0" forKey:@"isContactNo"];
        }

        //"isPhoneNo"
        if (![[showFields objectForKey:@"isPhoneNo"] isKindOfClass:[NSNull class]])
        {
            [newIndividualMemberDetail setObject:(NSString *)[showFields objectForKey:@"isPhoneNo"] forKey:@"isPhoneNo"];
        }
        else
        {
            [newIndividualMemberDetail setObject:@"0" forKey:@"isPhoneNo"];
        }



        //Final copy
        [newIndividualPost setObject:newIndividualMemberDetail forKey:@"MemberID"];
        [newGroupsOfIndividualPost addObject:newIndividualPost];
    }


    [newDataToBeStored setObject:newGroupsOfIndividualPost forKey:@"Content"];
    [newDataToBeStored setObject:[petsData objectForKey:@"Count"] forKey:@"Count"];

    if (pageCount>1)
    {
        //Means this info grab should add into the existing backup and not to replace it.
        NSUserDefaults * storage = [NSUserDefaults standardUserDefaults];
        NSDictionary * existingData = (NSDictionary*) [NSKeyedUnarchiver unarchiveObjectWithData:[storage objectForKey:@"PetPageBackup"]];

        NSMutableDictionary * newExistingData = [existingData mutableCopy];
        [newExistingData addEntriesFromDictionary:newDataToBeStored];
        [storage setObject:[NSKeyedArchiver archivedDataWithRootObject:newExistingData] forKey:@"PetPageBackup"];

        [storage synchronize];

    }
    else
    {

        //Directly save to NSUserDefaults by packaging it to a NSData format
        NSUserDefaults * storage = [NSUserDefaults standardUserDefaults];
        [storage setObject:[NSKeyedArchiver archivedDataWithRootObject:newDataToBeStored] forKey:@"PetPageBackup"];

        [storage synchronize];
    }

    return YES;

}
else
{

    return NO;
}
}

我的检索方法是：

NSUserDefaults * storage = [NSUserDefaults standardUserDefaults];
NSDictionary * petsData = (NSDictionary*) [NSKeyedUnarchiver unarchiveObjectWithData:[storage objectForKey:@"PetPageBackup"]];

在最后一行是警告出现的地方。知道为什么会这样吗？

帮助！

编辑：

这是保存到NSUserDefaults之前“newDataToBeStored”变量的状态：

enter image description here

Answer 1

试试这个，

newIndividualPost = [[NSMutableDictionary alloc]initWithDictionary: individualPost];

希望这可以解决您的问题。

Answer 2

我认为你犯的是一个简单的错误，在你的for循环中你将字典实例化为NSMutableDictionary * newIndividualPost = [individualPost mutableCopy];意味着你没有创建任何新的新对象，而是创建了individualPost dictionary的副本并再次插入同样的对象一次又一次。因此，请将您的行NSMutableDictionary * newIndividualPost = [individualPost mutableCopy];替换为NSMutableDictionary * newIndividualPost = [NSMutableDictionary new];，这样就可以了。

Answer 3

 //"ImageURLCover"
if ([(NSString *)[individualPost objectForKey:@"ImageURLCover"] length] > 0)
{
   NSData * coverImageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:(NSString *)[individualPost objectForKey:@"ImageURLCover"]]];
    UIImage * coverImageConverted = [UIImage imageWithData:coverImageData];
   if (coverImageConverted)
 {
    [newIndividualPost setObject:coverImageConverted forKey:@"ImageURLCover"];
 }
  else
 {
    [newIndividualPost setObject:[UIImage imageNamed:@"no_image.png"] forKey:@"ImageURLCover"];
 }
}

iOS：对象计数（0）与键计数不同

3 个答案: