如何将对象数组添加到nsmutabledictionary,并将另一个数组作为键

Question

for(Attribute* attribute in appDelegate.attributeArray) {
    attribute = [appDelegate.attributeArray objectAtIndex:z];
    attri = attribute.zName;
    int y = 0;
    for(Row* r in appDelegate.elementsArray) {
        r = [appDelegate.elementsArray objectAtIndex:y];
        NSString *ele = r.language;
        if([attri isEqualToString:ele]) {
            NSLog(@"=================+++++++++++++++++%@ %@",attri, r.user);
            [aaa insertObject:r atIndex:y]; //here i am adding the value to array
            [dict setObject:aaa forKey:attri]; //here i am adding the array to dictionary
        }
        y++;
    }
    z++;
    NSLog(@"============$$$$$$$$$$$$$$$$$$$$$$$++++++++++ %@",dict);
}

键入一个数组,另一个数组中的值和值数组是对象格式.

我需要为单个键存储多个对象.在attributeArray有键值和elementsArray拥有的对象.例如,attributeArray可能具有值

 " English, French, German..."

而elementsArray可能具有对象值

"<Row: 0x4b29d40>, <Row: 0x4b497a0>, <Row: 0x4e38940>, <Row: 0x4b2a070>, <Row: 0x4b29ab0>, <Row: 0x4b178a0> "

在第一个值中,我需要存储两个对象,对于第二个键,我需要存储3个对象,而第三个键需要在字典中存储最后两个对象.

Answer 1

对于超简化,您可以使用以下代码:

NSArray *keys = ...;
NSArray *values = ...;

NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithObjects: values forKeys: keys];

希望这可以帮助.

更新:

要在字典中存储单个键的多个值,只需使用NSArray/ NSMutableArray作为您的对象:

NSArray *keys = ...;
NSMutableDictionary *dict = [NSMutableDictionary dictionary];

for( id theKey in keys) 
{
  NSMutableArray *item = [NSMutableArray array];
  [item addObject: ...];
  [item addObject: ...];
  ...

  [dict setObject: item forKey: theKey];
}

如果您从一开始就不知道密钥的所有值,并且需要逐个添加它们,则可以使用以下方法:

NSMutableDictionary *dict = [NSMutableDictionary dictionary];

for( /*some cycling condition here */) 
{
  id keyToUse = ...;
  id valueToAdd = ...;

  id foundArray = [dict objectForKey: keyToUse];
  if ( nil == foundArray )
  {
    foundArray = [NSMutableArray array];
    [dict setObject: foundArray forKey: keyToUse];
  }

  [foundArray addObject: valueToAdd];
}