Question

我有<GridView.ItemContainerStyle> <Style TargetType="GridViewItem"> <Setter Property="HorizontalContentAlignment" Value="Stretch" /> </Style> </GridView.ItemContainerStyle>看起来像这样。我想将此Array传递给另一个ViewController并使用它的元素。但我对如何为每个元素添加键感到困惑。例如，NSMutableArray

有没有办法用键启动数组？或者我应该为此创建{@"bus_route_key":@"733"}吗？

NSDictionary

Answer 1

哇，嘿，Melbournian。

你应该有一个包含NSMutableDictionaries的NSMutableArray，并设置每个总线更加结构化：

(
  {
    "route": 733,
    "line_name": "Oakleigh - Box Hill via Clayton & Monash University & Mt Waverley",
    "stop": "Oakleigh Railway Station/Johnson St",
    "time": "2016-04-05T11:44:00Z"
  },

  //Insert other line dictionaries
)

Answer 2

目前，您的NSMutableArray包含NSArrays。在您的情况下，这些NSArray需要为NSDictionary或NSMutableDictionary。

然后你可以编辑bus_route_key例如第一个元素，如下所示： [[yourList objectAtIndex:0] setInteger:1337 forKey:@"bus_route_key"] 如果要设置字符串，则需要使用setObject

Answer 3

您可以将NSArray转换为NSDictionary，因为数组不包含键，值数组只有索引

Answer 4

我的代码会帮助您：）

  NSMutableArray *arrTitles = (NSMutableArray *)@[@{
     "route": 733,
     "line_name": "Oakleigh - Box Hill via Clayton & Monash University & Mt Waverley",
     "stop": "Oakleigh Railway Station/Johnson St",
     "time": "2016-04-05T11:44:00Z"
      },@{
    "route": 733,
    "line_name": "Oakleigh - Box Hill via Clayton & Monash University & Mt Waverley",
    "stop": "Oakleigh Railway Station/Johnson St",
    "time": "2016-04-05T11:44:00Z"
  }];

Answer 5

NSArray *mainArray = @[
 @[
  @733,
  @"Oakleigh - Box Hill via Clayton & Monash University & Mt Waverley",
  @"Oakleigh Railway Station/Johnson St",
  @"2016-04-05T11:44:00Z"
  ],
 @[
  @631,
  @"Southland - Waverley Gardens via Clayton & Monash University",
  @"Southland Shopping Centre/Karen St",
  @"2016-04-05T11:46:00Z"
  ],
 @[
  @703,
  @"Middle Brighton - Blackburn via Bentleigh & Clayton & Monash University (SMARTBUS Service)",
  @"Luntar Rd/Centre Rd",
  @"2016-04-05T11:50:00Z"
  ]
 ];

NSMutableArray *newArray = [NSMutableArray array];

for (NSArray *arr in mainArray) {

        NSDictionary *dict = @{
                               @"key1" : [arr objectAtIndex:0],
                               @"key2" : [arr objectAtIndex:1],
                               @"key3" : [arr objectAtIndex:2]
                               };

    [newArray addObject:dict];
}

DLOG(@"New Arr : %@", newArray);

//you can access by key like this

for (NSDictionary *dict in newArray) {

    DLOG(@"%@", [dict valueForKey:@"key1"]);
    DLOG(@"%@", [dict valueForKey:@"key2"]);
    DLOG(@"%@", [dict valueForKey:@"key3"]);
}

希望它能帮助你...... :)

Answer 6

使用下面的代码行：
NSMutableDictionary * dict2 = [[NSMutableDictionary alloc] initWithObjects：attributeValues forKeys：attributeKeys];

此处，attributeValues是值NSArray的{{1}}，而attributeKeys是键的NSDictionary。

请参阅以下参考链接：

http://hayageek.com/nsdictionary-nsmutabledictionary/

NSArray

如何将键添加到NSMutableArray

6 个答案: