排序NSMutableArray？

Question

我想要sort NSMutableArray，它的结构是这样的，

Object1:NSMutableDictionary

   Affiliation = 2165;
   CallLetters = abc;
   Channel = "2.1";

   ChannelLocation = "";
   ChannelSchedules =         (
   );
   DisplayName = abc;
   DvbTriplets =         (
   );
   FullName = "bc";
   IconAvailable = 1;
   Order = 1;
   ParentNetworkId = 2;
   ServiceType = Digital;
   SourceAttributeTypes =        
       HD

   SourceId = 11222;
   SourceType = Broadcast;
   TiVoSupported = 1;
   Type = "24-Hours";

Object2:NSMutableDictionary

   Affiliation = 1209;
   CallLetters = "xyz";
   Chann?el = "4.1";

   ChannelLocation = "";
   ChannelSchedules =         (
   );
   DisplayName = "xyz";
   DvbTriplets =         (
   );
   FullName = "xyz";
   IconAvailable = 1;
   Order = 2;
   ParentNetworkId = 5;
   ServiceType = Digital;
   SourceAttributeTypes = HD

   SourceId = 111
   SourceType = Broadcast;
   TiVoSupported = 1;
   Type = "24-Hours";
   VirtualChannelNumber = "4.1";

... ..。。。./

该数组包含许多对象，而这些对象包含许多字典。我希望能够使用通道键“NSMutableDictionary”按升序排列上面的数组？

如何对数组进行排序？

Answer 1

使用NSSortDescriptor就可以了

    NSSortDescriptor *aSortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"Channel" ascending:YES];
   [yourarrayobject sortUsingDescriptors:[NSArray arrayWithObject:aSortDescriptor]];
    [aSortDescriptor release];

Answer 2

要对对象数组进行排序，请执行以下操作：

1. setup NSSortDescriptor -使用变量的名称作为键设置描述符以进行排序，外加对这些键执行的选择器
2. 使用已设置的NSSortDescriptor获取描述符数组
3. 根据这些描述符对数组进行排序

How to sort NSMutableArray using sortedArrayUsingDescriptors?