[ios]NSArray中的数据进行排序 sortedArrayUsingDescriptors

//组装数据
array=[[NSMutableArray alloc] initWithCapacity:11];

NSMutableDictionary *dir6=[[NSMutableDictionary alloc] initWithCapacity:1];
[dir6 setObject:@"曹磊" forKey:@"FriendName"];
[dir6 setObject:@"曹磊" forKey:@"FriendID"];
[array addObject:dir6];
[dir6 release];

NSMutableDictionary *dir=[[NSMutableDictionary alloc] initWithCapacity:1];
[dir setObject:@"王军" forKey:@"FriendName"];
[dir setObject:@"曹磊" forKey:@"FriendID"];
[array addObject:dir];
[dir release];

NSMutableDictionary *dir1=[[NSMutableDictionary alloc] initWithCapacity:1];
[dir1 setObject:@"111" forKey:@"FriendName"];
[dir1 setObject:@"曹磊" forKey:@"FriendID"];
[array addObject:dir1];
[dir1 release];

NSMutableDictionary *dir2=[[NSMutableDictionary alloc] initWithCapacity:1];
[dir2 setObject:@"王兴朝" forKey:@"FriendName"];
[dir2 setObject:@"曹磊" forKey:@"FriendID"];
[array addObject:dir2];
[dir2 release];

NSMutableDictionary *dir3=[[NSMutableDictionary alloc] initWithCapacity:1];
[dir3 setObject:@"wangjun" forKey:@"FriendName"];
[dir3 setObject:@"曹磊" forKey:@"FriendID"];
[array addObject:dir3];
[dir3 release];

NSMutableDictionary *dir4=[[NSMutableDictionary alloc] initWithCapacity:1];
[dir4 setObject:@"apk" forKey:@"FriendName"];
[dir4 setObject:@"曹磊" forKey:@"FriendID"];
[array addObject:dir4];
[dir4 release];


self.myArray=array;
[array release];
NSLog(@">>>>>>排序前>>>>>>>>");
for (int i=0; i<[self.myArray count]; i++) {
NSLog(@"%@",[[self.myArray objectAtIndex:i] objectForKey:@"FriendName"]);
}

NSSortDescriptor *sorter = [[NSSortDescriptor alloc] initWithKey:@"FriendName" ascending:YES];
NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:&sorter count:1];
NSArray *sortedArray = [self.myArray sortedArrayUsingDescriptors:sortDescriptors];

[sorter release];

NSLog(@"\n\n\n\n\n>>>>>>排序后>>>>>>>>");
for (int i=0; i<[sortedArray count]; i++) {
NSLog(@"%@",[[sortedArray objectAtIndex:i] objectForKey:@"FriendName"]);
}

http://wangjun.easymorse.com/?p=1294