//  方法1:NSComparator 
      
    NSArray *listGroupname = [self.listTeams sortedArrayUsingComparator:^(NSString *n1,NSString *n2) { 
          
        NSString *val1 = [[NSString alloc]init]; 
          
        NSString *val2 = [[NSString alloc]init]; 
          
        if (val1 > val2) { 
              
            return  NSOrderedAscending; 
              
        } else { 
              
            return NSOrderedDescending; 
              
        } 
      
    }]; 
    NSLog(@"%@",listGroupname);