Alphabetical grouping sorted array

  . 1   
  2  
  . 3  // sort initials packet array 
  . 4  
  . 5 - (NSMutableArray *) sortObjectsAccordingToInitialWith: (NSArray * ) {ARR
   . 6  
  . 7      
  . 8  
  . 9      // initialize UILocalizedIndexedCollation 
10  
. 11      UILocalizedIndexedCollation collation * = [UILocalizedIndexedCollation currentCollation];
 12 is  
13 is      
14  
15      / / stars collation index number, here is 27 (a 26 letters and #) 
16  
. 17      NSInteger sectionTitlesCount = [[collation sectionTitles] COUNT];
 18 is  
. 19      //NewSectionsArray initialize an array used to store the resultant data, the data model we should eventually get the form @ [@ [In the beginning of the data array A], @ [B to the beginning of the data array], @ [C at the beginning of the data array], @ ... [# in data array (other) at the beginning]] 
20 is  
21 is      NSMutableArray newSectionsArray * = [[NSMutableArray the alloc] initWithCapacity: sectionTitlesCount];
 22 is  
23 is      
24  
25      // initializes an empty array 27 was added newSectionsArray 
26 is  
27      for (index NSInteger = 0 ; index <sectionTitlesCount; index ++ ) {
 28  
29          NSMutableArray Array * = [[NSMutableArray the alloc] the init];
 30  
31 is      }
 32  
33 is      
34 is  
35      // each section under a name assigned to
36  
37 [      for (* ContactsUserModel usermodel in _aryUser) {
 38 is  
39          // position where the value of the acquired name attribute, such as "Lin", the first letter is L, A ~ Z in the ranked 11 (the first bit is 0), sectionNumber to 11
 40  
41 is  //         attribute name trueName model corresponding to 
42 is  
43 is          
44 is  
45          NSInteger sectionNumber = [collation sectionForObject: usermodel collationStringSelector: @selector (trueName)];
 46 is  
47          // the name of "lindane" in the p-added newSectionsArray an array of 11 to 
48  
49          NSMutableArray * sectionNames = newSectionsArray [sectionNumber];
 50  
51 is         [sectionNames addObject: usermodel];
 52 is  
53 is          
54 is  
55          
56 is  
57 is          NSLog ( @ " sectionNames ===% @ " , sectionNames);
 58  
59          
60  
61 is      }
 62 is  
63 is      
64  
65      NSLog ( @ " newSectionsArray ==% @ " , newSectionsArray) ;
 66  
67      
68  
69      
70  
71 is      // Sort the array for each section in accordance with the attribute name 
72  
73 is      for (index NSInteger = 0 ; index <sectionTitlesCount; index ++ ) {
 74 
 75         NSMutableArray *personArrayForSection = newSectionsArray[index];
 76 
 77         NSArray *sortedPersonArrayForSection = [collation sortedArrayFromArray:personArrayForSection collationStringSelector:@selector(name)];
 78 
 79         newSectionsArray[index] = sortedPersonArrayForSection;
 80 
 81     }
 82 
 83     NSLog(@"newSectionsArray==%@",newSectionsArray);
 84 
 85  
 86 
 87     //    //删除空的数组
 88 
 89         NSMutableArray *finalArr = [NSMutableArray new];
 90 
 91     _sectionTitles =[NSMutableArray array];
 92 
 93     [_sectionTitles addObject:@"部门"];
 94 
 95     
 96 
 97  
 98 
 99         for (NSInteger index = 0; index < sectionTitlesCount; index++) {
100 
101             
102 
103             if (((NSMutableArray *)(newSectionsArray[index])).count != 0) {
104 
105                 [finalArr addObject:newSectionsArray[index]];
106  
107                  [self.sectionTitles addObject: [[collation sectionTitles] objectAtIndex: index]];
 108  
109                  
110  
111                  
112  
113              }
 114  
115          }
 1 16  
117      
1 18  
119      return finalArr; // delete no array value
 120  
121   
122  
123      
124  
125  / /     return newSectionsArray; 
126  
127   
128  
129  }
 130.  
131 is   
132  
134  
135  #pragma Mark SectionTitles
 136  
137 - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
138 
139 {
140 
141     return self.sectionTitles[section];
142 
143 }
144 
145  
146 
147 - (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView
148 
149 {
150 
151     return self.sectionTitles;
152 
153 }