#import <UIKit/UIKit.h>
@interface ViewController : UIViewController<UITableViewDataSource,UITableViewDelegate>
@property (retain, nonatomic) IBOutlet UITableView *tbl;
@property (nonatomic,retain) NSMutableDictionary *tblDictionary;
@property (nonatomic,retain)NSMutableArray *keyArray;
@property (nonatomic,retain)NSMutableArray *tableArray;
@property (nonatomic,retain)NSMutableArray *filteredArray;
@end
5) Now open ViewController.m
implement the following method
i) - (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
// This method is used to create headers of section
ii) -(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
// This method is used to define number of sections
iii)- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
// This method is used for number of rows in each section
we are using a custom method that fill the values of array in dictionary.
6) Now Modified The code of ViewController.m as
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
@synthesize tableArray;
@synthesize filteredArray;
@synthesize tblDictionary;
@synthesize keyArray;
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
UIView *header=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 20)];
[header setBackgroundColor:[UIColor blackColor]];
UILabel *lbl=[[UILabel alloc]initWithFrame:CGRectMake(20, 0, 320, 20)];
[header addSubview:lbl];
[lbl setTextColor:[UIColor whiteColor]];
[lbl setBackgroundColor:[UIColor clearColor]];
[lbl setText:[keyArray objectAtIndex:section]];
return header;
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [keyArray count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSArray *ary=[self.tblDictionary valueForKey:[keyArray objectAtIndex:section]];
return [ary count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"Cell"];
NSString *key=[keyArray objectAtIndex:[indexPath section]];
NSArray *array=(NSArray *)[self.tblDictionary valueForKey:key];
NSString *cellTitle=[array objectAtIndex:[indexPath row]];
[cell.textLabel setText:cellTitle];
return cell;
}
-(NSMutableDictionary *)fillingDictionary:(NSMutableArray *)ary
{
// This method has the real magic of this sample
keyArray=[[NSMutableArray alloc]init];
[keyArray removeAllObjects];
NSMutableDictionary *dic=[[NSMutableDictionary alloc]init];
// First sort the array
[ary sortUsingSelector:@selector(compare:)];
// Get the first character of your string which will be your key
for(NSString *str in ary)
{
char charval=[str characterAtIndex:0];
NSString *charStr=[NSString stringWithUTF8String:&charval];
if(![keyArray containsObject:charStr])
{
NSMutableArray *charArray=[[NSMutableArray alloc]init];
[charArray addObject:str];
[keyArray addObject:charStr];
[dic setValue:charArray forKey:charStr];
}
else
{
NSMutableArray *prevArray=(NSMutableArray *)[dic valueForKey:charStr];
[prevArray addObject:str];
[dic setValue:prevArray forKey:charStr];
}
}
return dic;
}
- (void)viewDidLoad
{
[super viewDidLoad];
NSMutableArray *ary=[[NSMutableArray alloc]init];
[ary addObject:@"gfwfhlr"];
[ary addObject:@"irofhqrlo"];
[ary addObject:@"gfwtgfhlr"];
[ary addObject:@"gegirofgewghqrlo"];
[ary addObject:@"dsfgverg"];
[ary addObject:@"gergqrlo"];
[ary addObject:@"gregerg"];
[ary addObject:@"gegqrlo"];
[ary addObject:@"getwgtgt"];
[ary addObject:@"uyuqrlo"];
[ary addObject:@"hmnjmj"];
[ary addObject:@"mjhmghqrlo"];
[ary addObject:@"mjmjm"];
[ary addObject:@"irofhmjmjqrlo"];
[ary addObject:@"sgfwfhlr"];
[ary addObject:@"daimrofh;qrlo"];
[ary addObject:@"fgfwfhlr"];
[ary addObject:@"girofhqrlo"];
[ary addObject:@"hgfwfhlr"];
[ary addObject:@"jirofhqrlo"];
[ary addObject:@"kgfwfhlr"];
[ary addObject:@"lirofhqrlo"];
self.tblDictionary =[self fillingDictionary:ary];
[self.tbl reloadData];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)dealloc {
[_tbl release];
[super dealloc];
}
@end
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