Local search in NSMutalbleArray - iphone

Question

I want to search in NSMutalbleArray, my code is :
arrCelebs=[[NSMutableArray alloc] initWithObjects:#"Test 1",#"Test 2",#"Test 42",#"Test 5", nil];
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
NSString *arrString1 = txtSearch.text;
NSRange tmprange;
for(NSString *string in arrCelebs) {
tmprange = [arrString1 rangeOfString:string];
if (tmprange.location != NSNotFound) {
NSLog(#"String found");
break;
}
}
return YES;
}
if i enter "t" then it search all the data and i want to add it another array. for display in tableview.

Answer 1

You can use the power of NSPredicate
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"SELF BEGINSWITH[c] %#", textField.text];
NSArray *filteredArray = [arrCelebs filteredArrayUsingPredicate:predicate];

Answer 2

By using predicate you Can easily get the result efficiently.
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"SELF beginswith[c] %#", txtSearch.text];
NSArray *ResultArray = [yourArray filteredArrayUsingPredicate:predicate];
return YES;
}

Answer 3

Try :
arr_NewArray = [[NSMutableArray alloc] init];
for (int i = 0; i < [arr_YourArrayToSearch count]; i++)
{
NSString *curString = [string lowercaseString];
NSString *curStringInArray = [[arr_YourArrayToSearch objectAtIndex:i]lowercaseString];
if (![curString rangeOfString:curStringSmall].location == NSNotFound)
{
[arr_NewArray addObject:[arr_YourArrayToSearch objectAtIndex:i]];
}
}
arr_NewArray will give you the array with data matched to your search string.

Answer 4

arrCelebs=[[NSMutableArray alloc] initWithObjects:#"Test 1",#"Test 2",#"Test 42",#"Test 5", nil];
_resultArray = [[NSMutableArray alloc] init];
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
NSString *arrString1 = txtSearch.text;
NSRange tmprange;
_resultArray = [[NSMutableArray alloc] init];
for(NSString *string in arrCelebs) {
tmprange = [arrString1 rangeOfString:string];
if (tmprange.location != NSNotFound) {
[_resultArray addObject:string];
}
}
return YES;
}

Answer 5

IF YOU work With UITableView then you cal also put this type of Logic.
Take Two NSMutableArray and add one array to another array in ViewDidLoad method such like,
self.listOfTemArray = [[NSMutableArray alloc] init]; // array no - 1
self.ItemOfMainArray = [[NSMutableArray alloc] initWithObjects:#"YorArrayList", nil]; // array no - 2
[self.listOfTemArray addObjectsFromArray:self.ItemOfMainArray]; // add 2array to 1 array
And Write following delegate Method of UISearchBar
- (BOOL) textFieldDidChange:(UITextField *)textField
{
NSString *name = #"";
NSString *firstLetter = #"";
if (self.listOfTemArray.count > 0)
[self.listOfTemArray removeAllObjects];
if ([searchText length] > 0)
{
for (int i = 0; i < [self.ItemOfMainArray count] ; i = i+1)
{
name = [self.ItemOfMainArray objectAtIndex:i];
if (name.length >= searchText.length)
{
firstLetter = [name substringWithRange:NSMakeRange(0, [searchText length])];
//NSLog(#"%#",firstLetter);
if( [firstLetter caseInsensitiveCompare:searchText] == NSOrderedSame )
{
// strings are equal except for possibly case
[self.listOfTemArray addObject: [self.ItemOfMainArray objectAtIndex:i]];
NSLog(#"=========> %#",self.listOfTemArray);
}
}
}
}
else
{
[self.listOfTemArray addObjectsFromArray:self.ItemOfMainArray ];
}
[self.tblView reloadData];
}
}
Output Show in your Consol.

Answer 6

This exact what you want...
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
NSMutableArray *resultAry = [[NSMutableArray alloc] init];
for(NSString *string in arrCelebs)
{
NSRange range = [string rangeOfString:textField.text options:NSCaseInsensitiveSearch];
if(range.location != NSNotFound)
{
[resultAry addObject:string];
}
}
yourTableAry=[resultAry mutableCopy];
[yourTable reloadData];
return YES;
}