how to make phone call by using objective c?

UIDevice *device = [UIDevice currentDevice];
if ([[device model] isEqualToString:@"iPhone"] ) {
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:[NSString stringWithFormat:@"tel:130-032-2837"]]];
} else {
    UIAlertView *Notpermitted=[[UIAlertView alloc] initWithTitle:@"Alert" message:@"Your device doesn't support this feature." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [Notpermitted show];
    [Notpermitted release];
}

fetch contact list from iPhone and send in JSON format

-(void)showPeoplePickerController

{

    

    ABAddressBookRef addressBook = ABAddressBookCreate();

    

    CFArrayRef allPeople = ABAddressBookCopyArrayOfAllPeople(addressBook);

    CFIndex nPeople = ABAddressBookGetPersonCount(addressBook);

    [menuArray removeAllObjects];

    if(menuArray ==nil)

        menuArray = [[NSMutableArray alloc] init];

    

    for (int i = 0; i < nPeople; i++) 

    {

        NSMutableDictionary *localDic=[[NSMutableDictionary alloc]init];

        ABRecordRef ref = CFArrayGetValueAtIndex(allPeople, i);

        

        //get firstname

        CFStringRef firstName = ABRecordCopyValue(ref, kABPersonFirstNameProperty);

        [localDic setObject:[NSString stringWithFormat:@"%@",firstName] forKey:@"first_name"];

        

        //get lastname

        CFStringRef lastName = ABRecordCopyValue(ref, kABPersonLastNameProperty);

        [localDic setObject:[NSString stringWithFormat:@"%@",lastName] forKey:@"last_name"];

        

        

        //get Phonenumber

        ABMutableMultiValueRef phoneNumbers = ABRecordCopyValue(ref, kABPersonPhoneProperty);

        CFTypeRef mobileNumber;

        NSString *mobileLabel;

        

        

        for (CFIndex i = 0; i < ABMultiValueGetCount(phoneNumbers); i++) {

            mobileLabel=[NSString stringWithFormat:@"%@",ABMultiValueCopyLabelAtIndex(phoneNumbers,i)];

            

            if([mobileLabel isEqualToString:@"_$!<Mobile>!$_"])

            {

                mobileNumber = ABMultiValueCopyValueAtIndex(phoneNumbers,i);

                [localDic setObject:[NSString stringWithFormat:@"%@",mobileNumber] forKey:@"Phone_Mobile"];

                

            }

            else if([mobileLabel isEqualToString:@"iPhone"])

            {

                mobileNumber = ABMultiValueCopyValueAtIndex(phoneNumbers,i);

                [localDic setObject:[NSString stringWithFormat:@"%@",mobileNumber] forKey:@"Phone_iPhone"];

            }

            else if([mobileLabel isEqualToString:@"_$!<Home>!$_"])

            {

                mobileNumber = ABMultiValueCopyValueAtIndex(phoneNumbers,i);

                [localDic setObject:[NSString stringWithFormat:@"%@",mobileNumber] forKey:@"Phone_Home"];

                

            }

            else if([mobileLabel isEqualToString:@"_$!<Work>!$_"])

            {

                mobileNumber = ABMultiValueCopyValueAtIndex(phoneNumbers,i);

                [localDic setObject:[NSString stringWithFormat:@"%@",mobileNumber] forKey:@"Phone_Work"];

                break;

            }

            

        }

        

        

        

        //get EmailId

        ABMutableMultiValueRef EmailIds = ABRecordCopyValue(ref, kABPersonEmailProperty);

        CFTypeRef EmailId;

        NSString *EmailLabel;

        

        

        for (CFIndex i = 0; i < ABMultiValueGetCount(EmailIds); i++) {

            EmailLabel=[NSString stringWithFormat:@"%@",ABMultiValueCopyLabelAtIndex(EmailIds,i)];

            

            if([EmailLabel isEqualToString:@"_$!<Home>!$_"])

            {

                EmailId = ABMultiValueCopyValueAtIndex(EmailIds,i);

                [localDic setObject:[NSString stringWithFormat:@"%@",EmailId] forKey:@"Email_Home"];

                

            }

            else if([EmailLabel isEqualToString:@"_$!<Work>!$_"])

            {

                EmailId = ABMultiValueCopyValueAtIndex(EmailIds,i);

                [localDic setObject:[NSString stringWithFormat:@"%@",EmailId] forKey:@"Email_Work"];

                break;

            }

        }

        

        

        //get Social Datas..

        ABMultiValueRef SocialProperty = ABRecordCopyValue(ref, kABPersonSocialProfileProperty);

        

        for (CFIndex i = 0; i < ABMultiValueGetCount(SocialProperty); i++) 

        {

            

            CFDictionaryRef dict = ABMultiValueCopyValueAtIndex(SocialProperty, i);

            NSString *service = [NSString stringWithFormat:@"%@",CFDictionaryGetValue(dict, @"service")];

           // NSLog(@"%@",dict);

            if([service isEqualToString:@"twitter"])

                [localDic setObject:[NSString stringWithFormat:@"%@",CFDictionaryGetValue(dict, @"username")] forKey:@"twitter_uname"];

            else if([service isEqualToString:@"facebook"])

                [localDic setObject:[NSString stringWithFormat:@"%@",CFDictionaryGetValue(dict, @"username")] forKey:@"facebook_uname"];

            else if([service isEqualToString:@"flickr"])

                [localDic setObject:[NSString stringWithFormat:@"%@",CFDictionaryGetValue(dict, @"username")] forKey:@"flickr_uname"];

            else if([service isEqualToString:@"linkedin"])

                [localDic setObject:[NSString stringWithFormat:@"%@",CFDictionaryGetValue(dict, @"username")] forKey:@"linkedin_uname"];

            

            CFRelease(dict);

        }

        

        //Get Address Detail Info..

        

        ABMultiValueRef addressProperty = ABRecordCopyValue(ref, kABPersonAddressProperty);

        

        for (CFIndex i = 0; i < ABMultiValueGetCount(addressProperty); i++) 

        {

            

            CFDictionaryRef dict = ABMultiValueCopyValueAtIndex(addressProperty, i);

            

            CFStringRef myCountryCode = CFDictionaryGetValue(dict, kABPersonAddressCountryCodeKey);

            [localDic setObject:[NSString stringWithFormat:@"%@",myCountryCode] forKey:@"Country_Code"];

            

            CFRelease(dict);

        }

        

        [menuArray addObject:localDic];

        [localDic release];

    }

   // NSLog(@"menuArray  %@",menuArray);

    

    NSDictionary *data = [NSDictionary dictionaryWithObjectsAndKeys:menuArray,@"contacts_info", nil];

    NSError *writeError = nil;

    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:data options:NSJSONWritingPrettyPrinted error:&writeError];

    NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

   // NSLog(@"JSON Output: %@", jsonString);

    

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc]initWithURL:[NSURL URLWithString:@"YOUR REQUEST URL"]];

    //NSLog(@"request..%@",request);

    NSURLConnection *connection = [[[NSURLConnection alloc] initWithRequest:request delegate:self] autorelease];

    [request release];

    [jsonString release];

    if (connection) {

       // NSLog(@"connection established");

    }

    

}

Call native iPhone code from UIWebView

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType

   if ( [request.mainDocumentURL.relativePath isEqualToString:@"/ur function name in HTML page"] ){

return NO;

    }

Detect phone number in webview

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType

{

   

    NSURL *url = request.URL;    

    NSString *numberstr = [url absoluteString];//convert url to string

    NSLog(@"str...%@",numberstr);

    

    

    

    if ([url.scheme isEqualToString:@"tel"]) {

        NSLog(@"request.URL.....%@",request.URL);

     

        

    }

How to get indexpath of button in a tableView row ?

NSIndexPath *indexPath =[self.YourTable indexPathForCell:(UITableViewCell *)[[sender superview] superview]];
   

Detecting a when a a UIScrollView reaches the bottom.

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
 if (scrollView.contentOffset.y == scrollView.contentSize.height - scrollView.frame.size.height) {
 // reached the bottom
 }
}

Getting subarray from Array

for (id element in CompleteArray) {
        if([element isKindOfClass:[NSArray class]]){
            NSMutableArray *Arr1 = [NSMutableArray arrayWithArray:element];
           
        }else {
            NSMutableArray *Arr2 = [NSMutableArray alloc]init];
            [Arr2 addObject:element];
           
        }
       
    }