How can I create an interaction with a URL by clicking a button in objective c?

Question

I'm trying to make an app for iphone which will send a tcp connection to a specified urf (or web application). I want the button to firstly give an allert before sending. I wrote this code for this:

-(IBAction)tiklandi:(id)sender{
NSString *buton1 = [sender titleForState:UIControlStateNormal];
NSString *uyariText = [[NSString alloc] initWithFormat:@"istek gönderiliyor!"];
UIAlertView *alert= [[UIAlertView alloc]initWithTitle:@"Sunucuya Gönderildi" message:uyariText delegate:nil
    cancelButtonTitle:@"işlemi iptal ettiniz!"
                                    otherButtonTitles: nil];
[alert show];
//[alert release];

but I couldn't use any url methods in my code.

My second question is, I can't see my Interface builder in Developer directory and also in project navigator of Xcode I can't see folders, all the classes come mixed between each other. I use Xcode 4.2, and I'm new with all these, can anyone please help?

---

I tried the listed solutions but I dont know how to interact my view controller files and .xib file. Here is my view controller .h file:

@interface ViewController : UIViewController


@property (nonatomic, retain) NSURLRequest *url;
@property (nonatomic,retain) UIButton *buton;


-(IBAction)fonksiyon:(id)sender;
@end

and this is my implementation file (of view control .. .m)

#import "ViewController.h"

@implementation ViewController

@synthesize buton;
@synthesize url;



-(IBAction)fonksiyon:(id)sender{

    NSString *buton= [sender titleForState:UIControlStateNormal];
    NSURL *url= [sender url];
    NSString *uyariText= [[NSString alloc] initWithFormat:@"gönderiliyor!"];
    UIAlertView *alertView= [[UIAlertView alloc]initWithTitle:@"Sunucuya Gönderildi" 
                                                  message:uyariText
                                                 delegate:self
                                        cancelButtonTitle:@"işlemi iptal ettiniz!" 
                                        otherButtonTitles:@"Server'a Git!", nil];

    - (NSURL)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
        if (buttonIndex != [alertView cancelButtonIndex]) {
            [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://192.168.69.290/cgi-bin/ipad.pl";nil]];
        }

    }

}

The problem is that I can not make a relation between .xib file and the other ones via File's Owner. As I understand, when I drag from file's owner I should see my function (here called fonksiyon) too. Can anyone help?

Answer 1

set the delegate to self when you create the UIAlertView and implement one of the UIAlertViewDelegate methods. Of course if you want to provide the option to cancel you need a "otherButtonTitle"

UIAlertView *alert= [[UIAlertView alloc]initWithTitle:@"Sunucuya Gönderildi" 
                                              message:uyariText
                                             delegate:self
                                    cancelButtonTitle:@"işlemi iptal ettiniz!" 
                                    otherButtonTitles:@"Go to website", nil];

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
    if (buttonIndex != [alertView cancelButtonIndex]) {
        // open url in external safari
        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://foo.bar"]];
        // EDIT: I might have misunderstood your question. 
        // you should read about NSURLConnection and put that code here.
    }
}

my second question is, i cant see my Interface builder in Developer directory

Interface Builder is no longer an extra application. It is now built-in to Xcode. You don't need to launch it, just select the xib file in Xcode.

and also in project navigator of Xcode i can't see folders, all the classes come mixed between each other.

Select the files you want to group, do a secondary click and select "New Group from Selection". You are responsible for grouping your files. When you have an existing group just drag&drop your files there.

Answer 2

1. You have to implement the delegate protocol for UIAlert to handle user's response. Then you'll be able to open the URL you want.

2. Interface Builder is no longer a separate application (since XCode v4)> Just open a XIB/NIB file in XC.

3. To open a URL in Safari mobile check this question: How can I launch Safari from an iPhone app?

4. If you want to open an URL inside your app you need to build your own UIWebView: http://developer.apple.com/library/ios/#documentation/uikit/reference/UIWebView_Class/