Using Reachability code to check internet connection

Discussion in 'iOS Programming' started by uaecasher, Dec 10, 2009.

  1. macrumors 65816

    uaecasher

    Joined:
    Jan 29, 2009
    Location:
    Stillwater, OK
    #1
    hello,

    I'm using the source of Reachability project given by apple to check if there is an internet connection, what I did is:

    1) Add the Reachability.h and .m from the sample to my project
    2) Add the SystemConfiguration.framework
    3) the added the following code in my controllerview.m

    Code:
    
    [[Reachability sharedReachability] setHostName:@"www.google.com"];
    
    	NetworkStatus internetStatus = [[Reachability sharedReachability] remoteHostStatus];
    	
    	if ((internetStatus != ReachableViaWiFiNetwork) && (internetStatus != ReachableViaCarrierDataNetwork))
    	{
    		UIAlertView *myAlert = [[UIAlertView alloc] initWithTitle:@"No Internet Connection" message:@"You require an internet connection via WiFi or cellular network for location finding to work." delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
    		[myAlert show];
    		[myAlert release];
    	}
    
    

    here is the my .m code:

    Code:
    
    #import "testPickerViewController.h"
    #import "Reachability.h"
    
    @implementation testPickerViewController
    
    @synthesize imgPicker;
    @synthesize imgPickerCam;
    
    
    
    
    -(void) viewDidLoad {
    	
    	[[Reachability sharedReachability] setHostName:@"www.google.com"];
    	
    	NetworkStatus internetStatus = [[Reachability sharedReachability] remoteHostStatus];
    	
    	if ((internetStatus != ReachableViaWiFiNetwork) && (internetStatus != ReachableViaCarrierDataNetwork))
    	{
    		UIAlertView *myAlert = [[UIAlertView alloc] initWithTitle:@"No Internet Connection" message:@"You require an internet connection via WiFi or cellular network for location finding to work." delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
    		[myAlert show];
    		[myAlert release];
    	}
    	
    	
    	
    	
    	if ( (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]))
    		
    	{	
    	
    	[button removeFromSuperview];
    	}	
    	
    }
    
    
    
    
    - (IBAction)grabImage {
    
    		self.imgPicker = [[UIImagePickerController alloc] init];
    	self.imgPicker.delegate = self;	
    	self.imgPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    	[self presentModalViewController:self.imgPicker animated:YES];
    		
    }
    
    		-(IBAction)grabImageCam {
    			
    			
    				
    	self.imgPickerCam = [[UIImagePickerController alloc] init];
    	self.imgPickerCam.delegate = self;
    	self.imgPickerCam.sourceType = UIImagePickerControllerSourceTypeCamera;
    	[self presentModalViewController:self.imgPickerCam animated:YES];
    				
    }
    
    		
    
    
      - (IBAction)uploadImage {
    	  [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];
    
    	/*
    	 turning the image into a NSData object
    	 getting the image back out of the UIImageView
    	 */
    	  
    	  
    	NSData *imageData = UIImageJPEGRepresentation(image.image, 100);
    	  
    
    	// setting up the URL to post to
    	NSString *urlString = @"http://mozymac.com/upload.php";
    	
    	// setting up the request object now
    	
    	NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
    	[request setURL:[NSURL URLWithString:urlString]];
    	[request setHTTPMethod:@"POST"];
    
    	/*
    	 add some header info now
    	 we always need a boundary when we post a file
    	 also we need to set the content type
    	 
    	 You might want to generate a random boundary.. this is just the same 
    	 as my output from wireshark on a valid html post
    	 */
    	NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
    	NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
    	[request addValue:contentType forHTTPHeaderField: @"Content-Type"];
    	
    	/*
    	 now lets create the body of the post
    	 */
    	  
    	NSMutableData *body = [NSMutableData data];
    	[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];	
    	[body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"userfile\"; filename=\".jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    	[body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    	[body appendData:[NSData dataWithData:imageData]];
    	[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    	// setting the body of the post to the reqeust
    	[request setHTTPBody:body];
    	
    	// now lets make the connection to the web
    	
    	NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
    	NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
    	  
    	
    	myTextField.text = (returnString);
    	
    	  [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
    
    	
    }
    - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img editingInfo:(NSDictionary *)editInfo {
    	image.image = img;
    	
    			 
    			
    	[[picker parentViewController] dismissModalViewControllerAnimated:YES];
    	// need to show the upload image button now
    	upload.hidden = NO;
    
    }
    
    
    
    @end
    
    
    I'm getting these errors:

    [​IMG]
     
  2. Moderator

    dejo

    Staff Member

    Joined:
    Sep 2, 2004
    Location:
    The Centennial State
    #2
    First off, Reachability has no class method named sharedReachability.
     
  3. thread starter macrumors 65816

    uaecasher

    Joined:
    Jan 29, 2009
    Location:
    Stillwater, OK
    #3
  4. Moderator

    dejo

    Staff Member

    Joined:
    Sep 2, 2004
    Location:
    The Centennial State
    #4
  5. thread starter macrumors 65816

    uaecasher

    Joined:
    Jan 29, 2009
    Location:
    Stillwater, OK
    #5
    sorry about that, thing is it's almost mid-night here and I didn't notice the 2nd page and most developers are open at this time.


    Anyway it works now, but got a question: I'm using google.com as check as it's the most uptime website in the internet but sometimes there is network errors only in specific countries i.e google would not open in x country. Would this problem give the error massage or not.

    Thanks
     

Share This Page