Thursday, 23 January 2014

Hi all,

Can anyone please let me know how to delete an image ( a Blob element ) from the sqlite database in iOS?

Thanks in Advance
Tejaswini.S


Monday, 6 January 2014

How to avoid user authentication in Dropbox API?

Here is the solution.....

Use HTTP API instead of Native API to generate the access Tokens (Which we can use for authorization)

Follow the below link to Generate OAuth_Tokens

http://oauth.net/core/1.0/#auth_step1

The following are the steps to generate Access tokens


RequestToken : oauth_consumer_key =xxxxxxxxxx(APP Key)&oauth_signature(APP SECRET KEY)=xxxxxxxxxxx
timeStamp = current time in seconds
Nonce =  Any random string


https://api.dropbox.com/1/oauth/request_token?oauth_consumer_key= xxxxxxxxxx&oauth_signature_method=PLAINTEXT&oauth_signature= xxxxxxxxxx%26&oauth_timestamp=1388707200&oauth_nonce=jdiwdj39rndkk&oauth_version=1.0



You will get oauth_token & Oauth_Secret now

Now signIn to dropbox account to Authorize the request token

Authorize: https://www.dropbox.com/1/oauth/authorize?oauth_token=xxxxxxxxx

Now you will get the Access token

AccessToken :


https://www.dropbox.com/1/oauth/access_token?oauth_consumer_key=xxxxxxxx&oauth_token= xxxxxxxx&oauth_signature_method=PLAINTEXT&oauth_signature= xxxxxxxx%26 xxxxxxxx&oauth_timestamp=1388707400&oauth_nonce=dji430srgsmx33448&oauth_version=1.0



reply
oauth_token_secret = xxxxxxxx & oauth_token = xxxxxxxx & uid=124926213
Now you have access tokens to access your dropbox with out using user authentications



Sunday, 15 December 2013

How to limit Zooming in of an image upto a particular frame?

Hi all,

Can anybody let me know how to limit the zoom out functionality upto a particular frame?
Beyond that frame , the image should not be zoomed out.


Thanks in advance
Tejaswini.S

Thursday, 12 December 2013

Applying touch events to UIScrollview

How can I detect touch points in my UIScrollView ? The touches delegate methods are not working.


Ans:

For this we need to set up a tap gesture.

UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(singleTapGestureCaptured:)];

[scrollView addGestureRecognizer:singleTap];   
 

and you will get the touches in:

- (void)singleTapGestureCaptured:(UITapGestureRecognizer *)gesture
  {

    CGPoint touchPoint=[gesture locationInView:scrollView];
  }

Tuesday, 10 December 2013

How to resolve the iOS: Warning: Attempt to present on while a presentation is in progress

I am trying to create a modal view controller after picking an image from the image picker. I use the code :


- (void)imagePickerController:(UIImagePickerController *)picker1 didFinishPickingMediaWithInfo:(NSDictionary *)info 

{
  UIImage *img = [info objectForKey:@"UIImagePickerControllerOriginalImage"];

 [myPicker dismissViewControllerAnimated:YES ];

 myImagePicker = [[ImagePickerViewController alloc] initWithNibName:@"ImagePickerViewController" bundle:nil];
   
myImagePicker.modalTransitionStyle  = 
         UIModalTransitionStyleCrossDissolve;
[self presentViewController:myImagePicker animated:YES completion:nil];
    
}

I receive the warning:
Warning:  Attempt to Present <Modal View Controller: 0x7561600> on <ViewController: 0x75a72e0 > while a presentation is in progress!


and the modal view does not appear.





Here the issue is happening because, we are first dismissing the UIImagePicker and immediately we are displaying another view as modal view. That's why we are getting this error.
So, the solution is the method with the completion handler.
- (void)imagePickerController:(UIImagePickerController *)picker1 didFinishPickingMediaWithInfo:(NSDictionary *)info {
    
    UIImage *img = [info objectForKey:@"UIImagePickerControllerOriginalImage"];

    [self dismissViewControllerAnimated:YES completion:^{
        
   myImagePicker = [[ImagePickerViewController alloc] initWithNibName:@"ImagePickerViewController" bundle:nil];
        
   myImagePicker.modalTransitionStyle  = UIModalTransitionStyleCrossDissolve;
        [self presentViewController:myImagePicker animated:YES completion:nil];

    }];
   
}





Wednesday, 4 December 2013

How can we get the comments of video on googlePlus in ios ?

Hi ,


In my application i shared the video on googlePlus using Google+ API  and i need to get the comments of that video.
Is it possible to get the comments of video from googlePlus.
I gone through the GooglePlus API documentation and i found one link (https://www.googleapis.com/plus/v1/activities/activityId/comments
to get the comments.
but in that link we need t place the activityId.
When we share the video on googlePlus then one activityId is generated for that video but iam unable to get that activityId.