I am trying to export a screen shot from my application to Facebook using the iOS6 Facebook function. How can I bring out the options inside the application when the button is pressed?
Below is my current code. I want to take the screenshot and at the same time export to Facebook using iOS6 Facebook function.
- (IBAction)export1:(id)sender{
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
[self.tableView scrollToRowAtIndexPath:indexPath
atScrollPosition:UITableViewScrollPositionTop
animated:YES];
exporting.hidden=YES;
CGSize imageSize = [[UIScreen mainScreen] bounds].size;
if (NULL != UIGraphicsBeginImageContextWithOptions)
UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);
else
UIGraphicsBeginImageContext(imageSize);
CGContextRef context = UIGraphicsGetCurrentContext();
// Iterate over every window from back to front
for (UIWindow *window in [[UIApplication sharedApplication] windows])
{
if (![window respondsToSelector:#selector(screen)] || [window screen] == [UIScreen mainScreen])
{
// -renderInContext: renders in the coordinate space of the layer,
// so we must first apply the layer's geometry to the graphics context
CGContextSaveGState(context);
// Center the context around the window's anchor point
CGContextTranslateCTM(context, [window center].x, [window center].y);
// Apply the window's transform about the anchor point
CGContextConcatCTM(context, [window transform]);
// Offset by the portion of the bounds left of and above the anchor point
CGContextTranslateCTM(context,
-[window bounds].size.width * [[window layer] anchorPoint].x,
-[window bounds].size.height * [[window layer] anchorPoint].y);
// Render the layer hierarchy to the current context
[[window layer] renderInContext:context];
// Restore the context
CGContextRestoreGState(context);
}
}
// Retrieve the screenshot image
CGRect contentRectToCrop = CGRectMake(0, 70, 740, 740);
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
CGImageRef imageRef = CGImageCreateWithImageInRect([image CGImage], contentRectToCrop);
UIImage *croppedImage = [UIImage imageWithCGImage:imageRef];
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(croppedImage, nil, nil, nil);
Here is how to post images to Facebook easily using the built in Facebook SDK in iOS6. Happy if this helps you in any ways. Happy coding :)
The Apple Developer Site Gives a new Social.framework for integrating the Social Experiences like Twitter and Facebook.
Refer here.
#Clarence i think you should check out latest Facebook SDK for iOS
it also has some tutorials on how to post images on facebook in iOS 6.
Just download the SDK and you will find sample codes in your Documents folder which include a sample HelloFacebookSample which shows how to post image on facebook in iOS 6.
you just need to pass your image object in this method -
[FBNativeDialogs presentShareDialogModallyFrom:self initialText:nil image:croppedImage url:nil handler:nil];
before using above method you need to properly follow v 3.1 installation instructions here
Related
I am using a method to take a UIImage screenshot programatically which works very nicely. What I want to do now is remove the top most UIView from being included in the screenshot BUT not remove it from the actual view on screen so simply setting topView.hidden = YES won't do. I am using this method to save the screenshot:
- (UIImage*)screenshot
{
CGSize imageSize = [[UIScreen mainScreen] bounds].size;
if (NULL != UIGraphicsBeginImageContextWithOptions)
UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);
else
UIGraphicsBeginImageContext(imageSize);
CGContextRef context = UIGraphicsGetCurrentContext();
// Iterate over every window from back to front
for (UIWindow *window in [[UIApplication sharedApplication] windows])
{
if (![window respondsToSelector:#selector(screen)] || [window screen] == [UIScreen mainScreen])
{
// -renderInContext: renders in the coordinate space of the layer,
// so we must first apply the layer's geometry to the graphics context
CGContextSaveGState(context);
// Center the context around the window's anchor point
CGContextTranslateCTM(context, [window center].x, [window center].y);
// Apply the window's transform about the anchor point
CGContextConcatCTM(context, [window transform]);
// Offset by the portion of the bounds left of and above the anchor point
CGContextTranslateCTM(context,
-[window bounds].size.width * [[window layer] anchorPoint].x,
-[window bounds].size.height * [[window layer] anchorPoint].y);
// Render the layer hierarchy to the current context
[[window layer] renderInContext:context];
// Restore the context
CGContextRestoreGState(context);
}
}
// Retrieve the screenshot image
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
My first thought was to remove the sublayer from the superlayer doing this:
NSArray *sublayers = [[window layer] sublayers];
[[window layer] replaceSublayer:[sublayers objectAtIndex:[sublayers count] - 1] with:nil];
but I found that the sublayers array is only 1 object. How could I remove the top view from the screenshot?
For example you have View1 on your view hierarchy and you don't want to take screenshot of View1 then you can do View1.hiden= TRUE; before screenshot and you can do View1.hiden= FALSE; after screenshot.
May be this will help you.
I'm trying to take a screenshot using this code:
- (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor lightGrayColor];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)viewDidAppear:(BOOL)animated{
UIImageWriteToSavedPhotosAlbum([self screenshot], self, #selector(image: didFinishSavingWithError:contextInfo:), nil);
}
- (UIImage*)screenshot
{
// Create a graphics context with the target size
// On iOS 4 and later, use UIGraphicsBeginImageContextWithOptions to take the scale into consideration
// On iOS prior to 4, fall back to use UIGraphicsBeginImageContext
CGSize imageSize = [[UIScreen mainScreen] bounds].size;
if (NULL != UIGraphicsBeginImageContextWithOptions)
UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);
else
UIGraphicsBeginImageContext(imageSize);
CGContextRef context = UIGraphicsGetCurrentContext();
// Iterate over every window from back to front
for (UIWindow *window in [[UIApplication sharedApplication] windows])
{
if (![window respondsToSelector:#selector(screen)] || [window screen] == [UIScreen mainScreen])
{
// -renderInContext: renders in the coordinate space of the layer,
// so we must first apply the layer's geometry to the graphics context
CGContextSaveGState(context);
// Center the context around the window's anchor point
CGContextTranslateCTM(context, [window center].x, [window center].y);
// Apply the window's transform about the anchor point
CGContextConcatCTM(context, [window transform]);
// Offset by the portion of the bounds left of and above the anchor point
CGContextTranslateCTM(context,
-[window bounds].size.width * [[window layer] anchorPoint].x,
-[window bounds].size.height * [[window layer] anchorPoint].y);
// Render the layer hierarchy to the current context
[[window layer] renderInContext:context];
// Restore the context
CGContextRestoreGState(context);
}
}
// Retrieve the screenshot image
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
But the saved image has the status bar whited out, including the signal, time, and battery. How could I take the screenshot including the content of status bar?
Hide the status bar before taking screenshot as follows:
([[UIApplication sharedApplication] setStatusBarHidden:YES];)
(Tested with iOS 7 and autolayout)
I use the simulator 'take screenshot' feature combined with some conditional code compilation. By uncommenting a #define I can quickly switch to 'take screenshot' mode for my launch screen
The main trick is to hide the status bar when the view controller of your opening screen appears, but with a very long animation, so you have plenty of time to hit the screenshot command in the simulator, which places a screenshot right on your desktop (or take a screenshot on the device if you prefer that).
Using the code below, the status bar disappears immediately thanks to the 'UIStatusBarAnimationNone', but the 'sliding off screen' is animated over a very long period (5000.0 seconds in the code below). So before the bar starts 'moving' 1 point out of the 20 points in vertical size, you have roughly 5000/20 = 250 seconds to take your screenshot (and some coffee).
- (BOOL)prefersStatusBarHidden
{
return YES;
}
- (UIStatusBarAnimation)preferredStatusBarUpdateAnimation
{
#ifdef kTAKE_LAUNCHIMAGE_SCREENSHOT
return UIStatusBarAnimationNone;
#else
return UIStatusBarAnimationSlide;
#endif
}
- (void)removeStatusBarAnimated
{
#ifdef kTAKE_LAUNCHIMAGE_SCREENSHOT
[UIView animateWithDuration:5000.0 animations:^{
[self setNeedsStatusBarAppearanceUpdate];
}];
#else
[UIView animateWithDuration:2.0 animations:^{
[self setNeedsStatusBarAppearanceUpdate];
}];
#endif
}
for more information on taking control of the status bar in iOS 7, check my answer and code here :
https://stackoverflow.com/a/20594717/1869369
This is a solution without hiding the status bar, simply use the correct bounds and note that the y offset should be negative, here "map" is the a view that fills the screen below the status bar:
(Code is written inside a ViewController)
UIGraphicsBeginImageContextWithOptions(self.map.bounds.size, NO, [UIScreen mainScreen].scale);
CGRect bounds = CGRectMake(0, -1*(self.view.bounds.size.height-self.map.bounds.size.height), self.map.bounds.size.width, self.map.bounds.size.height);
BOOL success = [ self.view drawViewHierarchyInRect:bounds afterScreenUpdates:YES];
UIImage* image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
I want to send a form details(name , age etc ..) and the signature of the person as a Image from Ipad to an java web application server.
[http://192.168.1.100:8080/Intranet/checkforimage.htm?name=meena&image=**][1]
I want to know how should I send the image from ipad to the server via http.
Since the server side coding is in java. I am comfortable to receive as bytearray and use.
But the problem is how to convert the image in Ipad to bytearray and to send via HTTP?
Kindly help!
You can do the following:
1) Capture the screen shot of your form after filling all the details and save it as an UIImage object. You can capture the screen shot using below function:
- (UIImage*)screenshot
{
CGSize imageSize = [[UIScreen mainScreen] bounds].size;
if (NULL != UIGraphicsBeginImageContextWithOptions)
UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);
else
UIGraphicsBeginImageContext(imageSize);
CGContextRef context = UIGraphicsGetCurrentContext();
for (UIWindow *window in [[UIApplication sharedApplication] windows])
{
if (![window respondsToSelector:#selector(screen)] || [window screen] == [UIScreen mainScreen])
{
CGContextSaveGState(context);
// Center the context around the window's anchor point
CGContextTranslateCTM(context, [window center].x, [window center].y);
// Apply the window's transform about the anchor point
CGContextConcatCTM(context, [window transform]);
// Offset by the portion of the bounds left of and above the anchor point
CGContextTranslateCTM(context,
-[window bounds].size.width * [[window layer] anchorPoint].x,
-[window bounds].size.height * [[window layer] anchorPoint].y);
// Render the layer hierarchy to the current context
[[window layer] renderInContext:context];
// Restore the context
CGContextRestoreGState(context);
}
}
// Retrieve the screenshot image
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
2) Convert UIImage object to NSData object.3) Send NSData to server using NSURLConnection.
OK try below code:
NSData *imageData = UIImagePNGRepresentation(image);
this will return PNG representation of your UIImage object in the form of NSData.
In case your image is JPEG or JPG than you can use the following:
NSData *imageData = UIImageJPEGRepresentation(image, 1.0);
You can send this "imageData" directly to server using NSURLConnection.
I am implementing iphone application in which I want to implement below features.
When user touch on iphone screen then user snap shot will generate of touch area of the screen and save to photo library.
I have done googling but dont get successed.
Please help me for this query.
Thanks in advance
If you are looking for sample code to control the camera. Here is a bare bones Camera application that takes picture and saves it to library
Check out this method, pass the view touched to this method, will send u the image & save it to library.
- (UIImage*) giveScreentshotsOfView:(UIView*) view
{
if (view == nil)
return nil;
UIGraphicsBeginImageContext(view.bounds.size);
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
+ (UIImage *) captureView:(UIView *)view
{
CGRect screenRect = [[UIScreen mainScreen] bounds];
UIGraphicsBeginImageContext(screenRect.size);
CGContextRef ctx = UIGraphicsGetCurrentContext();
[[UIColor blackColor] set];
CGContextFillRect(ctx, screenRect);
[view.layer renderInContext:ctx];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
//save the image to photo album
UIImageWriteToSavedPhotosAlbum(newImage, nil, nil , nil);
}
Thanks in advance.
I want to add an image view as a overlay view to the camera and save both the (cameraview and image view )as a single image. I searched for it and tried the example given in stackoverflow but it is not displaying any thing than blank screen .If any one know please help me.
- (void)renderView:(UIView*)view inContext:(CGContextRef)context
{
// -renderInContext: renders in the coordinate space of the layer,
// so we must first apply the layer's geometry to the graphics context
CGContextSaveGState(context);
// Center the context around the window's anchor point
CGContextTranslateCTM(context, [view center].x, [view center].y);
// Apply the window's transform about the anchor point
CGContextConcatCTM(context, [view transform]);
// Offset by the portion of the bounds left of and above the anchor point
CGContextTranslateCTM(context,
-[view bounds].size.width * [[view layer] anchorPoint].x,
-[view bounds].size.height * [[view layer] anchorPoint].y);
// Render the layer hierarchy to the current context
[[view layer] renderInContext:context];
// Restore the context
CGContextRestoreGState(context);
}
// this get called when an image has been taken from the camera
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *image = [info valueForKey:UIImagePickerControllerOriginalImage];
//cameraImage = image;
CGSize imageSize = [[UIScreen mainScreen] bounds].size;
if (NULL != UIGraphicsBeginImageContextWithOptions)
UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);
else
UIGraphicsBeginImageContext(imageSize);
CGContextRef context = UIGraphicsGetCurrentContext();
// Draw the image returned by the camera sample buffer into the context.
// Draw it into the same sized rectangle as the view that is displayed on the screen.
float menubarUIOffset = 44.0;
UIGraphicsPushContext(context);
[image drawInRect:CGRectMake(0, 0, imageSize.width, imageSize.height-menubarUIOffset)];
UIGraphicsPopContext();
// Render the camera overlay view into the graphic context that we created above.
[self renderView:self.imagePicker.view inContext:context];
// Retrieve the screenshot image containing both the camera content and the overlay view
UIImage *screenshot = UIGraphicsGetImageFromCurrentImageContext();
UIImageWriteToSavedPhotosAlbum(screenshot, nil, nil, nil);
UIGraphicsEndImageContext();
[self.imagePicker dismissModalViewControllerAnimated:YES];
}
Hope this helps