I'm using this code to take a screenshot of my specific UIView which is inside in my main view.
UIGraphicsBeginImageContextWithOptions(_myView.frame.size, NO, [UIScreen mainScreen].scale);
[self.view drawViewHierarchyInRect:self.view.bounds afterScreenUpdates:YES];
UIImage *imageSave = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
Main view size is (0,0,320,480) lets say, and myView size is (10,20,200,150)
Now i would like to capture/take a screenshot only of myView.
The above code doesn't capture exactly how i want, any suggestions?
Try this, it works for me.
- (UIImage *)snapshotOfView:(UIView *)view
{
UIGraphicsBeginImageContext(view.bounds.size);
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return viewImage;
}
Related
I have a UIimageview that i have a transparent rect that i can resize by drag the problem is i couldn't save the image (with the recant above)
i tried
-(UIImage *)imageWithViewOld:(UIView *)view
{
UIGraphicsBeginImageContextWithOptions(view.bounds.size, view.opaque, 0.0);
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage * img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return img;
}
but it only show my UIImageview without my custom UIview
i even tried adding
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
[self.myRect.layer renderInContext:UIGraphicsGetCurrentContext()];
but in the generated image i can see the rect but above my image not inside
It sounds like you have an image view and you want to drag the transparent view over the image view and saved a cropped version of the image view. The issue with how it sounds like your code is set up, is that both of these views are siblings. The easiest solution you can do is add the transparent view as a subview to the image view and then use -drawViewHierarchyInRect:afterScreenUpdates:.
-(UIImage *)imageWithViewOld:(UIView *)view croppedTo:(CGRect)rect
{
UIGraphicsBeginImageContextWithOptions(view.bounds.size, view.opaque, 0.0);
[view drawViewHierarchyInRect:rect afterScreenUpdates:NO];
UIImage * img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return img;
}
Is there any way to capture a UIView to UIImage which is not currently visible or it is out of the frame. Below the code I am using now:
UIGraphicsBeginImageContextWithOptions(_myView.bounds.size, _myView.opaque, 0.0f);
[theView drawViewHierarchyInRect:_myView.bounds afterScreenUpdates:NO];
UIImage * snapshotImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
Try this-
-(UIImage *)imageFromView:(UIView *)myView{
UIGraphicsBeginImageContextWithOptions(myView.bounds.size, myView.opaque, [UIScreen mainScreen].scale);
[myView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage * image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
I tried two different ways to create a screenshot, but unfortunately they don't work as I need, I have an RMMapView that is blank on the screenshot. When I create snapshot manually on my device it works perfectly, and the map view is on the screen. So I would like to achieve the same result programmatically. Is it possible somehow as I tried? Or what is the right way to do that? (To reproduce that type of screenshot)
- (UIImage *) takeScreenshot {
//1. version
UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, NO, [UIScreen mainScreen].scale);
[self.view drawViewHierarchyInRect:self.view.bounds afterScreenUpdates:YES];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
//2. version
UIGraphicsBeginImageContext(self.view.bounds.size);
CGContextRef context=UIGraphicsGetCurrentContext();
[self.view.layer renderInContext:context];
UIImage *image=UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
Actually You can use a method called takeSnapshot in a RMMapView.
UIImage *image = self.mapView.takeSnapshot
[Update]
Can you try this method instead
CGSize size = self.view.bounds.size;
CGRect cropRect = self.mapView.bounds
UIGraphicsBeginImageContext(size);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage * mapImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
CGImageRef imageRef = CGImageCreateWithImageInRect(mapImage.CGImage, cropRect);
UIImage * cropImage = [UIImage imageWithCGImage:imageRef];
CGImageRelease(imageRef);
UIImageWriteToSavedPhotosAlbum(cropImage, nil, nil, nil);
UIGraphicsEndImageContext();
Good luck
I can take snapshots of the whole frame of the UIView with no problem.
Taking part of it cause to a squeezed image.
This is my UIView category method:
- (UIImage *)snapshot:(CGRect)frame
{
UIGraphicsBeginImageContextWithOptions(frame.size, YES, [[UIScreen mainScreen] scale]);
[self drawViewHierarchyInRect:frame afterScreenUpdates:YES];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
And this is the call to this method:
UIImage *img = [self.view snapshot:bottomRectToSnap];
When bottomRectToSnap is a partial frame of the view.
Note:The UIView contains UITableView if that matter.
The code you are applying is fine.
Need to add some logic, whatever part you need to take snap, It should be available on screen and hide rest of part while snapping.
Once snap shot done, remove hide code. So it will not effect to view interface too.
Use the following code.
- (void)captureView:(UIView*)view withFrame:(CGRect)frame{
UIGraphicsBeginImageContext(self.view.bounds.size);
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
CGRect rect = frame;
CGImageRef imageRef = CGImageCreateWithImageInRect([viewImage CGImage], rect);
UIImage *img = [UIImage imageWithCGImage:imageRef];
UIImageWriteToSavedPhotosAlbum(img, nil, nil, nil);
CGImageRelease(imageRef);
}
You can add this code to take the snapshot of particular part..
CGRect cropRect=CGRectMake(0, 0, 100, 100);
CGImageRef imageRef = CGImageCreateWithImageInRect([_galleryimageview.image CGImage], cropRect);
UIImage *cropedImage=[UIImage imageWithCGImage:imageRef];
CGImageRelease(imageRef);
This code crop the part of particular image ...Hope this is helpfull for you..
I'm trying to get a UIView screen capture on iOS.
In my view I have two UIImageView with animations.
The code that I using it to capture the view is:
UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, NO, 1.0);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
// Read the UIImage object
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(image, self,
#selector(image:didFinishSavingWithError:contextInfo:), nil);
The result is an image with the background and only one UIImageView. Both ImageViews are in moviming all the time. If I take several pictures, then the UIImageView is in the same position each time.
Try this one:
-(CGImageRef)imageCapture
{
UIGraphicsBeginImageContext(self.view.bounds.size);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
CGRect rect= CGRectMake(0,0 ,width, height);
CGImageRef imageRef = CGImageCreateWithImageInRect([viewImage CGImage], rect);
return imageRef;
}
use the below line whenever you want to capture the screen
UIImage *captureImg=[[UIImage alloc] initWithCGImage:[self imageCapture]];