ios - Why PNG image got double size after taking screenshot of UIView? -


i able take screenshot uiview @ iphone 6 below code: -

here have printed 2 logs. first gives me image size {375, 667} after converting png format gives me image size {750, 1334}.

i know it's converting retina display. each point represented 2 pixels on screen saved image double resolution.

but need image size {375, 667} png format. 

- (uiimage *)imagewithview:(uiview *)view {     uigraphicsbeginimagecontextwithoptions(view.bounds.size, no, [uiscreen mainscreen].scale);     [view drawviewhierarchyinrect:view.bounds afterscreenupdates:yes];     uiimage *image = uigraphicsgetimagefromcurrentimagecontext();     uigraphicsendimagecontext();      nslog(@"image size: %@", image);  // image size: <uiimage: 0x1700880c0>, {375, 667}      nsdata* imagedata =  uiimagepngrepresentation(image);     uiimage* pngimage = [uiimage imagewithdata:imagedata];     uiimagewritetosavedphotosalbum(pngimage, nil, nil, nil);      nslog(@"png image size: %@", pngimage);  // png image size: <uiimage: 0x174087760>, {750, 1334}      return image; }


big image:- enter image description here

small image:-

enter image description here

just not bad quality can create image screen scale

but when load can use this

cgfloat screenscale = [uiscreen mainscreen].scale; if (screenscale != img.scale) {     img = [uiimage imagewithcgimage:img.cgimage scale:screenscale    orientation:img.imageorientation]; }

Comments

Post a Comment

Popular posts from this blog

ubuntu - PHP script to find files of certain extensions in a directory, returns populated array when run in browser, but empty array when run from terminal -

i running os ububtu 16.04. ultimate goal able run php script cron job every minute. here php script located @ /var/www/html/tests/test/index.php : <?php $directorypath = $_server['document_root']."/tests/test/data/"; echo "directorypath: $directorypath<br><br>";//check $imagefilepathsarray = glob($directorypath . "*.{png,gif}", glob_brace); echo "<br><br>imagefilepathsarray: "; print_r($imagefilepathsarray);//check ?> when open php script in browser visiting url my-ip-address/tests/test/index.php , get: directorypath: /var/www/html/tests/test/data/ imagefilepathsarray:array( [0] => /var/www/html/tests/test/data/pic.png [1] => /var/www/html/tests/test/data/pic.gif ) before writing cron job in crontab file, need check if can run anywhere using terminal . opened ubuntu terminal @ /home/ location, , executed in terminal: sudo php /var/www/html/tests/test/index.php i got following out...
Read more

php - How can i create a user dashboard -

today have questions you, want create user dashboard site, include (obviously), users data, example -email -username -and others stuff how can information, , print them in html page? if can, how can these information via php sessions? shuld use session? example, if user login, , start new session ( session_start() ), how can data print in dashboard? should use php "project"? in advice, have day , thank time!
Read more

javascript - How to detect toggling of the fullscreen-toolbar in jQuery Mobile? -

i have jquery mobile page fixed full-screen toolbar, data-tap-toggle enabled. straight under toolbar have positioned banner should slide upwards when toolbar hiding , slide downward when toolbar showing. jquery mobile toggles toolbar applying , removing ui-fixed-hidden class - sadly, can't find in documentation of toolbar widget toggle , hide or show event that. how can detect when toolbar toggled, reposition banner? .banner { position: fixed; background-color: darkseagreen; top: 46px; min-height: 48px; width: 100%; text-align: center; line-height: 48px; } <!doctype html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"> <link rel="stylesheet" href="https://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.css"> <script src="https://code.jquery.com/jquery-1....
Read more