ios - App Crash, "Lost Connection" -


similar this question,

i having issues , app crashing in same way. assume same answer on other question: memory issue; except getting crash during avassetexportsession call.

guard let exporter = avassetexportsession(asset: mixcomposition, presetname: avassetexportpresethighestquality) else { return }         exporter.outputfiletype = avfiletypempeg4         exporter.outputurl = url         exporter.videocomposition = maincomposition         print("done")          exporter.exportasynchronously(completionhandler: {             dispatchqueue.main.async(execute: {                 self.exportdidfinish(exporter)                 print("removing ai")                 self.removeai()                 print("removed ai")                 completion()             })         })  func exportdidfinish(_ exporter:avassetexportsession) {     if(exporter.status == avassetexportsessionstatus.completed) {         print("cool")     }     else if(exporter.status == avassetexportsessionstatus.failed) {         print(exporter.error any)     } }

it prints "done" never prints "removing ai". doesn't print "cool" or "(error)"; crashes , says @ top of xcode "lost connection iphone..." other question states.

i assume memory issue, there nothing happening in between (to knowledge of how works) during asynchronous exporting waiting completion handler called. nothing gets called in between , unsure how handle this. thoughts?

i think avassetexportsession object may deallocated while running async task. consider put class variable make sure async block can finish it's task. like:

class myclass {     var exporter: avassetexportsession?      func export() {         exporter = avassetexportsession(asset: mixcomposition, presetname: avassetexportpresethighestquality)         guard exporter != nil else { return }         exporter.outputfiletype = avfiletypempeg4         exporter.outputurl = url         exporter.videocomposition = maincomposition         print("done")          exporter?.exportasynchronously(completionhandler: {              dispatchqueue.main.async {                self.exportdidfinish(exporter)                print("removing ai")                self.removeai()                print("removed ai")                completion()            }         }     } }

i'm not sure why put on main thread in completion block, maybe want ui later, leave there.

but import - make avassetexportsession not stored on method may dealloc it. it's memory issue cause this.


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