filesystems - how can i back again to main thread after finish saving images and videos in swift? -


please have save image , videos in document directory saving on background thread images , videos problem how can know saving finish image , videos or image , video ? because don't know how can detect the operation finish?

the following code :

  dispatchqueue.global(qos: .background).async {              (_,asset) in self.dictionaryofassets.enumerated() {                 if asset.value.mediatype == .image {                      let getnumberofphotosinthumbfolder = dealwithfilesystem.fetchnumberoffilesinfolder(foldername: foldername)                     let imagethumbpath = dealwithfilesystem.fetchfoldername(foldername: foldername)?.appendingpathcomponent("image \(getnumberofphotosinthumbfolder!).png")                     let fetchoption = phimagerequestoptions()                     fetchoption.issynchronous = true                     fetchoption.deliverymode = .highqualityformat                     fetchoption.resizemode = .exact                     phimagemanager.default().requestimage(for: asset.value, targetsize: cgsize(width:100,height:100), contentmode: .aspectfill, options: fetchoption, resulthandler: { (img, info) in                           if let convertimage = uiimagepngrepresentation(img!) {                              try! convertimage.write(to: imagethumbpath!)                          }                      })                      // save image full size                      let imagefullpath = dealwithfilesystem.fetchfoldername(foldername: foldername + ".xcvg")?.appendingpathcomponent("image \(getnumberofphotosinthumbfolder!).png")                     phimagemanager.default().requestimagedata(for: asset.value, options: fetchoption, resulthandler: { (data, _, _, nil) in                          try! data?.write(to: imagefullpath!)                     })                       // end image saving                 }else if asset.value.mediatype == .video {                      let getnumberofphotosinthumbfolder = dealwithfilesystem.fetchnumberoffilesinfolder(foldername: foldername)                     let imagethumbpath = dealwithfilesystem.fetchfoldername(foldername: foldername)?.appendingpathcomponent("video \(getnumberofphotosinthumbfolder!).jpg")                     let fetchoption = phimagerequestoptions()                     fetchoption.issynchronous = true                     fetchoption.resizemode = .exact                     fetchoption.deliverymode = .highqualityformat                     phimagemanager.default().requestimage(for: asset.value, targetsize: cgsize(width:100,height:100), contentmode: .aspectfill, options: fetchoption, resulthandler: { (img, info) in                           if let convert = uiimagepngrepresentation(img!) {                              try! convert.write(to: imagethumbpath!)                          }                      })                      let videofilepath = dealwithfilesystem.fetchfoldername(foldername: foldername + ".xcvg")?.appendingpathcomponent("video \(getnumberofphotosinthumbfolder!).mp4")                     phimagemanager.default().requestavasset(forvideo: asset.value, options: nil, resulthandler: { (avasset, avaudio, info) in                          let getasseturl = avasset as! avurlasset                          if let convertvideo = nsdata(contentsof: getasseturl.url) {                              convertvideo.write(to: videofilepath!, atomically: true)                             krprogresshud.show()                         }// end convert image                       })// end save video                   }// end if statment               }// end loop           }// end background thread block

thanks advance


-

Comments

Post a Comment

Popular posts from this blog

python - How to insert QWidgets in the middle of a Layout? -

Image
i'm using qt framework build graphical user interface. use qgridlayout position qwidgets neatly. gui looks this: my application regularly adds new widgets gui @ runtime. these new widgets not added @ end of qlayout, somewhere in middle. the procedure bit cumbersome. applied on figure above, need take out widg_c , widg_d , ... qgridlayout. next, add widg_x and widg_y , , put other widgets again. how remove widgets qgridlayout: for in reversed(range(mygridlayout.count())): self.itemat(i).widget().setparent(none) ### as long you're dealing small amount of widgets, procedure not disaster. in application display lot of small widgets - perhaps 50 or more! application freezes second while procedure ongoing, annoying user. there way insert widgets somewhere in qlayout, without need take out other widgets? edit: apparently solution qvboxlayout simple. use function insertwidget(..) instead of addwidget(..) . docs can found link: http://doc.qt.io/qt-5/qboxlayou
Read more

python - serve multiple gunicorn django instances under nginx ubuntu -

i need serve 2 webs apps (django) on gunicorn under different domain names using nginx on ubuntu. started using tutorial: https://www.digitalocean.com/community/tutorials/how-to-set-up-django-with-postgres-nginx-and-gunicorn-on-ubuntu-16-04 it worked fine 1 using that. tried same thing second gives me 502 gateway second domain. tried following tutorial: http://michal.karzynski.pl/blog/2013/10/29/serving-multiple-django-applications-with-nginx-gunicorn-supervisor/ i'm @ part run gunicorn start script: sudo bin/gunicorn_start i response: starting webuildblack root traceback (most recent call last): file "/home/devin/webuildblack/bin/gunicorn", line 7, in <module> gunicorn.app.wsgiapp import run importerror: no module named 'gunicorn.app'; 'gunicorn' not package you have named program gunicorn.py gunicorn -package. rename file , remove gunicorn.pyc file.
Read more

module - Prestashop displayPaymentReturn hook url -

i new prestashop developer , trying create paymentmodule. have got show payment method can not proceed purchase because not know hot works. does know should redirect run hooddisplaypaymentreturn method? i happy if explain me complete navigation map make purchase. anyway, can find relation between hooks , pages? when have new module payment rely on simplest provided prestashop: bankwire. inside can find 3 hooks. hookpayment: public function hookpayment($params) { if (!$this->active) return; if (!$this->checkcurrency($params['cart'])) return; $this->smarty->assign(array( 'this_path' => $this->_path, 'this_path_bw' => $this->_path, 'this_path_ssl' => tools::getshopdomainssl(true, true).__ps_base_uri__.'modules/'.$this->name.'/' )); return $this->display(__file__, 'payment.tpl'); } hookdisplaypaymenteu: public fun
Read more