ios - CKQueryOperation and UICollectionView -


i endeavouring make 1 of apps more efficient user. fetch record of booklets, i.e. name, image of cover , booklet itself, name , image being utilised in collection view , booklet (pdf) being utilised in detailsviewcontroller. code -

   func fetchdocuments() {          let container = ckcontainer.default()         let publicdatabase = container.publicclouddatabase         let predicate = nspredicate(format: "truepredicate")         let query = ckquery(recordtype: "booklets", predicate: predicate)         query.sortdescriptors = [nssortdescriptor(key: "creationdate", ascending: true)]         publicdatabase.perform(query, inzonewith: nil) { (results, error) -> void in             if (error != nil) {                 dispatchqueue.main.async() {                     self.notifyuser("cloud access error", message: error!.localizeddescription)                 }             } else {                 print("success")                 result in results! {                     self.bookletarray.append(result)                     print(result)                 }                 operationqueue.main.addoperation({ () -> void in                    self.collectionview.reloaddata()                 })             }         }     }

as works well, download of booklet files (pdf's) causes delay. have endeavoured use code have utilised in other scenes use uitableviews , works them. when endeavour use code collection view, no data (name or image) presented , no apparent errors. selected documents code -

func fetchselecteddocuments() {     let container = ckcontainer.default()     let publicdatabase = container.publicclouddatabase     let predicate = nspredicate(format: "truepredicate")     let query = ckquery(recordtype: "booklets", predicate: predicate)     let queryoperation = ckqueryoperation(query: query)     queryoperation.desiredkeys  = ["booklettitle", "bookletimage"]     queryoperation.recordfetchedblock = { (record:ckrecord) -> void in         let result = record         self.bookletarray.append(result)         print(result)     }     queryoperation.querycompletionblock = { (cursor:ckquerycursor?, error: error?) -> void in         if (error != nil) {             self.notifyuser("cloud access error", message: error!.localizeddescription)              operationqueue.main.addoperation({ () -> void in                 self.collectionview.reloaddata()             })         }     }     publicdatabase.add(queryoperation) }

i'm unsure why works uitableview , not uicollectionview , advice or hints appreciated.


Comments

Post a Comment

Popular posts from this blog

commonjs - How to write a typescript definition file for a node module that exports a function? -

consider, toml node module can use: // toml.d.ts declare module toml { export function parse(value:string):any; } declare module "toml" { export = toml; } then: /// <reference path="../../../../../defs/toml/toml.d.ts"/> import toml = require('toml'); toml.parse(...); however, node module export single function, such 'glob' ( https://github.com/isaacs/node-glob ). the node usage of module be: var glob = require("glob") glob("*.js", {}, callback(err, files) { ... }); you'd naively expect this: // glob.d.ts declare function globs(paths:string, options:any, callback:{(err:any, files:string[]):void; ...but because typescripts 'import' semantics bit strange, seems can use 'import .. = require()' statement alias modules . trying call: /// <reference path="../../../../../defs/glob/glob.d.ts"/> import blog = require('glob'); results in: error ts2072: mod...
Read more

openid - Okta: Failed to get authorization code through API call -

i'm integrating okta own idp server using okta's api. i'm implementing authorization code flow following steps below: in own server, use /api/v1/authn endpoint sessiontoken. use sessiontoken obtain authorization calling endpoint: /oauth2/v1/authorize?client_id=" + clientid + "&sessiontoken=" + sessiontoken + "&response_type=code&response_mode=query&scope=openid&redirect_uri=" + redirecturl + "&state=evanyang&nonce=" it's supposed return response status code 302 , location header containing redirect url code value. however, keep getting response status code 200 , without location header, html body saying "you using unsupported browser." , "javascript disabled on browser." according api documentation: http://developer.okta.com/docs/api/resources/oidc.html#authentication-request , sessiontoken parameter sufficient this: an okta one-time sessiontoken. allows api-based ...
Read more

ios - Change Storyboard View using Seague -

i have following code checks connection server, , depending on want change views if no connection found. nsstring *connect = [nsstring stringwithcontentsofurl:[nsurl urlwithstring:@"http://myserver.com"] encoding:nsutf8stringencoding error:nil]; if (connect == null) { [self performseguewithidentifier:@"network_failure" sender:self]; } else { // other code here } my problem not change views. have added storyboard segue between 2 views identifier of network_failure . not have navigation controller or that, problem? thanks help! no not problem. first of all, in objectivec exists nil object oriented null . must use that. so: if(connect == nil) or better: if(!connect) so due fact nil not same of null , probably code does't enter in if scope . you have been able discover breakpoint. anyway: be sure set trigger segue (line) 2 view controller , , name network_failure (that not best name. should instead view1toview2 ) as, m...
Read more