ios - UICollectionView dynamic custom layout -


i'm trying create uicollectionview type of layout image i've attached. , i'm little confused how achieve layout.

after doing googling seems need write custom uicollectionviewflowlayout, can't seem find examples of layouts have different section counts per item.

if @ mockup first item has 1 section. image landscape, middle item has 2 sections 2 portrait images.

am looking wrong thing? point me in right direction?

layout mockup

you can using uicollectionviewdelegateflowlayout, no need subclass.

here example:

import uikit  class viewcontroller: uiviewcontroller, uicollectionviewdatasource, uicollectionviewdelegate, uicollectionviewdelegateflowlayout {      @iboutlet weak var collectionview: uicollectionview!      override func viewdidload() {         super.viewdidload()         collectionview.delegate = self         collectionview.datasource = self     }      // mark: - uicollectionviewdatasource      func numberofsectionsincollectionview(collectionview: uicollectionview) -> int {         return 1     }      func collectionview(collectionview: uicollectionview, numberofitemsinsection section: int) -> int {         return 10     }      func collectionview(collectionview: uicollectionview, cellforitematindexpath indexpath: nsindexpath) -> uicollectionviewcell {         let cell = collectionview.dequeuereusablecellwithreuseidentifier("testcollectionviewcell", forindexpath: indexpath) as! uicollectionviewcell         if indexpath.item % 3 == 0 {             cell.backgroundcolor = uicolor.redcolor()         } else {             cell.backgroundcolor = uicolor.greencolor()         }         return cell     }      // mark: - uicollectionviewdelegateflowlayout      func collectionview(collectionview: uicollectionview, layout collectionviewlayout: uicollectionviewlayout, sizeforitematindexpath indexpath: nsindexpath) -> cgsize {         let flowlayout = collectionviewlayout as! uicollectionviewflowlayout         if indexpath.item % 3 == 0 {             let cellwidth = (cgrectgetwidth(collectionview.frame) - (flowlayout.sectioninset.left + flowlayout.sectioninset.right))             return cgsize(width: cellwidth, height: cellwidth / 2)         } else {             let cellwidth = (cgrectgetwidth(collectionview.frame) - (flowlayout.sectioninset.left + flowlayout.sectioninset.right) - flowlayout.minimuminteritemspacing) / 2             return cgsize(width: cellwidth, height: cellwidth)         }     }  }

Comments

Post a Comment

Popular posts from this blog

java - Spring Data JPA: Why findOne(id) executing delete query internally? -

i have 1 application using @manytomany annotation link 2 different entities 1 parent entity. not sure if have implemented properly. when execute .findone() on parent entity's repository find it, @ first fetch data along executing delete queries internally delete record mapping table (a table jpa creates after adding @manytomany annotation.). following generated sql queries , code snippet: java class @entity @table(name = "inventory") public class inventory { @id long id; // many other properties @manytomany(fetch=fetchtype.lazy) private list<stream> streams; @manytomany(fetch=fetchtype.lazy) private list<subject> subjects; } there no other annotation i've put in stream , subject entity class link inventory class. when run app, create following tables: inventory stream subject inventory_stream inventory_subject (inventory_stream , inventory_subject, 2 tables created automatically, don't k...
Read more

python - Mongodb How to add addtional information when aggregating? -

i beginner , wrote line pipeline works, wanna add other information output, screen name , or number of tweets.i tried add under $group gave me syntax error everytime here pipeline: def make_pipeline(): # complete aggregation pipeline pipeline = [ { '$match': { "user.statuses_count": {"$gt":99 }, "user.time_zone": "brasilia" } }, { "$group": { "_id": "$user.id", "followers": { "$max": "$user.followers_count" } } }, { "$sort": { "followers": -1 } }, { "$limit" : 1 } ]; i using on example : { "_id" : objectid("5304e2e3cc9e684aa98bef97"), "text" : "first week of school on :p", "in_reply_to_status_id" : null, "retweet_count" : null, ...
Read more

java - Incorrect order of records in M-M relationship in hibernate -

Image
i have 4 records in bridge table in mysql database. using @manytomany in hibernate, accurate order of employees incorrect incorrect of projects. following required material figure out doing mistake. this source. @entity @table(name="project") public class projectbean { @id @generatedvalue @column(name="project_id") private int projectid; @column(name="title") private string projecttitle; @manytomany(mappedby="projects") private collection<employeebean> employees; public projectbean() { employees = new arraylist<employeebean>(); } //getters & setters } @entity @table(name="employee") public class employeebean { @id @generatedvalue @column(name="employee_id") private int employee_id; @column(name="first_name") private string ...
Read more