ios - UITableViewCell layout not updating until cell is reused -


i have uitableview fill autosizing cells. uitableview setup simple:

    tableview.estimatedrowheight = 70     tableview.rowheight = uitableviewautomaticdimension

exactly apple recommends here: https://developer.apple.com/library/content/documentation/userexperience/conceptual/autolayoutpg/workingwithself-sizingtableviewcells.html

to enable self-sizing table view cells, must set table view’s rowheight property uitableviewautomaticdimension. must assign value estimatedrowheight property. both of these properties set, system uses auto layout calculate row’s actual height.

when configuring cell disable/enable constraints achieve needed look. that’s things interesting. cell layout not updated until cell reused. literally. can call layoutifneeded(), setneedslayout(), layoutsubviews() or other method there is, there no way force cell update layout.

all other aspects work pretty good: labels change text, hide/unhide views, layout stuck until cell reused.

question: causes , how avoid behavior?

in case, issue caused estimatedrowheight.

simply removing line

tableview.estimatedrowheight = 70

fixed problems. cell updated layout , fixed issues.

but, likely, you’re going trouble, cell’s height being set 43.5 points. log filled auto layout errors, include line this

<nslayoutconstraint:0x600000097570 'uiview-encapsulated-layout-height' uitableviewcellcontentview:0x7fd4ee511d20.height == 43.5   (active)>

apparently, if won’t provide estimatedrowheight, table view puts 43.5 points height constraint on cell’s content view, , if cell’s “internal” height not match (and probability of 99.99%), it’s going put errors in log.

how avoid error? don’t know yet. post question that, , find answer, provide link in question.


Comments

Post a Comment

Popular posts from this blog

asynchronous - C# WinSCP .NET assembly: How to upload multiple files asynchronously -

i using winscp .net assembly uploading files. want upload multiple files asynchronous way. have created method works single upload. public class uploadingdata { private sessionoptions _sessionoptions; private session _session; //connection etc private void onconnected() { foreach (var fileinfo in localfileslist) { var task = task.factory.startnew(() => uploadfilesasync(fileinfo)); } } private async task uploadfilesasync(string file) { string remotefilepath = _session.translatelocalpathtoremote(file, @"/", "/test_data_upload"); var uploading = _session.putfiles(file, remotefilepath, false); //when done await task.run(() => thread.sleep(1000)); } } please suggest me correct way. thanks you can use backgroundworker class this: string[] images = new string[50]; foreach (var path in images) { backgroundworker
Read more

aws api gateway - SerializationException in posting new Records via Dynamodb Proxy Service in API -

i getting "__type": "com.amazon.coral.service#serializationexception" as reply in postman & in test console in api gateway trying post record directly dynamodb using api proxy services.. referring aws article - https://aws.amazon.com/blogs/compute/using-amazon-api-gateway-as-a-proxy-for-dynamodb/ here's mapping { "tablename": "tablenamegoeshere", "item": { "id" : "$context.requestid" "eventname" : "$input.path('$.eventname')", "timestamp" : $input.path('$.timestamp'), "answers": "$util.parsejson($input.path('$.answers'))" } } update: did asked ... , worked if try add array of json objects gives me above same error - here's trying now. please - couldnt find on google well #set($inputroot = $input.path('$')) { "tablename": "answer", "item": {
Read more

asp.net - Problems sending emails from forum -

i have been redesigning site has message board, has been written guy looked after site. it has few problems , written in .asp , uses .mdb files database. you can see whole thing here . feel free post if helps, test thing have set using original files , new database. the basic problem when posts message, supposed email sent them, have posted it. when replies, originator supposed message, replier has been posted. i’d have thought @ point in process there should script/file in postmessage.asp? the postmessage.asp page below. <% option explicit %> <!-- #include virtual="common/adovbs.inc" --> <html> <head> <meta http-equiv="content-type" content="text/html; charset=windows-1252"> <meta name="generator" content="microsoft frontpage 4.0"> <meta name="progid" content="frontpage.editor.document"> <title>new page 2</title> <base target="_self"
Read more