ios - scrollToItemAtIndexPath before the view is shown the first time -

-

i have uiview added uicollectionview. view shown on app start up. @ same time i'm scrolling position in collection view. therefore use scrolltoitematindexpath. problem scrolls wrong position, because collection view has wrong size @ beginning: if start ipad in landscape orientation on ios 7 collection view takes 768 width despite in landscape.

how can scroll position without user noticing it? in view hierarchy can call it?

viewwillappear: frames have not been set
viewdidappear: not possible without user noticing it
layoutsubviews: called multiple times , need @ startup , when user presses button

i tried use layoutifneeded, doesn't edge case (ios 7, ipad, landscape @ startup).

constraints kick around time viewdidappear , layoutsubviews called last time. time it's late.

you can try inheriting own class uicollectionview , see if layoutsubviews has correct constraints , call scrolltoindex there.

if fails, can cheat setting frame sizes in viewdidload , calling scroll index. ( 1 tad bit more complicated) –


Comments

Post a Comment

Popular posts from this blog

javascript - Karma not able to start PhantomJS on Windows - Error: spawn UNKNOWN -

-
i lost "unknown" error: karma.conf.js: frameworks: ['mocha', 'should'], plugins: ['karma-mocha', 'karma-should', 'karma-phantomjs-launcher'], ... browsers: ['phantomjs'], error: 23 07 2015 14:35:37.691:warn [karma]: no captured browser, open http://localhost:9876/ 23 07 2015 14:35:37.701:info [karma]: karma v0.13.3 server started @ http://localhost:9876/ 23 07 2015 14:35:37.707:info [launcher]: starting browser phantomjs 23 07 2015 14:35:37.738:error [karma]: { [error: spawn unknown] code: 'unknown', errno: 'unknown', syscall: 'spawn' } error: spawn unknown @ exports._errnoexception (util.js:749:11) @ childprocess.spawn (child_process.js:1093:11) @ exports.spawn (child_process.js:933:9) @ object._execcommand (c:\users\jinga4x\git\mdl-sample-project\node_modules\karma\lib\launchers\process.js:63:21) @ object._start (c:\users\jinga4x\git\md
Read more

c# - Display ASPX Popup control in RowDeleteing Event (ASPX Gridview) -

-
i have aspxgridview includes new , delete button. delete button includs gv_rowdeleting event. want show aspxpopupcontrol (id="pupconfirm"). want user have confirm password delete item. tried: protected void gv_rowdeleting(object sender, devexpress.web.data.aspxdatadeletingeventargs e) { pupconfirm.showonpageload = true; } but nothing happened. please me. !!! you can create template column javascript prompt confirmation. <itemtemplate> <asp:linkbutton id="btndelete" runat="server" text="delete" commandname="delete" onclientclick="javascript:if(!confirm('are sure want delete record?')){return false;}"> </asp:linkbutton> </itemtemplate>
Read more

Nuget pack csproj using nuspec -

-
i want create nuget package contains specified in nuspec file, still version csproj. in order use token have pack like: nuget pack myproj.csproj but when adds dependencies , creates unwanted folder in nuget package. nuspec file is: <?xml version="1.0" encoding="utf-8"?> <package xmlns="http://schemas.microsoft.com/packaging/2011/08/nuspec.xsd"> <metadata> <id>test</id> <version>$version$</version> <title>test</title> <authors>test</authors> <owners>test</owners> <requirelicenseacceptance>false</requirelicenseacceptance> <description>test</description> <summary>test</summary> <releasenotes>test</releasenotes> <copyright>test</copyright> </metadata> <files> <file src="bin\debug\*.dll" target="lib\net45" /> <file s
Read more