ios - Clarifications on managing orientations in UIViewController -

-

i have configuration following:

uinavigationcontroller     -> viewcontroller

where viewcontroller root view controller navigation controller.

viewcontroller can present modally view controller, modalviewcontroller, following.

self.presentviewcontroller(modalviewcontroller, animated: true, completion: nil)

within modalviewcontroller override following method. modal view controller in fact can presented in landscape mode.

override func supportedinterfaceorientations() -> uiinterfaceorientationmask {     return .landscape }

i override viewcontroller's method responding orientation changes.

override func viewwilltransitiontosize(size: cgsize, withtransitioncoordinator coordinator: uiviewcontrollertransitioncoordinator) {     super.viewwilltransitiontosize(size, withtransitioncoordinator: coordinator)             print("size \(size)") }

what noticed if modal view controller presented, print in viewcontroller logged if modalviewcontroller in landscape mode, while no logged in portrait. in other words, while rotate device, modalviewcontroller should able display landscape orientations only. under hood, if viewcontroller not visible (and device in portrait), controller should able respond size changes. not case since cannot see print log.

use case:

if modalviewcontroller not visible print log

size (1024.0, 768.0) size (768.0, 1024.0) size (1024.0, 768.0) size (768.0, 1024.0)

when modalviewcontroller presented modally

size (1024.0, 768.0) size (1024.0, 768.0)

is 1 correct behaviour? goal respond orientation changes viewcontroller if (when modalviewcontroller opened) device in portrait mode. clue?

edit

based on matt comment.

if viewcontroller not frontmost view controller has no business "responding orientation changes". you've merely stumbled across implementation detail or edge case in should have no interest.

viewcontroller complex controller acts parent view controller. has 2 children: portraitviewcontroller , landscapeviewcontroller. these controllers swapped in viewwilltransitiontosize method. whenever modalviewcontroller not visible (not presented) swapping works in correct manner. on contrary, when modalviewcontroller presented, swapping runs landscape mode (see logs above).

it sounds me if you're trying @ wrong time. when modal view controller dismissed , view controller's view reappear, you'll plenty of warning (including appear , layout events) , can whatever needs doing, based on current orientation, before view becomes visible user.


Comments

Post a Comment

Popular posts from this blog

javascript - Slick Slider width recalculation -

-
i'm trying add slide in panel on slick container css. carousel works except new width not being calculated when space has been added. recalibrate once advance next slide i'd happen each time panel opened or closed. i've tried adding both margin , padding, neither makes difference. ideas? https://jsfiddle.net/mhigley/dpf7mlpl/ html: <button type="button" id="button"><i class="fa fa-arrow-right"></i></button> <aside> <h2>slide in panel</h2> <ol> <li>list item</li> <li>list item</li> <li>list item</li> <li>list item</li> <li>list item</li> </ol> </aside> <main role="main"> <div class="sections"> <section> <article> <h2>first slide</h2> <p>lorem ipsum d...
Read more

jsf - PrimeFaces Datatable - What is f:facet actually doing? -

-
looking through primefaces code in app noticed following line: <f:facet name="header">#{trainsearch.traincount} trains</f:facet> it looks overriding header, makes sense, can explain me in little more detail? what happening line of code? complete code listed below: <p:datatable id = "results" value = "#{trainsearch.trains}" var = "train" rendered="#{not empty trainsearch.trains}" styleclass = "train-search-table horizontal-border"> <f:facet name="header">#{trainsearch.traincount} trains</f:facet> <p:column headertext = "train id"> <p:panelgrid columns="1" styleclass = "train-id-grid" layout = "grid"> <h:outputtext styleclass = "train-id-label" value="#{train.traini}"/> <h:outputtex...
Read more

angular2 services - Angular 2 RC 4 Http post not firing -

-
i trying fire post request app , it's not working, tried multiple ways. don't see request being fired under network tab in chrome. not sure problem is, appreciated. import { injectable } '@angular/core'; import { http, headers } '@angular/http'; @injectable() export class userservice{ private _url="users"; constructor(private _http: http){ } checkifusernameexists(username){ return this._http.get(this._url+"/"+username) .map(response => response.json()) } createuser(user){ let headers = new headers(); headers.append('content-type', 'application/json') console.log(json.stringify(user)); return this._http.post(this._url, json.stringify(user),{headers: headers}) .map(response => response.json()) } } first need capture error , solve error: this._http.post(this._url, json.stringify(user),{headers: headers}) .subscribe( ...
Read more