ios - Set layer.transform with CATransform3DRotate like UIViewAnimationOptionTransitionFlipFromRight -


i've set view such when app navigates forward, performs transitionfromview using uiviewanimationoptiontransitionflipfromright option. yields effect like:

using uiviewanimationoptiontransitionflipfromright

navigating backwards uses uiviewanimationoptiontransitionflipfromleft, otherwise same. ok, far, good.

now, i've set uipangesturerecognizer can link flipping of views user's horizontal gesture on screen. can't use transitionfromview in case, gesture recognizer manually setting transform property of layer with:

catransform3d transform = catransform3didentity; transform.m34 = 1.0 / -800.0; viewtotransform.layer.transform = catransform3drotate(transform, m_pi * rotationpercent, 0.0, 1.0, 0.0);

but yielding subtly different effect:

catransform3drotate

in uiviewanimationoptiontransitionflipfromright option of transitionfromview view scaled during flipping animation such tallest edge of flipped view stays height of container view. when manually doing transform of layer, it's center of view stays constant size, cropping corners of longer edge of flipped view during animation.

how achieve effect when setting transform property of layer in gesture recognizer (i want adjust opacity, too, slight dimming effect transitionfromview achieves). i'm thinking use catransform3dmakescale , manually calculate scaling function based upon angle of rotation , particular m34 setting, before go through exercise, want make sure i'm not overlooking more intuitive or natural way achieve simultaneous scaling , rotating standard flip animation entails. , if have calculate scaling factor manually, i'd appreciate guidance how define function of m34 setting , angle (i'm no expert in subtleties of vector transformations).

the transforms based around layers anchorpoint. "pivot point" around rotate.

the anchorpoint uses scale 0 1 in both x , y , defaults 0.5, 0.5

i believe want anchor layer set this:

viewtotransform.layer.anchorpoint = cgpointmake(0.5, 1);

there info , research locations in answers question:

changing calayer's anchorpoint moves view


Comments

Post a Comment

Popular posts from this blog

ios - iPhone/iPad different view orientations in different views , and apple approval process -

i force app's home screen portrait , other views landscape. apple rejects app if this? if not , how force first screen launch in portrait mode? , force other screens launch in landscape. this not duplicate question search every possible answer in website. i force app's home screen portrait , other views landscape. apple rejects app if this? no apple not reject app this. have lot of apps doesn't support orientation. forcing on 1 screen won't cause app reject. if not , how force first screen launch in portrait mode? , force other screens launch in landscape. can on write : -(nsuinteger)supportedinterfaceorientations; function.
Read more

java Extracting Zip file -

i'm looking way extract zip file. far have tried java.util.zip , org.apache.commons.compress, both gave corrupted output. basically, input zip file contain 1 single .doc file. java.util.zip: output corrupted. org.apache.commons.compress: output blank file, 2 mb size. so far commercial software winrar work perfectly. there java library make use of this? this method using java.util library: public void extractzipnative(file filezip) { zipinputstream zis; stringbuilder sb; try { zis = new zipinputstream(new fileinputstream(filezip)); zipentry ze = zis.getnextentry(); byte[] buffer = new byte[(int) ze.getsize()]; fileoutputstream fos = new fileoutputstream(this.tempfolderpath+ze.getname()); int len; while ((len=zis.read(buffer))>0) { fos.write(buffer); } fos.flush(); fos.close(); } catch (filenotfoundexception e) { // todo auto-generated catch block ...
Read more

C# WinForm - loading screen -

i ask how make loading screen (just picture or something) appears while program being loaded, , disappears when program has finished loading. in fancier versions, have seen process bar (%) displayed. how can have that, , how calculate % show on it? i know there form_load() event, not see form_loaded() event, or % property / attribute anywhere. all need create 1 form splash screen , show before main start showing landing page , close splash once landing page loaded. class splashform { //delegate cross thread call close private delegate void closedelegate(); //the type of form displayed splash screen. private static splashform splashform; static public void showsplashscreen() { // make sure launched once. if (splashform != null) return; thread thread = new thread(new threadstart(splashform.showform)); thread.isbackground = true; thread.setapartmentstate(apartmentstate.sta); thread....
Read more