ios - How to animate/morph an menu button like the Facebook Paper app -


i saw animation/morphing in facebook paper app morph menu button, 1 when pull down menu, x , when tap it. recorded because don't know how show other way.

https://www.youtube.com/watch?v=y6j_mvgv-nm

can explain me how done? app.

that awesome, hadn't seen before.

created quick gist that:

https://gist.github.com/mnmaraes/9458421

edit: it's not link, key concepts 2 methods:

-(void)morphtox {     cgfloat angle = m_pi_4;     cgpoint center = cgpointmake(120., 120.);      __weak tuiviewcontroller *weakself = self;     [uiview animatewithduration:0.8 delay:0.0 usingspringwithdamping:0.6 initialspringvelocity:2.0 options:uiviewanimationoptioncurveeaseout animations:^{         tuiviewcontroller *strongself = weakself;          strongself.toplineview.transform = cgaffinetransformmakerotation(-angle*5);         strongself.toplineview.center = center;          strongself.bottomlineview.transform = cgaffinetransformmakerotation(angle*5);         strongself.bottomlineview.center = center;          strongself.centerlineview.transform = cgaffinetransformmakescale(0., 1.0);      } completion:^(bool finished) {      }]; }

and:

-(void)morphtoline {      __weak tuiviewcontroller *weakself = self;     [uiview animatewithduration:0.8 delay:0.0 usingspringwithdamping:0.6 initialspringvelocity:2.0 options:uiviewanimationoptioncurveeaseout animations:^{         tuiviewcontroller *strongself = weakself;          strongself.toplineview.transform = cgaffinetransformidentity;         strongself.toplineview.center = cgpointmake(120., 2.);          strongself.bottomlineview.transform = cgaffinetransformidentity;         strongself.bottomlineview.center = cgpointmake(120., 238.);          strongself.centerlineview.transform = cgaffinetransformidentity;      } completion:^(bool finished) {      }]; }

the first 1 animates parallel lines x , second x lines. playing around numbers , options of animations should give different feels play with.

have fun!


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