iphone - Animate resizing UIView header of UITableView -


basically, want replicate behavior in login screen in facebook iphone: when input field touched, logo/header view decreases in height make room keyboard.

here have uitableview (with static content):

my login scene

the "control" uiview have contains logo in uiimageview, , "table view section" contains uitextfields username/password.

my question is, how can animate having uiview ("control") decreasing height, while having uitableviewcells in "table view section" naturally slide up? have tried following:

 [uiview animatewithduration:1.0f animations:^{     cgrect theframe = _headerview.frame;     theframe.size.height -= 50.f;     _headerview.frame = theframe; }];

where _headerview uiview header. resized, uitableview not react if uitableviewcell resized (i.e. login uitableviewcells don't shift up). how can fix this?

i have seen examples of how resize uitableviewcell, can't put header/logo in uitableviewcell table view section grouped , shouldn't login section.

edit

great answer! here's how ended animating it, view_is_up instance variable:

-(void)movetableview:(bool)up{     float move_distance = 55.f;     [uiview beginanimations:nil context:nil];     [uiview setanimationduration:.3f];     [uiview setanimationcurve:uiviewanimationcurveeaseout];     uiedgeinsets insets = self.tableview.contentinset;     if(view_is_up&&!up){         insets.top += move_distance;         view_is_up = no;     }     else if(!view_is_up&&up){         insets.top -= move_distance;         view_is_up = yes;     }     self.tableview.contentinset = insets;     [uiview commitanimations]; }

it works beautifully, , configurable via uiview animations.

if add following code in animations' block, should fix it:

uiedgeinsets insets = self.tableview.contentinset; insets.top -= 50.f; self.tableview.contentinset = insets;

where self.tableview outlet uitableview


Comments

Post a Comment

Popular posts from this blog

linux - xterm copying to CLIPBOARD using copy-selection causes automatic updating of CLIPBOARD upon mouse selection -

i've tried various ways coerce xterm (versions 285 , 292) copy selection clipboard clipboard whenever press ctrl-shift-c. promising way far has been, in ~/.xresources, put this: xterm*vt100.translations: #override \ ctrl shift <keypress> c: copy-selection(clipboard) \n\ ctrl shift <keypress> v: insert-selection(clipboard) ctrl-shift-v works perfectly, copying has nuance... if restart xterm, highlighting text puts things in primary clipboard; expected, proper, default behavior. if hit ctrl-shift-c, copies current selection clipboard clipboard. the bug, however, if highlight text after first time pressed ctrl-shift-c, you'll see highlighting copies both primary and clipboard. cannot figure out how stop xterm updating clipboard upon selection... , doesn't make sense me in first place. i said, @ specific point in time, copy selection clipboard... yet starts updating automatically upon selection after doing once... anyone have workaround...
Read more

c++ - qgraphicsview horizontal scrolling always has a vertical delta -

Image
i've subclassed qgraphicsview custom canvas used in cad application. i've reimplemented qgraphicsview::wheelevent check keyboard modifiers control key and, if control key pressed, zoom. i'm trying implement horizontal scroll when user holds shift , uses wheel. the problem i'm having horizontal scrolling always scrolls 0.279. not huge problem, hugely annoying , points else being wrong. so, here questions: is right way implement horizontal scrolling? if not, is? how eliminate delta of 0.279? thanks in advance. code , sample output below void myview::zoom(int delta) { double factor = pow(1.2, delta/abs(delta)); this->scale(factor, factor); } void myview::scrollhorizontal(int level) { qpointf center = maptoscene(viewport()->rect().center()); qdebug() << "center: " << center.x() << ", " << center.y(); centeron(qpointf(center.x() - level, center.y())); } void myview::wheelevent(qwheeleve...
Read more