ios - UIKeyboardFrameBeginUserInfoKey & UIKeyboardFrameEndUserInfoKey -

-

in managing keyboard documentation:

uikeyboardframebeginuserinfokey key nsvalue object containing cgrect identifies start frame of keyboard in screen coordinates. these coordinates not take account rotation factors applied window’s contents result of interface orientation changes. thus, may need convert rectangle window coordinates (using convertrect:fromwindow: method) or view coordinates (using convertrect:fromview: method) before using it.

uikeyboardframeenduserinfokey key nsvalue object containing cgrect identifies end frame of keyboard in screen coordinates. these coordinates not take account rotation factors applied window’s contents result of interface orientation changes. thus, may need convert rectangle window coordinates (using convertrect:fromwindow: method) or view coordinates (using convertrect:fromview: method) before using it.

what meaning of start frame , end frame? difference between them?

the start frame keyboard @ beginning of animation: offscreen if keyboard being shown, or onscreen if keyboard being hidden. end frame keyboard @ end of animation: vice versa. can use difference between them write single method responds both hiding , showing keyboard.

be sure use uikeyboardanimationcurveuserinfokey , uikeyboardanimationdurationuserinfokey when animating view changes: way, animations , os's animations in sync.

another hint: documentation linked states, "the rectangle contained in uikeyboardframebeginuserinfokey , uikeyboardframeenduserinfokey properties of userinfo dictionary should used size information contains. not use origin of rectangle (which {0.0, 0.0}) in rectangle-intersection operations". @ least on ipad on os 3.2, not true. both rects have same size, while origin, in screen coordinates, differs between two.

you may find question helpful: uikeyboardboundsuserinfokey deprecated, use instead?


Comments

Post a Comment

Popular posts from this blog

c++ - How do I get a multi line tooltip in MFC -

-
right now, have tool tip pops when hover on edit box. problem tool tip contains multiple error messages , in 1 long line. need have each error message on own line. error messages contained in cstring new line seperating them. my existing code below. bool ontooltiptext(uint, nmhdr* pnmhdr, lresult* presult) { assert(pnmhdr->code == ttn_needtexta || pnmhdr->code == ttn_needtextw); // need handle both ansi , unicode versions of message tooltiptexta* pttta = (tooltiptexta*)pnmhdr; tooltiptextw* ptttw = (tooltiptextw*)pnmhdr; // tchar szfulltext[256]; cstring strtiptext=_t(""); uint nid = pnmhdr->idfrom; if (pnmhdr->code == ttn_needtexta && (pttta->uflags & ttf_idishwnd) || pnmhdr->code == ttn_needtextw && (ptttw->uflags & ttf_idishwnd)) { // idfrom hwnd of tool nid = ::getdlgctrlid((hwnd)nid); } //m_errprojaccel[ch] contains 1 or more error messages each...
Read more

asp.net - In javascript how to find the height and width -

-
i having .aspx , masterpage page. in masterpage loading aspx page . in aspx page design using generating table structure using code-behind server in javascript how find height , width . regards, kumar if you're looking table height , width, should it var tbl = document.getelementbyid('tbldemo'); alert(tbl.offsetwidth + '\n' + tbl.offsetheight);
Read more

c# - DataTable to EnumerableRowCollection -

-
i have datatable according client requirement can contain invalid date "00/00/1999",null,empty string.(typed datset) when collect them enumerables wish convert of invalid forms empty string. (i.e) enumerablerowcollection<datarow> query = order in _table.asenumerable() select new { orderdate= string.isnullorempty(convert.tostring(order.field<datetime>("orderdate")) || (how check date invalid date) ? string.empty : order.field<datetime>("orderdate") } how check whether date valid date or not? datetime.tryparse...like given current code: datetime date; enumerablerowcollection<datarow> query = order in _table.asenumerable() select new { orderdate= string.isnullorempty(convert.tostring(order.field<datetime>("orderdate")) || !datetime.tryparse(convert.tostring(order.field<datetime...
Read more