iPhone: Making a simple high score system using SQLite -

-

i want make simple highscore system game. no posting online, storing best scores on device, maybe being able share them on twitter or that.

my table this:

create table highscores ( name varchar(10), score int )

and want find easy way retrieve name, score , order score descending, returning top 5.

select name, score highscores order score desc limit 0, 5

i tried this, following sqlite tutorial: http://dblog.com.au/iphone-development-tutorials/iphone-sdk-tutorial-reading-data-from-a-sqlite-database/

i created database, set up, tried make own wrapper, got following problems:

  • it worked loading score, loading name, tried convert nsstring* in tutorial, wouldn't work, returned 0 though had set name "johannes"
  • if navigated away scores page, , menu, , clicked on scores page again app crashed.

any ideas? i'm stressed can't find online this. :[

dude... overkill.

just save data in object or array, save , restore object betweens sessions use nsuserdeafults.

to order data. use predicates. failing sort self. http://developer.apple.com/mac/library/documentation/cocoa/conceptual/predicates/articles/pusing.html

seriously don't waste anytime getting app live. "fail quickly", means figure out doesn't work , run works , make awesome. nothing worse spending days/weeks on app might make few bucks.

hope help.


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