objective c - Passing NSMutableArray from one View Controller to a function in another -

-

i've read on couple of questions here on passing data between 2 view controllers , seen different ways suggested of doing it. problem follows:

i have view controller (lets call "a") has searchbar in toolbar. nothing else. have view controller ("b") responsible displaying popover view when user presses search button on keyboard when searching in searchbar. works. user enters text, presses search button, popover shown. great.

now have yet display search results in popover tableview , trying pass nsmutablearray function in b argument:

in b.h:

@property (nonatomic, retain) nsmutablearray *searchresults;

in b.m:

    @synthesize searchresults;       -(void)setsearchresults:(nsmutablearray *)resultarray{          [self.searchresults removeallobjects];          [self.searchresults addobjectsfromarray:resultarray];      }

in a.h:

#import "b.h" @property(nonatomic, retain) b *viewcontrollerobjectb;

in a.m:

@synthesize viewcontrollerobjectb;   //the searchresultsarray passed on function -(void)communicatewithb:(nsmutablearray *)searchresultsarray{      //i initialize viewcontrollerobjectb in here      nsmutablearray *temp = [[nsmutablearray alloc] initwitharray:searchresultsarray];     [viewcontrollerobjectb setsearchresults:temp]; }

now works except not content of temp passed on function in b.m. i'ts empty (nil). problem.

i'm new ios appreciated.

edit: forgot mention i'm using arc.

you didn't initialize array (that's why it's nil). in alloc method should:

- (id)init {     self = [super init];       if (self) {           self.searchresults = [nsmutablearray arraywithcapacity:10];      } }

i spotted 2 problems in code:

@synthesize searchresults;       -(void)setsearchresults:(nsmutablearray *)resultarray{          //property logic retain, need release/retain when override setter          if (searchresults != resultarray) {               [searchresults release];               searchresults = [resultarray retain];          }      }   -(void)communicatewithb:(nsmutablearray *)searchresultsarray{      //i initialize viewcontrollerobjectb in here     //mem. leak on temp     nsmutablearray *temp = [[[nsmutablearray alloc] initwitharray:searchresultsarray] autorelease];     [viewcontrollerobjectb setsearchresults:temp]; }

Comments

Post a Comment

Popular posts from this blog

c# - SVN Error : "svnadmin: E205000: Too many arguments" -

-
i trying reposotries using c# code process svncommand = null; var psi = new processstartinfo("svnadmin"); psi.redirectstandardoutput = true; psi.redirectstandarderror = true; psi.useshellexecute = false; psi.arguments= @"dump c:\repositories\myrepo > c:\temp\myrepodumpfile.dump"; using (svncommand = process.start(psi)) { var myoutput = svncommand.standardoutput; var myerror = svncommand.standarderror; debug.write("output :" + environment.newline + environment.newline + myoutput.readtoend() + environment.newline + "error :" + environment.newline + environment.newline + myerror.readtoend()); svncommand.close(); } when use dump command commandline svnadmin dump c:\repositories\myrepo > c:\temp\myrepodumpfile.dump it works fine when try ...
Read more

c++ - Using OpenSSL in a multi-threaded application -

-
i have been writing soap client application in c++ on ubuntu using openssl https transport , pthreads threading. have number of threads - 1 central data acquisition thread periodically gets worker threads make soap requests via shared mutex protected queues. reading documentation openssl found is openssl thread-safe? in openssl faq describes mechanisms required ensure thread safety when using openssl. implemented , works fine. the reason question conceptual difficulty really. thinking implementing same functionality application has already, instead of using threads, create 2 seperate applications : 1 worker thread (of multiple copies running) , main data acquisition thread. use tcp sockets communicate between 2 rather mutex protected queues. may bad idea not important - confusing me would have implement same functions required ensure openssl thread safety in second approach or not? my guess not have , treated independent (indeed surely must many applications use openssl) re...
Read more

All overlapping substrings matching a java regex -

-
is there api method returns (possibly overlapping) substrings match regular expression? for example, have text string: string t = 04/31 412-555-1235; , , have pattern: pattern p = new pattern("\\d\\d+"); matches strings of 2 or more characters. the matches are: 04, 31, 412, 555, 1235. how overlapping matches? i want code return: 04, 31, 41, 412, 12, 55, 555, 55, 12, 123, 1235, 23, 235, 35. theoretically should possible -- there obvious o(n^2) algorithm enumerates , checks substrings against pattern. edit rather enumerating substrings, safer use region(int start, int end) method in matcher . checking pattern against separate, extracted substring might change result of match (e.g. if there non-capturing group or word boundary check @ start/end of pattern). edit 2 actually, it's unclear whether region() expect zero-width matches. specification vague, , experiments yield disappointing results. for example: string line = "xx90xx"; strin...
Read more