objective c - How to retrieve Downloaded content in iOS? -

in app i've downloaded mp3 file , stored giving file name write abc.mp3, while storing file path shown this:

/var/mobile/containers/data/application/9afc500a-91d5-421b-8a5f-19a239456353/documents/abc.mp3 

and when play path is

file:///var/mobile/containers/data/application/9afc500a-91d5-421b-8a5f-19a239456353/documents/abc.mp3 

the code play is:

nsurl* songurl = [nsurl fileurlwithpath:songurlstring]; mediaplayer = [[avplayer alloc]initwithurl:url ];  //this avplayer instance [mediaplayer play]; 

the code download is:

-

(void)downloadcontent:(nsstring*)stringurl{     stringurl = [stringurl stringbyreplacingoccurrencesofstring:@" " withstring:@"%20"];     currenturl = stringurl;     nsurl *url = [nsurl urlwithstring:stringurl];     nsurlrequest *therequest = [nsurlrequest requestwithurl:url         cachepolicy:nsurlrequestreloadignoringlocalcachedata  timeoutinterval:60];     receiveddata = [[nsmutabledata alloc] initwithlength:0];     nsurlconnection * connection = [[nsurlconnection alloc] initwithrequest:therequest delegate:self     startimmediately:yes];    }   - (void) connection:(nsurlconnection *)connection didreceiveresponse:(nsurlresponse *)response {     [uiapplication sharedapplication].networkactivityindicatorvisible = yes;     progress.hidden = no;     [receiveddata setlength:0];     expectedbytes = [response expectedcontentlength]; }  - (void) connection:(nsurlconnection *)connection didreceivedata:(nsdata *)data {     [receiveddata appenddata:data];     float progressive = (float)[receiveddata length] / (float)expectedbytes;     progress.value = progressive;     nslog(@"%f",progressive); }  - (void) connection:(nsurlconnection *)connection didfailwitherror:(nserror *)error {     [uiapplication sharedapplication].networkactivityindicatorvisible = no;  }  - (nscachedurlresponse *) connection:(nsurlconnection *)connection willcacheresponse:    (nscachedurlresponse *)cachedresponse {     return nil; }  - (void) connectiondidfinishloading:(nsurlconnection *)connection {     nsarray *paths = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes);      nsstring *documentsdirectory = [paths objectatindex:0];     nslog(@"%@",documentsdirectory);     nsstring *pdfpath = [documentsdirectory stringbyappendingpathcomponent:@"abc.mp3"];     nslog(@"succeeded! received %lu bytes of data",(unsigned long)[receiveddata length]);     [uiapplication sharedapplication].networkactivityindicatorvisible = no;     [receiveddata writetofile:pdfpath atomically:yes];     progress.hidden = yes; } 

so problem not playing content. don't know whether content written file or not.

you "given" arbitrary documents folder system (that nsdocumentdirectory) can't guarantee it's full exact path. solve this, should, "build" path every time need file it, same way did when wrote file:

//build path nsarray *paths = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes); nsstring *documentsdirectory = [paths objectatindex:0]; nsstring *path = [documentsdirectory stringbyappendingpathcomponent:@"abc.mp3"];  //then can do: nsurl* songurl = [nsurl fileurlwithpath: path]; mediaplayer = [[avplayer alloc]initwithurl:url ]; [mediaplayer play]; 

note used code use build path when downloading file.