How to Retrieve Multimedia data from Remote server and store document directory using Objective c - iphone

Question

Hi every One I am new to iPhone. I am retrieving data from remote server with using nsurlconnection and json parser..I am downloaded only one file from the server and i stored in documents path. But in my server url number of files are there like (images,audios,video,text files). How to download at a time when app lunch and save it in document directory. And also i want the same file name in documents as the file name in the server.
I have tried these way .
ViewController
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController
{
NSMutableData *responseData;
NSArray *filesCount;
}
#property(nonatomic,retain)NSArray *filesCount;
#property(nonatomic,retain) NSMutableData *responseData;
#end
.m viewController
#import "ViewController.h"
#import "JSON/JSON.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize filesCount,responseData;
- (void)viewDidLoad
{
[super viewDidLoad];
responseData =[[NSMutableData data]retain];
NSURLRequest *request=[NSURLRequest requestWithURL:[NSURL URLWithString:#"http://XXXXXXX/XXXXX/filesCount.php"]];
[[NSURLConnection alloc]initWithRequest:request delegate:self];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
[responseData setLength:0];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
[responseData appendData:data];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
UIAlertView *alert=[[UIAlertView alloc]initWithTitle:#"" message:#"DidFailWithError" delegate:self cancelButtonTitle:#"Ok" otherButtonTitles: nil];
[alert show];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection{
[connection release];
NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
[responseData release];
NSLog(#"response string is %#",responseString);
NSError *error;
SBJSON *json = [[SBJSON new] autorelease];
filesCount = [json objectWithString:responseString error:&error];
[responseString release];
NSLog(#"filesCount is %#",filesCount);
if (filesCount==nil) {
UIAlertView *alert=[[UIAlertView alloc]initWithTitle:#"" message:#"Json parsing failed" delegate:self cancelButtonTitle:#"ok" otherButtonTitles: nil];
[alert show];
}
else{
NSMutableString *text = [NSMutableString stringWithString:#"\n"];
for (int i = 0; i < [filesCount count]; i++)
[text appendFormat:#"%#\n", [filesCount objectAtIndex:i]];
NSLog(#"text is %s",[text UTF8String]);
UIImage *img = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:text ]]];
NSData *addImageData = UIImagePNGRepresentation(img);
NSFileManager *fileManager = [NSFileManager defaultManager];
NSRange lastComma= [text rangeOfString:#"/" options:NSBackwardsSearch];
NSString *requiredSubString = [text substringFromIndex:(lastComma.location+1)];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDir = [paths objectAtIndex:0];
NSString *savedImagePath = [documentsDir stringByAppendingPathComponent:requiredSubString];
[fileManager createFileAtPath:savedImagePath contents:addImageData attributes:nil];
NSLog(#"Saved Document dir %#",savedImagePath);
UIAlertView *alert1=[[UIAlertView alloc]initWithTitle:#"" message:#"files are downloaded" delegate:self cancelButtonTitle:#"ok" otherButtonTitles: nil];
[alert1 show];
}
}
Please help me What wrong i mad.

Answer 1

I'm sorry, I really can't read your question very well. From what I see though you might benefit from looking at AFNetworking (https://github.com/AFNetworking/AFNetworking). It simplifies the process of downloading, and is rock-solid.
Look here for a nice tutorial: http://mobile.tutsplus.com/tutorials/iphone/ios-sdk_afnetworking/