i am working on an app for a magazine, it is simply a PDF reader with in-app purchase.
i can download the new content as a zip file from the server after in-app purchase. but i dont know what to do after that.
how can i handle this downloaded file and display in the PDF Reader?
you may save it somewhere, ex. to the documents folder.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
// the path to write file
NSString *appFile = [documentsDirectory stringByAppendingPathComponent:#"myFile"];
[data writeToFile:appFile atomically:YES];
Related
I have an ipad app in which i show PDF documents in a UIWebView from my server.I want users to be able to download these documents so that they can read them offline. However i want them to read it only in the app.Basically my question is: Is it possible to have a folder that is only accessible from the app but not by users.
you can save it in the app bundle.
NSDate *date = [NSDate new];
NSString *docName = [NSString stringWithFormat:#"%lld.pdf", (long long)[date timeIntervalSince1970]];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder
dataPath = [documentsDirectory stringByAppendingPathComponent:docName];
EDIT: acording your comments question i think the solution would be something like this:
NSString *str = #"http://myserver.com/myfile.ext";
NSURL *url = [NSURL URLWithString:str];
NSData *content = [NSData dataWithContentsOfURL:url];
if (content) {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder
NSString *dataPath = [NSString stringWithFormat:#"%#/%#", documentsDirectory,#"myfile.ext"];
[content writeToFile:dataPath atomically:YES];
}
Steps:
Create password to PDF file and Open PDF programatically with password.
You can Make Own DRM for PDF files.
Refer Following Link:
iPhone Documents Folder Library/Caches Security issue
Hey guys a quick question!
I am making an iPad app which uses the dropbox sync api. Now I am wondering how to play movie files within my dropbox filesystem in the MPMovieplayer. Since the dropbox filesystem is not the same as the local sandbox and I don't know how to retrieve a nsurl of the file I can't play the video.
This is something I tried (my last hope) but it doesn't work:
+(NSString*)loadMovie : (DBPath*)path
{
DBFile *file = [self openFileAtPath:path];
NSData *data = [[NSData alloc] initWithData:[file readData:nil]];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *vpath = [documentsDirectory stringByAppendingPathComponent:file.info.path.name];
[[NSFileManager defaultManager] createFileAtPath:vpath contents:data attributes:nil];
return vpath;
}
You'll need to write the file out to local storage first. See https://forums.dropbox.com/topic.php?id=110085 on the Dropbox forum.
I am writing an app that can access the iOS root system, the user should be able to save files to his document directory. I am using this code to save the file to the document directory.
For Text:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
[self.filePath writeToFile:[NSString stringWithFormat:#"%#/%#", documentsDirectory, [self.filePath lastPathComponent]]
atomically:YES
encoding:NSUTF8StringEncoding error:nil];
For other files:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
[self.filePath writeToFile:[NSString stringWithFormat:#"%#/%#", documentsDirectory,[self.filePath lastPathComponent]]
atomically:YES];
My problem is I can save .txt files, but not other files, If I save for example .plist files with the save text methods, the contact is replaced by the directory path of the file. When I save a picture, or any other file it isn't readable. Is there a good method to save files without destroying them?
You're calling [self.filePath writeToFile:], thus writing the contents of the filePath variable to a file.
You should do something like:
[contents writeToFile:...]
Here you have an example of saving the image:
assuming you get the content of the image into NSData object:
NSData *pngData = UIImagePNGRepresentation(image);
then write it to a file:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0]; //Get the docs directory
NSString *filePath = [documentsPath stringByAppendingPathComponent:#"image.png"]; //Add the file name
[pngData writeToFile:filePath atomically:YES]; //Write the file
Have a look into these questions for more detailed explanations:
Write a file on iOS
Save An Image To Application Documents Folder From UIView On IOS
i want to play video from html 5 file by zipping and unzip file programmatically of this link
http://enhancelearning.co.in/downloads/HTML5.zip
this file contain 4 html file
zip and unzip successfully created but video not playing in web view
here is th my code
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docspath = [paths objectAtIndex:0];
paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
// NSString *cachePath = [paths objectAtIndex:0];
NSString *zipFile = [docspath stringByAppendingPathComponent:#"001.html"];
NSURL *url = [NSURL fileURLWithPath:zipFile];
[webVew loadRequest:[NSURLRequest requestWithURL:url]];
Try first to put this html file somewhere in the net and see if the video playing when you go to this page from safari.
It's probably HTML-Safari-ios problem, and this way it easier to debug.
I'm trying to make a txt log file with the actions that happens in my app. I want to save some text whenever the app is connecting to the server o displaying new info.
Well, how do I write to a file? I've tried using the method writeToFile: but it's not working because fileExistsAtPath: is returning NO.
My code is:
NSString *file_path = #"mylog.txt";
NSString *log = #"Hello World!!\n";
[log writeToFile:file_path atomically:YES encoding:NSUnicodeStringEncoding error:nil];
Thanks!
PS: Oh, would it be readable through Organizer with the iPhone plugged in?
You should use the < App_Home >/Documents folder for storing Documents
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *file_Path = [documentsDirectory stringByAppendingPathComponent:#"log.txt"];
[log writeToFile:file_path atomically:YES encoding:NSUnicodeStringEncoding error:nil];
But normally if you want to see and dump things while running the app,
you could just use NSLog() which outputs it in the console.
Try this method I wrote:
+(NSString*)createPath:(NSString*)fileName{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *localizedPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:#"%#",fileName]];
//NSLog(#"%#",localizedPath);
return localizedPath;
}
It will return you a path for your file. You only need to give it a name.