How to store JSON data in a file? - ios

Question

I am building an article reading iOS app.
I have a .json file in match folder named as Data.json
I am not able to write data into it.
Here is my code:
- (void)writeJsonToFile {
//applications Documents dirctory path
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
//live json data url
NSString *stringURL = ysURL;
NSURL *url = [NSURL URLWithString:stringURL];
NSData *urlData = [NSData dataWithContentsOfURL:url];
//file to write to
NSString *filePath = [NSString stringWithFormat:#"%#/%#", documentsDirectory, #"Data.json"];
//attempt to download live data
if (urlData) {
[urlData writeToFile:filePath atomically:YES];
}
//copy data from initial package into the applications Documents folder
else {
//file to write to
NSString *filePath = [NSString stringWithFormat:#"%#/%#", documentsDirectory, #"Data.json"];
//file to copy from
NSString *json = [[NSBundle mainBundle] pathForResource:#"Data" ofType:#"json" inDirectory:#"/match/Data.json"];
NSData *jsonData = [NSData dataWithContentsOfFile:json options:kNilOptions error:nil];
//write file to device
[jsonData writeToFile:filePath atomically:YES];
}
}

Answer 1

Try using NSStrings method to write the file, and check your error code:
NSURL *fileUrl = [[NSBundle mainBundle] URLForResource: #"Data" withExtension:#"json"];
NSError * error;
[json writeToURL:fileUrl atomically:YES encoding:NSUTF8StringEncoding error:&error];
NSLog(#"%#",error.localizedDescription);

Answer 2

can you tell us more about the problem you have ?
1) You don't have to redefine the filePath in the else because you already did before.
NSString *filePath = [NSString stringWithFormat:#"%#/%#", documentsDirectory, #"Data.json"];
And you should use stringByAppendingPathComponent which automaticaly add the / you will need or not :
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:#"Data.json]
2) Are you sure your Data.json is include in your project ? do you get a nil ?
NSString *json = [[NSBundle mainBundle] pathForResource:#"Data" ofType:#"json" inDirectory:#"/match/Data.json"];
3) For the problem of not load : </Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.pl​atform/Developer/SDKs/iPhoneSimulator7.1.sdk/System/Library/AccessibilityBundles/CertUIFramework.axbundle> (not loaded)
Cannot find executable for CFBundle CertUIFramework.axbundle