download file through coding - iphone

I would like to save a file in my application which I have created with code:
NSArray *arrayPathsForImg =
NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask,
YES);
NSString *pathForImg = [arrayPathsForImg objectAtIndex:0];
pathForImg = [pathForImg stringByAppendingPathComponent:#"a.txt"];
[self.importUrlData writeToFile:pathForImg atomically:YES];
Now I want to download it to my iPhone?


If you meant "read" the file:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:#"a.txt"];
And now use a initWithContentsOfFile: method. For example I used the code above to read from a property list and used the following code to get the data into a NSDictionary:
NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:filePath];

Related

can't creating plist file in document folder

I have write code like this in Viewdidload method. But it don't create file .plist.
I don't know whether code is wi8 or wrong. And where i have to write?
NSError *error;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0]; //2
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"data1.plist"]; //3
NSFileManager *fileManager = [NSFileManager defaultManager];
if ( ![fileManager fileExistsAtPath:path] ) {
NSString *pathToSettingsInBundle = [[NSBundle mainBundle]
pathForResource:#"data1" ofType:#"plist"];
}

You have just created a path to it, you should try loading it into a NSDictionary.
NSDictionary* mydictionary = [ NSDictionary dictionaryWithContentsOfFile: pathToSettingsInBundle];

Inside your if block add a second line
[fileManager copyItemAtPath:pathToSettingsInBundle toPath:path error:&error];

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
plistpath = [[NSString alloc] initWithString:[documentsDirectory stringByAppendingPathComponent:#"Product.plist"]];
And then
[array writeToFile:path atomically:YES];
[Whatever [Array or Dictionary] you want to Write in Plist]
If it is still not creating the plist then check whether your array or dictionary must be empty.

Problem writing NSData in my device

Can someone explain me why my code doesn't work?
//get the documents directory:
NSArray *paths = NSSearchPathForDirectoriesInDomains
(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
//make a file name to write the data to using the
//documents directory:
NSString *fullFileName = [NSString stringWithFormat:#"%#/subscriptions", documentsDirectory];
[dataReply writeToFile:fullFileName atomically:NO];
NSData *getData=[[NSData alloc]initWithContentsOfFile:fullFileName];
infact if I try
NSString *string = [[NSString alloc] initWithData:getData encoding:NSASCIIStringEncoding];
while if I load myData without save it to my device it works! (So I'm sure that my data is not empty)

Try This,
NSArray *paths = NSSearchPathForDirectoriesInDomains
(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
//make a file name to write the data to using the
//documents directory:
NSString *fullFileName = [NSString stringWithFormat:#"%#/subscriptions", documentsDirectory];
[dataReply writeToFile:fullFileName atomically:NO];
Nsdata *getData=[fullFileName dataUsingEncoding:NSUTF8StringEncoding];

VMTRACER and Memory

i try to delete Dirty Memory and u se VMTRACE but i dont know why this code have dirty memory
NSString* documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"Info.plist"];
NSDictionary *dict =[[[NSDictionary alloc] initWithContentsOfFile:path] autorelease];

Problem with reading/writing plist

I have an MSMutableArray that contains many NSDictionaries. A dictionary is just an NSString with a key "symbol".
I am writing my array to a plist:
+ (void)writeObjectToPList:(id)myData {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"mobile-watchlist.plist"];
[myData writeToFile:path atomically:YES];
}
How can I read this back as an array?

You can read the file back like this --
NSArray *array = [NSArray arrayWithContentsOfFile:path];

writeToFile path?

I'm wondering what is the default path when saving a file using the NSArray writeToFile:atomically: method...?
[array writeToFile:#"myFile.plist" atomically:YES];
10x

It will save your file at Document directory.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *basePath = [paths objectAtIndex:0];
this is the path where your file will be saved.

I executed the following code:
if ([#"asdasdasd" writeToFile:#"foo123456.txt" atomically:YES]) {
NSLog(#"+++");
} else {
NSLog(#"---");
}
On the simulator the file foo123456.txt popped up in my root of my HD. The console printed +++, so the operation was successful.
On the device it failed, printing ---.

Use This Code.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
plistpath = [[NSString alloc] initWithString:[documentsDirectory stringByAppendingPathComponent:#"Product.plist"]];
And then
[array writeToFile:path atomically:YES];
[Whatever [Array or Dictionary] you want to Write in Plist]
If it is still not creating the plist then check whether your array or dictionary must be empty.