i think the title says all. I use some example code i found here but the file will not be created.
- (id)init {
[[NSBundle mainBundle] loadNibNamed:#"PadContent" owner:self options:nil];
if ([[NSFileManager defaultManager] fileExistsAtPath:[self filePathOfBookmarks]]) {
bookmarks = [[NSMutableDictionary alloc]
initWithContentsOfFile:[self filePathOfBookmarks]];
} else {
bookmarks = [[NSMutableDictionary alloc] init];
NSLog(#"file does not exist");
}
return self;
}
- (void)addBookmark:(id)sender{
[bookmarks setObject:[dataInstance chapter] forKey:[[dataInstance chapter]title]];
[bookmarks setObject:[dataInstance chapter] forKey:#"test"];
NSLog(#"count: %d", [bookmarks count]);
NSLog([self filePathOfBookmarks]);
[bookmarks writeToFile:[self filePathOfBookmarks] atomically:YES];
}
- (NSString *) filePathOfBookmarks {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docDirectory = [paths objectAtIndex:0];
return [docDirectory stringByAppendingPathComponent:#"bookmarks"];
}
What's in your dictionary? There are only certain base objects that can be written out and read back without any additional work on your part. If your dictionary includes a custom object that you defined, you'll need to use another mechanism to write and read back the data, such a an NSArchiver. I am guessing that whatever [dataInstance chapter] yields is not among these basic object types.
See the documentation for NSDictionary's writeToFile:atomically: for the data types that can be read and written automatically. Also look at NSArchiver and the NSCoding protocol.
Related
In my app, plist files are being saved to the documents directory, each file name is the current date+time.
I'm loading the list of files from the documents directory to a table: filesTableVC.m.
Each time I want to load the chosen file to a new class: oldFormVC.m
but this class is opened empty.
I'm not sure where the problem is.
filesTableVC.m:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
oldFormVC *oldForm = [[oldFormVC alloc] initWithNibName:nil bundle:nil];
//load previous data:
// get paths from root direcory
NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
// get documents path
NSString *documentsPath = [paths objectAtIndex:0];
// get the path to our Data/plist file
NSString *plistPath = [documentsPath stringByAppendingPathComponent:[fileList objectAtIndex:indexPath.row]];
// check to see if Data.plist exists in documents
if (![[NSFileManager defaultManager] fileExistsAtPath:plistPath])
{
// if not in documents, get property list from main bundle
plistPath = [[NSBundle mainBundle] pathForResource:#"Data" ofType:#"plist"];
}
// read property list into memory as an NSData object
NSData *plistXML = [[NSFileManager defaultManager] contentsAtPath:plistPath];
NSString *errorDesc = nil;
NSPropertyListFormat format;
// convert static property liost into dictionary object
NSDictionary *temp = (NSDictionary *)[NSPropertyListSerialization propertyListFromData:plistXML mutabilityOption:NSPropertyListMutableContainersAndLeaves format:&format errorDescription:&errorDesc];
if (!temp)
{
NSLog(#"Error reading plist: %#, format: %d", errorDesc, format);
}
// assign values
self.theDate = [temp objectForKey:#"theDate"];
self.theTime = [temp objectForKey:#"theTime"];
self.carNumber = [temp objectForKey:#"carNumber"];
self.driverName = [temp objectForKey:#"driverName"];
[self presentViewController:oldForm animated:YES completion:nil];
}
oldFormVC.m:
- (void)viewDidLoad
{
[super viewDidLoad];
dateField.text = theDate;
timeField.text = theTime;
carNumberField.text = carNumber;
driverNameField.text = driverName;
}
Write your code in viewDidAppear
- (void)viewDidAppear:(BOOL)animated
{
dateField.text = theDate;
timeField.text = theTime;
carNumberField.text = carNumber;
driverNameField.text = driverName;
}
Also, change this code in filesTableVC.m:
oldForm.dateField = [temp objectForKey:#"theDate"];
oldForm.theTime = [temp objectForKey:#"theTime"];
oldForm.carNumber = [temp objectForKey:#"carNumber"];
oldForm.driverName = [temp objectForKey:#"driverName"];
Hope it helps you
Here's my delegate method for UIAlertView. I have no idea why myWordsDictionary is null when running the app. (Note: _dailyWords is an NSDictionary object and bookmarked is an NSString object.)
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex != [alertView cancelButtonIndex]) {
NSLog(#"Clicked button index !=0");
// Add the action here
NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *myWordsPath = [documentPath stringByAppendingPathComponent:#"MyWords.plist"];
NSMutableDictionary *myWordsDictionary = [[NSMutableDictionary alloc] initWithContentsOfFile:myWordsPath];
[myWordsDictionary setValue:[_dailyWords objectForKey:bookmarked] forKey:bookmarked];
[myWordsDictionary writeToFile:myWordsPath atomically:YES];
NSLog(#"%#", [myWordsDictionary description]);
[myWordsDictionary release];
} else {
NSLog(#"Clicked button index = 0");
// Add another action here
}
}
Thanks in advance.
myWordsPath may not contain any valid file, and you are initializing your NSMutableDictionary from content of the the file present at that path. That's why you are getting a null dictionary.
First, try check myWordsPath, if it returns null, you should look and find correct path.
Second, how you generate your plist? MyWords.plist must contain valid format. If you unsure, you should create from within XCode, there is plist object.
NSBundle *bundle = [NSBundle mainBundle];
NSString *plistPath = [bundle pathForResource:
#"MyWords" ofType:#"plist"];
NSDictionary *dictionary = [[NSDictionary alloc]
initWithContentsOfFile:plistPath];
please try this code..
NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
documentPath = [documentPath stringByAppendingPathComponent:#"MyWords.plist"];
NSMutableDictionary *myWordsDictionary = [[NSMutableDictionary alloc] initWithContentsOfFile:documentPath];
is there a possibility to check for an object in an array by name.
At some point in my app I need to access the plist and pull information stored under an object which I found by its name.
The reason I need to do this is because I don't have the integer number under which where the object is placed in my array.
I have started the usual procedure but i'm not getting anywhere. Maybe its just getting a little too late for me....
This is how my plist looks
Array
Dictionary
title ...
text ...
ect ...
Dictionary
title ...
text ...
ect ...
Dictionary
title ...
text ...
ect ...
My code so far isn't helping at all. I'm definitely doing something wrong.
-(NSString*)nameFromPlist:(NSString*)name {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *writableDBPath = [documentsDirectory stringByAppendingPathComponent:#"Orte.plist"];
_regionArray = [NSArray arrayWithContentsOfFile:writableDBPath];
NSString *string = [[NSString alloc]init];
for(NSDictionary *dict in _regionArray) {
string = [[dict objectForKey:name] valueForKey:#"title"];
}
return [NSString stringWithFormat:#"%#",string];
}
My string is just returning null.
Any ideas anyone?
Thanks a lot!
ANSWER:
Here is the code for everyone:
-(NSString*)nameFromPlist:(NSString*)name {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *tmpFileName = [[NSString alloc] initWithFormat:#"Orte.plist"];
NSString *path = [documentsDirectory stringByAppendingPathComponent:tmpFileName];
NSString *string;
NSMutableArray *array = [NSMutableArray arrayWithContentsOfFile:path];
NSDictionary *dict = [[NSDictionary alloc] init];
NSString *title;
for (int i=0; i<[array count]; i++) {
dict = [array objectAtIndex:i];
title = [dict valueForKey:#"title"];
if([title isEqualToString:name]) {
string = [dict valueForKey:#"title"];
NSLog(#"Titel: %#", string);
}
}
return [NSString stringWithFormat:#"%#",string];
}
Thank a lot everyone!
First you don't need to alloc the NSString, 'cause you'll get a different one from valueForKey.
Then if I understood right what you want to get a better code may be something that make use of NSPredicate or the block-based indexOfObjectPassingTest. Both iterate across the array and perform a test on the elements to get you the matching elements (or the index of them).
NSString* plistPath = [[NSBundle bundleForClass:[self class]] pathForResource:#"<PlistFileName>" ofType:#"plist"];
NSArray *array = [[NSArray alloc] initWithContentsOfFile:plistPath];
NSMutableArray* titles = [[NSMutableArray alloc] init];
for (NSDictionary* d in array)
[titles addObject:[d objectForKey:#"title"]];
NSLog(#"Object found at index %i", [a indexOfObject:#"<Your object name>"]);
Make sure you're testing against NSNotFound for failure to locate, and not (say) 0.
I don't want anything to be backed up to iCloud. However, my data cannot be recreated, so I need to place it in my application's documents directory. For each file, I did the standard:
- (BOOL)addSkipBackupAttributeToItemAtURL:(NSURL *)URL
{
if (&NSURLIsExcludedFromBackupKey == nil) { // iOS <= 5.0.1
const char* filePath = [[URL path] fileSystemRepresentation];
const char* attrName = "com.apple.MobileBackup";
u_int8_t attrValue = 1;
int result = setxattr(filePath, attrName, &attrValue, sizeof(attrValue), 0, 0);
return result == 0;
} else { // iOS >= 5.1
return [URL setResourceValue:[NSNumber numberWithBool:YES] forKey:NSURLIsExcludedFromBackupKey error:nil];
}
}
I have 5mB of data in there. But my app is still registering 0.2kB in iCloud (Through settings->iCLoud->Manage Storage). So, just to be sure, I did this:
-(void)resetBackupAttributes {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSArray *fileListAct = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:documentsDirectory error:nil];
for (NSString *path in fileListAct) {
[self addSkipBackupAttributeToItemAtURL:[NSURL fileURLWithPath:path]];
}
NSArray *paths2 = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *cacheDirectory = [paths2 objectAtIndex:0];
NSArray *fileListCache = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:cacheDirectory error:nil];
for (NSString *path in fileListCache) {
[self addSkipBackupAttributeToItemAtURL:[NSURL fileURLWithPath:path]];
}
NSArray *paths3 = NSSearchPathForDirectoriesInDomains(NSPreferencePanesDirectory, NSUserDomainMask, YES);
NSString *preferencesDirectory = [paths3 objectAtIndex:0];
NSArray *fileListPref = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:preferencesDirectory error:nil];
for (NSString *path in fileListPref) {
[self addSkipBackupAttributeToItemAtURL:[NSURL fileURLWithPath:path]];
}
}
It still has 0.2kB! Is there something I am missing? Does a small amount of data gets backed up regardless... like a directory tree or something? What I really want to know is, will this 0.2kB get me rejected for not following the data storage guidelines?
ok so I will put my comment into an answer:
is it possible that your apps default plist gets backed up in the
cloud? - BUT you could hook up a proxy between your iOS (simulator)
and the internet. Just catch all outgoing data and see whats actually
get transmitted ;). e.g. SquidMan
here's the link to SquidMan just in case …
As you said you think its the plist too. You can verify that by setting a key with some junk data and see if the total amount rises. ;)
I'm trying to load a simply TXT file into a NSMutableArray. My file is called NoteBook.txt. For the following purposes (handling errors), I deleted NoteBook.txt so that the App could actually NOT load it.
In the following code, I try to find out if the file exist in my Docs Folder which I'd like to load. The following code should actually NOT attempt to load the file as there isn't one. However, it does so nonetheless and I am wondering what I am doing wrong?
Imagine that the string #"NoteBook.txt" is passed to the following method and that there is no such file in the Docs Folder of the App:
-(void) loadNoteBook:(NSString *)nameOfNoteBook
{
NSLog(#"Starting method 'LoadNoteBook...'");
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents directory
//NSString *filePath = [documentsDirectory stringByAppendingPathComponent:#"NoteBook.txt"];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:nameOfNoteBook];
NSError *error;
if (filePath) { // check if file exists - if so load it:
NSLog(#"Loading notebook: %#", nameOfNoteBook);
NSString *tempTextOut = [NSString stringWithContentsOfFile:filePath
encoding:NSUTF8StringEncoding
error:&error];
self.NoteBook = [[[tempTextOut componentsSeparatedByString: #"\n*----------*\n"] mutableCopy] autorelease];
}
else
{
// GENERATE mutable ARRAY
NSLog(#"Loading notebook failed, creating empty one...");
NoteBook = [[NSMutableArray alloc] init];
for (int temp = 0; temp < 6; temp++) {
[NoteBook insertObject:#"Empty" atIndex:temp];
}
}
}
Thanks for any suggestions, I'd really appreciate your help.
The problem is that you're checking if the NSString is set, not the path itself.
What you should probably do is check the path with NSFileManager fileExistsAtPath:isDirectory:
BOOL isDir;
NSFileManager *fileManager = [[[NSFileManager alloc] init] autorelease];
if ([fileManager fileExistsAtPath:filePath isDirectory:&isDir] && !isDir) {
//file exists and is not a directory
}
You've got it already in your code:
NSString *tempTextOut = [NSString stringWithContentsOfFile:filePath
encoding:NSUTF8StringEncoding
error:&error];
if(!tempTextOut) {
if(error) {
// error specific code to execute
NSLog(#"error loading file %#: %#", filePath, error);
}
// GENERATE mutable ARRAY
NSLog(#"Loading notebook failed, creating empty one...");
NoteBook = [[NSMutableArray alloc] init];
for (int temp = 0; temp < 6; temp++) {
[NoteBook insertObject:#"Empty" atIndex:temp];
}
} else {
self.NoteBook = [[[tempTextOut componentsSeparatedByString: #"\n*----------*\n"] mutableCopy] autorelease];
}
You test on filePath, which is actually just a string you've created. You don't test if there is a file behind it. Even if
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
does return an empty string you still append nameOfNoteBook to it and will if put in an if statement, testing against a non empty string will evaluate to true.