Hi I am trying to make bookmarks for my browser.
Title of Page, Url of Page, any Comments related to page.
I tried to save it in plist, but unsuccessful. Can anyone can help me to save these thing to plist and retrive in table view. So, when user tap on title it will open url in UIWebView.
Here is the code I have tried, so far:
NSError *error;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"bookmarks.plist"];
NSFileManager *fileManager = [NSFileManager defaultManager];
if (![fileManager fileExistsAtPath: path])
{
NSString *bundle = [[NSBundle mainBundle] pathForResource:#"bookmarks" ofType:#"plist"];
[fileManager copyItemAtPath:bundle toPath: path error:&error]; //6
}
NSMutableDictionary *data = [[NSMutableDictionary alloc] initWithContentsOfFile: path];
NSString *writeUrl = #"Page URL One";
NSString *writeTitle = #"Page Title One";
NSString *writeComment = #"Page comments";
[data setObject:[NSString stringWithString:writeUrl] forKey:#"url"];
[data setObject:[NSString stringWithString:writeTitle] forKey:#"title"];
[data setObject:[NSString stringWithString:writeComment] forKey:#"comment"];
[data writeToFile: path atomically:YES];
NSMutableDictionary *savedUrl = [[NSMutableDictionary alloc] initWithContentsOfFile: path];
NSString *value;
value = [[savedUrl objectForKey:#"url"] stringValue];
NSLog(#"%#", value);
UPDATE: I successfully saved and retrieved data to and from plist. Issue is comming in this line
value = [[savedUrl objectForKey:#"url"] stringValue];
By removing stringValue solve the problem.
value = [savedUrl objectForKey:#"url"];
Now My second issue. I make three items named url, title, comment, types String in plist file.
How can i store different urls. Like
name website: inforains
url: inforains.com
title: Info Rains
comment: good website articles
name website: hitechnology
url: hitechnology.com
title: Hitechnology
comment: hmmm
ans soo on..
how can I store data like this.. so all name website will show on tableview and when user click on anyone, data related to that website will show. I hope i clear my question.
To store multiple records as three items named url, title, comment, types String in plist file
change types from string to dictionary and store data in each dictionary individually for key as 1,2,3 ...
OR
Use three mutable array for each url,title and comment and add object at index 0 at the time of saving it.
and access them when required as nsmutable array.
Change this line
value = [[savedStock objectForKey:#"url"] stringValue];
to
value = [savedUrl objectForKey:#"url"];
because you are saving NSString in dictionary... not NSNumber.
Second issue:
//create mutable array to save all objects
NSMutableArray *objectsArray = [data objectForKey:#"objectsArray"];
if(!objectsArray) {
objectsArray = [[NSMutableArray alloc] init];
}
//create and add dictionary into array
NSDictionary *dictionary = [[NSDictionary alloc] initWithObjects:[NSArray arrayWithObjects:#"url1", #"title1", #"comment2",nil] forKeys:[NSArray arrayWithObjects:#"url", #"title", #"comment",nil]];
[objectsArray addObject:dictionary];
[data setObject:objectsArray forKey:#"objectsArray"];
[data writeToFile: path atomically:YES];
// to read data
NSMutableDictionary *savedUrl = [[NSMutableDictionary alloc] initWithContentsOfFile: path];
NSMutableArray *objectsArraySAved = [savedUrl objectForKey:#"objectsArray"];
for (NSMutableDictionary *dic in objectsArraySAved) {
NSLog(#"URL %#", [dic valueForKey:#"url"]);
}
Are you sure [data writeToFile: path atomically:YES]; works? It returns a BOOL, you should check it.
Are you sure savedURL != nil?
For your new problem, you should put all your dictionaries in a mutable array.
NSMutableArray *bookmarkArray = [[NSMutableArray alloc]init];
[bookmarkArray addObject:data];
Related
This question already has answers here:
Working with data in iOS Apps (What to choose? NSData, CoreData, sqlite, PList, NSUserDefaults)
(2 answers)
Closed 9 years ago.
I've been struggling with this for ages now and I really need some good help here. :)
I have an app where I'm parsing a quite big JSON into appdelegate's didFinishLaunchingWithOptions.
My Model Objects are:
Tab:
NSString *title
NSMutableArray *categories
Category:
NSString *title
NSMutableArray *items
Item
NSString *title
NSString *description
UIImage *image
I need to save the data locally, cause the parsing takes about 15 seconds every time my app starts. I'm using the SBJSON framework.
Here's my code for parsing:
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"json_template" ofType:#"json"];
NSString *contents = [NSString stringWithContentsOfFile: filePath encoding: NSUTF8StringEncoding error: nil];
SBJsonParser *jsonParser = [[SBJsonParser alloc] init];
NSMutableDictionary *json = [jsonParser objectWithString: contents];
tabs = [[NSMutableArray alloc] init];
jsonParser = nil;
for (NSString *tab in json)
{
Tab *tabObj = [[Tab alloc] init];
tabObj.title = tab;
NSDictionary *categoryDict = [[json valueForKey: tabObj.title] objectAtIndex: 0];
for (NSString *key in categoryDict)
{
Category *catObj = [[Category alloc] init];
catObj.name = key;
NSArray *items = [categoryDict objectForKey:key];
for (NSDictionary *dict in items)
{
Item *item = [[Item alloc] init];
item.title = [dict objectForKey: #"title"];
item.desc = [dict objectForKey: #"description"];
item.url = [dict objectForKey: #"url"];
if([dict objectForKey: #"image"] != [NSNull null])
{
NSURL *imgUrl = [NSURL URLWithString: [dict objectForKey: #"image"]];
NSData *imageData = [NSData dataWithContentsOfURL: imgUrl];
item.image = [UIImage imageWithData: imageData];
}
else
{
UIImage *image = [UIImage imageNamed: #"standard.png"];
item.image = image;
}
[catObj.items addObject: item];
}
[tabObj.categories addObject: catObj];
}
[tabs addObject: tabObj];
}
What is the best way of doing this? Using Core Data or NSFileManager?
If you have som code example too it will make me very happy.
This is the last thing i need to fix before the app is ready for app store and it just kills me! I can't solve this problem.
If you are working on iOS then you save a file to the Documents folder. On Mac OS X it would be in the Application Support folder. Since you are on iOS, read this answer for how to access the Documents folder.
All of the objects that you want to store should implement NSCoding. The above variables already do. Should you want to store the tabs, categories and items directly they would need to implement NSCoding. Then all you need is to serialize them to a file. When opening you app you can look for this file and get your objects back without parsing.
The code should look something like this (untested and error checking is ommited for brevity):
- (void) saveStateToDocumentNamed:(NSString*)docName
{
NSError *error;
NSFileManager *fileMan = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docPath = [paths[0] stringByAppendingPathComponent:docName];
if ([fileMan fileExistsAtPath:docPath])
[fileMan removeItemAtPath:docPath error:&error];
// Create the dictionary with all the stuff you want to store locally
NSDictionary *state = #{ ... };
// There are many ways to write the state to a file. This is the simplest
// but lacks error checking and recovery options.
[NSKeyedArchiver archiveRootObject:state toFile:docPath];
}
- (NSDictionary*) stateFromDocumentNamed:(NSString*)docName
{
NSError *error;
NSFileManager *fileMan = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docPath = [paths[0] stringByAppendingPathComponent:docName];
if ([fileMan fileExistsAtPath:docPath])
return [NSKeyedUnarchiver unarchiveObjectWithFile:docPath];
return nil;
}
hello I am trying to create a text file that will then store some data
- (IBAction)saveUser:(id)sender{
NSString *name = [nameField stringValue];
NSString *weight = [weightField stringValue];
NSDate *date = [datePick dateValue];
}
I want to be able to create a file that stores the following information and uses the name field as the name of the file. I also want to be able to load the file and read that data from it
Any help is appreciated
Thanking You
This is quite simple. But you might want to look into NSMutableDictionary instead. Both NSString and Dictionary have methods writeToFile:#"filename.txt".
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
[dict setValue:[nameField stringValue] forKey:#"name"];
[dict setValue:[weightField stringValue] forKey:#"weight"];
[dict setValue:date forKey:#"date"];
[dict writeToFile:name atomically:YES];
you read from the file the same way,
NSMutableDictionary *dict = [[NSMutableDictionary alloc] initWithContentsOfFile:name];
As simple as it gets
I think you may get some informations from class NSFileManager, such as like this,
[fileManager createFileAtPath:filePath contents:contentData attributes:NULL];
the contentData is NSData, and it includes the content of what you want to save, the filename is in filePath that you need to set.
Thanks!
I understand I can for instance write a value to a .plist file as such
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"stored" ofType:#"plist"];
NSString *comment = #"this is a comment";
[comment writeToFile:filePath atomically:YES];
But If i had for say an Array inside my .plist (gameArray) and I'd like to white comment into a particular index of my array i.e. gameArray[4] ; how would I do this ?
allow me to clarify
I have a plist: stored.plist
inside my plist there is an array gameArray
i would like to update specific indexes of gameArray inside the plist
is this possible ?
You cannot update and save data in application's main bundle instead you have to do in document directory or other directory like this:
NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *plistFilePath = [documentsDirectory stringByAppendingPathComponent:#"stored.plist"];
if([[NSFileManager defaultManager] fileExistsAtPAth:plistFilePath])
{//already exits
NSMutableArray *data = [NSMutableArray arrayWithContentsOfFile:plistFilePath];
//update your array here
NSString *comment = #"this is a comment";
[data replaceObjectAtIndex:4 withObject:comment];
//write file here
[data writeToFile:plistFilePath atomically:YES];
}
else{ //firstly take content from plist and then write file document directory
NSString *plistPath = [[NSBundle mainBundle] pathForResource:#"stored" ofType:#"plist"];
NSMutableArray *data = [NSMutableArray arrayWithContentsOfFile:plistPath];
//update your array here
NSString *comment = #"this is a comment";
[data replaceObjectAtIndex:4 withObject:comment];
//write file here
[data writeToFile:plistFilePath atomically:YES];
}
Assuming the contents of 'stored.plist' is an array, you need to instantiate a mutable array from the path:
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"stored" ofType:#"plist"];
NSMutableArray *array = [NSMutableArray arrayWithContentsOfFile:filePath];
NSString *comment = #"this is a comment";
// inserting a new object:
[array insertObject:comment atIndex:4];
// replacing an existing object:
// classic obj-c syntax
[array replaceObjectAtIndex:4 withObject:4];
// obj-c literal syntax:
array[4] = comment;
// Cannot save to plist inside your document bundle.
// Save a copy inside ~/Library/Application Support
NSURL *documentsURL = [[[NSFileManager defaultManager] URLsForDirectory:NSApplicationSupportDirectory inDomains:NSUserDomainMask] objectAtIndex:0];
NSURL *arrayURL = [documentsURL URLByAppendingPathComponent:[filePath lastPathComponent]];
[array writeToURL:arrayURL atomically:NO];
I want to create a plist file like this:
in code, and then it will be in the Caches folder.
I already know how to fetch the data.
You can do it like this:
//Create a Mutant Dictionary
NSMutableDictionary *theMutantDict = [[NSMutableDictionary alloc] init];
//Fill it with data
[theMutantDict setObject:#"John" forKey:#"Name"];
[theMutantDict setObject:#"Doe" forKey:#"Lastname"];
//Then search for cache dir
NSString *libraryDir = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory,
NSUserDomainMask, YES) objectAtIndex:0];
NSString *cacheDir = [libraryDir stringByAppendingPathComponent:#"Caches"];
//Then write the file
NSString *filePath = [cacheDir stringByAppendingString:#"/TheFile.plist"];
[theMutantDict writeToFile:filePath atomically:YES];
Just use the writeToFile-method of NSArray to store the array in a plist and arrayWithContentsOfFile to load it.
[self.array writeToFile:path atomically:YES];
self.array = [[NSArray arrayWithContentsOfFile:path];
// or in case you need to add/remove objects (NSMutableArray):
self.array = [[[NSArray arrayWithContentsOfFile:path] mutableCopy] autorelease];
If you got your data stored in an NSArray it's as easy as this:
// filling array with data ...
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *cachePath = [paths objectAtIndex:0];
NSString *plistPath = [cachePath stringByAppendingPathComponent:#"my_nsarray_data.plist"];
[klasserArray writeToFile:plistPath atomically:YES];
// other stuff ...
So I am saving 3 NSStrings from 3 UITextFields to a property list. This works fine, but everytime I save something new, the app overwrites the data that was saved before. So basically there is only 1 Dictionary used, but i want the app to create a new dictionary everytime i save something new, so that no data gets deleted. I have no Idea how i could do this, so please help me!! :)
Code:
NSMutableArray *array = [NSMutableArray arrayWithCapacity:3];
NSArray *keys = [NSArray arrayWithObjects:#"1",#"2",#"3", nil];
[array addObject:[NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects:[NSString stringWithFormat:#"%#",lab.text],[NSString stringWithFormat:#"%#",lab1.text],[NSString stringWithFormat:#"%#",lab2.text], nil] forKeys:keys]];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"data.plist"];
[array writeToFile:path atomically:YES];
Use a NSMutableArray to which you add each new dictionary object and then write that array to data.plist.
Is there any reason why you alloc the array with capacity? I would just use [[NSMutableArray alloc] init], then add your objects.
Also, I had trouble saving NSMutableDictionaries in the NSUserDefaults, so what I ended up doing was just saving the dictionary to a file with
[dict writeToFile:filePath atomically:NO];
and initWithContentsOfFile or initWithContentsOfURL depending if I wanted to load a local or Internet file.
I should add, you can writeToFile, initWithContentsOf* for NSMutableArray as well.
Ok I've got it:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"data.plist"];
NSLog(#"path='%#'",path);
NSFileManager *nfm = [[NSFileManager alloc] init];
if([nfm fileExistsAtPath:path])
{
// if file exists, get its contents, add more entries and write back
NSMutableArray *array = [[NSMutableArray alloc] initWithContentsOfFile:path];
NSArray *keys = [NSArray arrayWithObjects:#"4",#"5",#"6",nil];
[array addObject:[NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects:[NSString stringWithFormat:#"%#",lab.text],[NSString stringWithFormat:#"%#",lab1.text],[NSString stringWithFormat:#"%#",lab2.text], nil] forKeys:keys]];
NSLog(#"modified array=%#",array);
BOOL ok = [array writeToFile:path atomically:YES];
if(!ok){
NSLog(#"Unable to write appended file");
return;
}
} else {
// if file doesn't exist, create a new one
NSMutableArray *array = [[NSMutableArray alloc] init];
NSArray *keys = [NSArray arrayWithObjects:#"1",#"2",#"3",nil];
[array addObject:[NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects:[NSString stringWithFormat:#"%#",lab.text],[NSString stringWithFormat:#"%#",lab1.text],[NSString stringWithFormat:#"%#",lab2.text], nil] forKeys:keys]];
NSLog(#"new array=%#",array);
BOOL ok = [array writeToFile:path atomically:YES];
if(!ok){
NSLog(#"Unable to write new file");
return;
}
}