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;
}
}
Related
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];
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 have a UITableView populated by a feed from searchtwitter.com. I also have a details table with an image and UILabel. I have all this working, but I want to add a UIButton on the detail page that will save the UIImage and the label into a property list. I'm very new to this; here is what I have so far (not working).
- (IBAction)SaveFriend:(id)sender
{
NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentDirectory = [path objectAtIndex:0];
NSString *plistPath = [documentDirectory stringByAppendingPathComponent:#"TwitterFriends.plist"];
NSDictionary * tweet = [[NSDictionary alloc]init];
NSString *text = [tweet objectForKey:#"from_user"];
NSString *user = [tweet objectForKey:#"from_user_name"];
personName.text = text;
personInfo.text = user;
// create dictionary with values in UITextFields
NSDictionary *plistDict = [NSDictionary dictionaryWithObjects: [NSArray arrayWithObjects: personName, personInfo, nil] forKeys:[NSArray arrayWithObjects: #"Name", #"info", nil]];
NSString *error = nil;
// create NSData from dictionary
NSData *plistData = [NSPropertyListSerialization dataFromPropertyList:plistDict format:NSPropertyListXMLFormat_v1_0 errorDescription:&error];
// check is plistData exists
if(plistData)
{
// write plistData to our Data.plist file
[tweet writeToFile:plistPath atomically:YES];
}
else
{
NSLog(#"Error in saveData: %#", error);
[error release];
}
}
Instead of using a .plist, try using an NSArray or NSMutableArray and then the writeToFile method. For example:
NSMutableArray *temp = [NSMutableArray new];
[temp addObject:image];
[temp addObject:label];
[temp writeToFile:[self saveFilePath:#"filename"] atomically:YES];
//Returns the saved information path
- (NSString*) saveFilePath: (NSString *) add
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *path = [paths objectAtIndex:0];
NSString *filename = [path stringByAppendingPathComponent:add];
return filename;
}
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 ...
I have a plist with the following architecture/structure:
dictionary
key1
item1
key2
item2
key3
item3
dictionary
...
and i want to load item (item1) for the first key (key1) of every dictionary to an NSArray, so that i can load the nsarray into a UITableView.
i cam to this point:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"data.plist"];
NSMutableArray *array = [[NSMutableArray alloc] initWithContentsOfFile:path];
and then i wanted to add something like this:
tablearray = [array objectsForKey:#"key1"];
but that doesn't exist as command. Seems like i need some help there... :)
You can loop over the Array and add the Objekts that way:
NSMutableArray *tablearray = [NSMutableArray arrayWithCapacity:[array count]];
for (NSDictionary *dict in array) {
[tablearray addObject:[dict objectForKey:#"key1"]];
}
Apple provides pList programming guide which describes how to read from a pList and also writes into it. You can go throug it.
We will get the data from the pList as NSData and convert it into NSDictionary, by using the following method,
NSData *plistXML = [[NSFileManager defaultManager] contentsAtPath:plistPath];
NSDictionary *temp = (NSDictionary *)[NSPropertyListSerialization
propertyListFromData:plistXML
mutabilityOption:NSPropertyListMutableContainersAndLeaves
format:&format
errorDescription:&errorDesc];
you can add the response dictionary intro an array using the
NSMutableArray * myArray = [NSMutableArray alloc] init];
//temp is the response dictionary
NSArray * myKeys = [temp allKeys];
for (int index = 0; index<[myKeys count]; index++) {
id value = [temp valueForKey:[myKeys objectAtIndex:index]];
[myArray addObject:value];
}
use the myArray now.
I think this is what you needed.