i am written app for my iphone and i want to save some NSmutablearray to file
and load it later. i read about NSArchiver but didnt understand how to work with
my calss is :
#interface Shop : NSObject
{
NSString *m_Name;
NSString *m_Description;
NSString *m_Category;
NSString *m_BestSaleDesc;
NSString *m_AdditionalInfo;
NSInteger m_ShopId;
NSInteger m_ChainId;
NSMutableArray *m_SalesList;
NSData *m_Icon;
bool m_Filtered;
bool m_Deleted;
bool m_Hidden;
}
can someone give me example code of how to save an NSmutableArray of calss Shop to file name ShopFile.sav and then how to load it again to NSmutableArray object.
thanks so much
EDIT: Redid the entire thing.
Saving:
NSMutableDictionary *saveDict = [NSMutableDictionary dictionary];
[saveDict setValue:m_Name forKey:#"m_Name"];
[saveDict setValue:m_Description forKey:#"m_Description"];
[saveDict setValue:m_Category forKey:#"m_Category"];
[saveDict setValue:m_BestSaleDesc forKey:#"m_BestSaleDesc"];
[saveDict setValue:m_AdditionalInfo forKey:#"m_AdditionalInfo"];
[saveDict setValue:[NSNumber numberWithInt:m_ShopId] forKey:#"m_ShopId"];
[saveDict setValue:[NSNumber numberWithInt:m_ChainId] forKey:#"m_ChainId"];
[saveDict setValue:m_SalesList forKey:#"m_SalesList"];
[saveDict setValue:m_Icon forKey:#"m_Icon"];
[saveDict setValue:[NSNumber numberWithBool:m_Filtered] forKey:#"m_Filtered"];
[saveDict setValue:[NSNumber numberWithBool:m_Deleted] forKey:#"m_Deleted"];
[saveDict setValue:[NSNumber numberWithBool:m_Hidden] forKey:#"m_Hidden"];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingString:#"/ShopFile.sav"];
[saveDict writeToFile:filePath atomically:YES];
Loading:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingString:#"/ShopFile.sav"];
NSDictionary *loadDict = [NSDictionary dictionaryWithContentsOfFile:filePath];
m_Name = [loadDict valueForKey:#"m_Name"];
m_Description = [loadDict valueForKey:#"m_Description"];
m_Category = [loadDict valueForKey:#"m_Category"];
m_BestSaleDesc = [loadDict valueForKey:#"m_BestSaleDesc"];
m_AdditionalInfo = [loadDict valueForKey:#"m_AdditionalInfo"];
m_ShopId = [[loadDict valueForKey:#"m_ShopId"] intValue];
m_ChainID = [[loadDict valueForKey:#"m_ChainId"] intValue];
m_SalesList = [loadDict valueForKey:#"m_SalesList"];
m_Icon = [loadDict valueForKey:#"m_Icon"];
m_Filtered = [[loadDict valueForKey:#"m_Filtered"] boolValue];
m_Deleted = [[loadDict valueForKey:#"m_Deleted"] boolValue];
m_Hidden = [[loadDict valueForKey:#"m_Hidden"] boolValue];
Should work better ;)
Why not use Core Data? Core Data
Related
-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
image=[info objectForKey:UIImagePickerControllerOriginalImage];
[self.images addObject:image];
[self.maintable reloadData];
[self dismissViewControllerAnimated:YES completion:NULL];
}
-(IBAction)savebutton:(id)sender{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory ,
NSUserDomainMask , YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString* path = [documentsDirectory stringByAppendingPathComponent:
[NSString stringWithFormat: #"MyImages"]];
for (int i=0; i<_images.count; i++) {
image=[_images objectAtIndex:i];
NSData* data = UIImagePNGRepresentation(image);
[data writeToFile:path atomically:YES];
NSLog(#"saved");
}
}
- (UIImage*)loadImage
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);`
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString* path = [documentsDirectory stringByAppendingPathComponent:
[NSString stringWithFormat: #"MyImage.png"] ];
image = [UIImage imageWithContentsOfFile:path];
if(image != nil){
[self.images addObject:image];
}
return image;
}
You are on correct track,
On save button action, save images document directory's particular path and save image name in one array which you need to save in core data or preference whatever you preferred in your app
like this..
NSString *strImageName = #"image.png"
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
NSString *filePath = [documentsPath stringByAppendingPathComponent: strImageName];
// Above you can give your custom path like #"App_Name/imageName" for unique identification
[pngData writeToFile:filePath atomically:YES];
[arrCoreData addObject: strImageName];
Once you have done(saved all your images then save image name in preference)
like this
NSData *data = [NSKeyedArchiver archivedDataWithRootObject: arrCoreData];
[[NSUserDefaults standardUserDefaults] setObject:data forKey:#"MyImageArray"];
When you want to fetch images and display it again,
You may follow this flow:
NSData *mainCatData = [[NSUserDefaults standardUserDefaults] objectForKey:#"MyImageArray"];
arrCoreData = [NSKeyedUnarchiver unarchiveObjectWithData:mainCatData];
Then using these images name you may fetch images back and display as you want..
To load image from document directory, You may use this function
- (UIImage*)loadImage:(NSString)strImageName{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString* path = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithString: #"AppName/%#", strImageName] ];
UIImage* image = [UIImage imageWithContentsOfFile:path];
return image;
}
Hope it will help you :)
I did it and worked on my app:)
- (void)loadImage
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSArray *fileArray = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:documentsDirectory error:nil];
for (int i=0; i<fileArray.count; i++) {
NSString* path = [documentsDirectory stringByAppendingPathComponent:fileArray[i]];
image = [UIImage imageWithContentsOfFile:path];
[self.images addObject:image];
}
}
-(IBAction)savebutton:(id)sender{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask , YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
for (int i=0; i<_images.count; i++) {
NSString* path = [documentsDirectory stringByAppendingPathComponent:
[NSString stringWithFormat: #"MyImages%d", i]];
image=[_images objectAtIndex:i];
NSData* data = UIImagePNGRepresentation(image);
[data writeToFile:path atomically:YES];
NSLog(#"saved");
}
}
Hello I am trying to load data from a file
This function save the data to a file in documents folder
- (IBAction)saveUser:(id)sender{
NSString *name = [nameField stringValue];
NSString *weight = [weightField stringValue];
NSDate *date = [datePick dateValue];
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];
}
However when I try to load the file and get the data from it I cant, could someone tell me how this is done done.
Edit to show loadFunction
-(IBAction)loadUser:(id)sender{
NSString *weight = [weightField stringValue];
NSDate *date = [datePick dateValue];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *loadPath = [documentsDirectory stringByAppendingPathComponent:name];
NSMutableDictionary *savedData = [[NSMutableDictionary alloc] initWithContentsOfFile: name];
NSLog(#"%#", weight);
}
To fix your answer. here is a code that works, you pretty much did not give a filename.
NSString *filename = [documentsDirectory stringByAppendingPathComponent:#"file.txt"];
And in your line where you write the file :
[dict writeToFile:name atomically:YES];
you must change name to filename, like this
[dict writeToFile:filename atomically:YES];
And in your load data method :
NSString *filename = [documentsDirectory stringByAppendingPathComponent:#"file.txt"];
NSMutableDictionary *savedData = [[NSMutableDictionary alloc] initWithContentsOfFile:filename];
NSLog(#"The weight is : %#", [savedData valueForKey:#"weight"]);
The following seems to do what you intend (minus the UI element dependencies in your code):
#import <Foundation/Foundation.h>
static NSString *pathToDocuments(void) {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
return [paths objectAtIndex:0];
}
int main(int argc, char *argv[]) {
NSAutoreleasePool *p = [[NSAutoreleasePool alloc] init];
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
[dict setValue:#"SomeName" forKey:#"name"];
[dict setValue:#"SomeWeight" forKey:#"weight"];
[dict setValue:[NSDate date] forKey:#"date"];
NSString *filePath = [pathToDocuments() stringByAppendingPathComponent:[dict objectForKey:#"name"]];
[dict writeToFile:filePath atomically:YES];
[dict release]; dict = nil;
NSLog(#"%s - Confirming dict is nil: %#",__FUNCTION__,dict);
dict = [[NSDictionary dictionaryWithContentsOfFile:filePath] mutableCopy];
NSLog(#"%s - weight = %#",__FUNCTION__,[dict objectForKey:#"weight"] );
[p release];
}
This prints the following to the console:
2012-10-19 06:40:38.691 Untitled[10633:707] main - Confirming dict is nil: (null)
2012-10-19 06:40:38.693 Untitled[10633:707] main - weight = SomeWeight
EDIT:
That said, I think the problem may be the file path in loadUser...
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;
}
This gives me...
NSString *filename2 = [NSString stringWithFormat:#"/newFile.json"];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *getImagePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:#"%#", filename2]];
[self.restClient loadFile:filename2 intoPath:getImagePath];
NSString *fileContent = [[NSString alloc] initWithContentsOfFile:getImagePath];
SBJsonParser *parser = [[SBJsonParser alloc] init];
NSDictionary *data = (NSDictionary *) [parser objectWithString:fileContent error:nil];
...this error:
File loaded into path: (null)
...but why?? this code was under view did load. the file is in dropbox, so what is the problem
Please tell me why isEqualToString not work ?
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"Info.plist"];
NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:path];
value =[dict objectForKey:#"LANGUAGE"];
if ([value isEqualToString:#"english"])
{
NSLog(#"thx");
}
6,
try using [dict valueForKey:#"LANGUAGE"]; instead of [dict objectForKey:#"LANGUAGE"]; return type are different.