need to save contents of table view as txt file and the reload it later - objective-c

Question

i need to be able to save the contents of my table view which is given data by an NSMutableArray to a txt file and then need to reopen that file automatically when the window containing the table view. i am making an application for mac
thanks
this is the code for the data source:
#import "tableViewData.h"
#import "Customer.h"
#implementation tableViewData
-(id) init
{
self = [super init];
if (self) {
list = nil;
filepath = #"/Users/Gautambir/Desktop/CustomerNames.txt";
if ([[NSFileManager defaultManager]fileExistsAtPath:filepath]) {
list = [[NSMutableArray alloc] initWithContentsOfFile:filepath];
}
else
list = [[NSMutableArray alloc]initWithObjects:name,memberNumber ,nil];
[list writeToFile:filepath atomically:YES];
}
return self;
}
-(NSInteger)numberOfRowsInTableView:(NSTableView *)tableView{
return [list count];
}
-(id)tableView:(NSTableView *)tableView objectValueForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row{
Customer *Customer = [list objectAtIndex:row];
NSString *identifier = [tableColumn identifier];
return [Customer valueForKey:identifier];
}
-(void)tableView:(NSTableView *)tableView setObjectValue:(id)object forTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row{
Customer *Customer = [list objectAtIndex:row];
NSString *identifier = [tableColumn identifier];
[Customer setValue:object forKey:identifier];
}
-(void)save{
[list writeToFile:filepath atomically:YES];
}
-(IBAction)add:(id)sender{
[list addObject:[[Customer alloc]init]];
[tableView reloadData];
NSLog (#"array:%#",list);
}
-(IBAction)remove:(id)sender{
NSInteger row = [tableView selectedRow];
if (row != -1) {
[list removeObjectAtIndex:row];
}
[tableView reloadData];
}
-(void)dealloc
{
[super dealloc];
}
#end
and this is the .m file for the customer object class:
#import "Customer.h"
#implementation Customer
#synthesize name;
#synthesize memberNumber;
-(id) init
{
self = [super init];
if(self) {
name = #"Test";
int i = arc4random()%1000000000000000000;
if (i<0) {
memberNumber = i*-1;
}
else
memberNumber = i;
}
return self;
}
-(void)dealloc
{
[name release];
[super dealloc];
}
-(id)initWithCoder:(NSCoder *)aDecoder
{
self = [super init];
if (self)
{
name = [[aDecoder decodeObjectForKey:#"name"]retain];
memberNumber = [aDecoder decodeIntForKey:#"memberNumeber"];
}
return self;
}
-(void)encodeWithCoder:(NSCoder *)aCoder
{
[aCoder encodeObject:name forKey:#"name"];
[aCoder encodeInt:memberNumber forKey:#"memberNumber"];
}
#end
strong text

Answer 1

im sorry to post another answer - i misread the tags, and my first answer was relying to iOS.
this is the way to do it in OSX:
saving
NSMutableArray *array = ... //your array
[array addObject:...];
[array addObject:...];
[array addObject:...];
...
// then use an NSData to store the array
NSData *data = [NSKeyedArchiver archivedDataWithRootObject:array];
NSString *path = #"/Users/User/path...";
[data writeToFile:path options:NSDataWritingAtomic error:nil];
retrieving
NSMutableArray *archive = [NSKeyedUnarchiver unarchiveObjectWithFile:path];
sebastian