Objective-C save and load files - objective-c

Question

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);
}

Answer 1

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"]);

Answer 2

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...