objective-c cannot read from property list - ios

Question

self.toDoItems = [[NSMutableArray alloc] init]; //initialize array
self.dataFileName = #"PropertyList";
self.filePath = [self.dataFileName stringByAppendingString:#".plist"];
self.rootPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES) objectAtIndex:0];
self.filePath = [self.rootPath stringByAppendingPathComponent:self.filePath];
self.NSSRootNodeName = #"ToDoList"; //name of the root node in the property list
// if (![[NSFileManager defaultManager] fileExistsAtPath: self.filePath]) {
// self.filePath = [[NSBundle mainBundle] pathForResource:self.dataFileName ofType:#"plist"];
// }
NSLog(#"File path: %#", self.filePath);
// Uncomment the following line to preserve selection between presentations.
self.clearsSelectionOnViewWillAppear = NO;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
self.navigationItem.rightBarButtonItem = self.editButtonItem;
//read xml file and load to array
NSString *errorDesc = nil;
NSPropertyListFormat format;
NSData *plistXML = [[NSFileManager defaultManager] contentsAtPath:self.filePath];
if (plistXML==nil) {
NSLog(#"Error reading plistXML");
}
NSDictionary *rootDictionary = (NSDictionary *)[NSPropertyListSerialization
propertyListFromData:plistXML
mutabilityOption:NSPropertyListMutableContainersAndLeaves
format:&format
errorDescription:&errorDesc];
if (!rootDictionary) {
NSLog(#"Error reading plist: %#, format: %d", errorDesc, format);
}
the output is below. I am not sure why I get these errors below:
My PropertyList.plist is sitting in my Documents folder inside my application.
could someone point out what I am doing wrong.
File path: /Users/Computer/Library/Application Support/iPhone Simulator/7.1/Applications/78B5F9BA-8376-4001-ACA0-936D9B4D6342/Documents/PropertyList.plist
Error reading plistXML
Error reading plist: stream had too few bytes, format: 0

Answer 1

FWIW, here is what worked for me:
NSFileManager *fileManager = [[NSFileManager alloc] init];
if ([fileManager fileExistsAtPath: [self filePathForState]])
{
printf("found state file\n");
NSData *data = [NSData dataWithContentsOfFile:[self filePathForState]];
...
}
else
{
printf("no state file found\n");
}
[fileManager release];
- (NSString *) filePathForState
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *result = [documentsDirectory stringByAppendingPathComponent: #"circles06"];
printf("filePathForState: %s\n", [result UTF8String]);
return result;
}
- (void) saveState
{
NSData *state = [model stateData];
[state writeToFile: [self filePathForState] atomically: NO];
}