Question

[array writeToFile:[documentsDirectory stringByAppendingPathComponent:@"data.plist" atomically:YES];

this line gives error that method -stringByAppendingPathComponent not found. whats the issue

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSArray *array = [[NSArray alloc]initWithObjects:@"First", @"Second", @"Third", nil];
[array writeToFile:[documentsDirectory stringByAppendingPathComponent:@"data.plist" atomically:YES]];

Answer 1

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 

NSString *documentsDirectory = [paths objectAtIndex:0]; 

plistpath = [[NSString alloc] initWithString:[documentsDirectory stringByAppendingPathComponent:@"Product.plist"]];

And then

[array writeToFile:path atomically:YES]; 

[Whatever [Array or Dictionary] you want to Write in Plist]

If it is still not creating the plist then check whether your array or dictionary must be empty.