- (void) viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
NSString *path = [[NSBundle mainBundle] pathForResource:@"About" ofType: @"pdf"];
NSLog(@"%@", path);
NSURL *targetURL = [NSURL fileURLWithPath:path];
NSURLRequest *request = [NSURLRequest requestWithURL:targetURL];
[_webView loadRequest:request];
}