Using Parse.com to load UIWebView from UITableView Cell Selection - ios

Question

I have created an "events table", which features the event name, the date and location. Upon clicking each event cell, I am trying to load a specific event URL into a web view. Completely lost.
I have integrated a "prepareForSegue" in the ViewController.m, and have successfully loaded a single url into each table cell that is defined within the code, but I cannot seem to load a string of URLs from Parse.com. The rest of the event table data is loaded fine from Parse.. i'm just struggling with the URL.
Can anybody help?
This is what I have for the individual url load:
-(void)loadRequestFromString:(NSString*)urlString
{
NSURL *url = [NSURL URLWithString:urlString];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
[self.eventWebView loadRequest:urlRequest];
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = event.name;
[self loadRequestFromString:#"http://www.airleague.co.uk"];
}
- (void)viewDidUnload
{
[self setEventWebView:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation: (UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#end
My segue is:
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"showEventDetail"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
EventDetailViewController *destViewController = segue.destinationViewController;
PFObject *object = [self.objects objectAtIndex:indexPath.row];
Event *event = [[Event alloc] init];
event.name = [object objectForKey:#"name"];
event.eventURL = [object objectForKey:#"eventURL"];
destViewController.event = event;
}
}
#end

Answer 1

for:
[self loadRequestFromString:NSString];
to work, the url should have #"http://" (or any protocol) in the url.
For example it must be "http://google.com" and NOT "google.com"
Does you urls in Parse.com have the protocol in the string?

Answer 2

First you have to retrieve your objects, which are stored as a string:
So in your viewDidLoad you perform the following query like this:
PFQuery *urlQuery = [PFQuery queryWithClassName:#"WebViewURLs"];
urlQuery.cachedPolicy = whateverPolicyYouWant;
[urlQuery selectKeys:#[#"NameOfURLColumn"]];
[urlQuery findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
self.urlArray = objects;
NSLog(#"%#", self.urlArray);
//you'll notice the NSLog logs all attributes to that array, so if you want to narrow it down to a specific column you can do something like this:
self.urlArray = [objects valueForKey:#"NameOfColumn"];
}
}];
So now you have the objects in an array and you can act accordingly. Your going to have to be more specific with your set up if you want a more specific answer. I'm just guessing at this point since i'm not a mind reader...yet :)
EDIT after taking a gander from the project you sent to me via email...
A quick synopsis for other users looking for an answer similar:
Ensure your IBOutlet connections are singular and attached to their respective owners.
Additionally the OP wasn't segueing properly, they were allocating a new subclass every time the cell was selected, but wasn't passing any information to the webView View Controller.
It's also worth to point out the OP had subclassed the tableView to Parses PFQueryTableViewController
Make sure you properly call your destination view controller and pass information to a properly set property in the Detail VCs header :
if ([segue.identifier isEqualToString:#"showDetailVC"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
DetailViewController *destViewController = segue.destinationViewController;
PFObject *object = [self.objects objectAtIndex:indexPath.row];
destViewController.eventURL = [object objectForKey:#"ingredients"];
destViewController.eventName = [object objectForKey:#"name"];
}
Detail VC Header
#property (nonatomic, strong) IBOutlet UIWebView *webView;
#property (nonatomic, strong) NSString *eventURL;
#property (nonatomic, strong) NSString *eventName;
Detail VC implementation :
//Load the webView in viewDidLoad:
[self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:self.eventURL]]];