How to display a image when there is no internet connection (web view) - xcode

Question

I have a web view based program I was just testing. How do you display a image when there is no internet connection?
I have a basic webview
//
// XYZViewController.m
// Phantomore
//
// Created by Kevin Jin on 5/15/14.
// Copyright (c) 2014 Kevin Jin. All rights reserved.
//
#import "XYZViewController.h"
#interface XYZViewController ()
#end
#implementation XYZViewController
- (void)viewDidLoad
{
[super viewDidLoad];
NSString *fullURL = #"http://www.phantomore.com";
NSURL *url = [NSURL URLWithString:fullURL];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
[_viewWeb loadRequest:requestObj];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (BOOL)prefersStatusBarHidden
{
return YES;
}
#end
Thats it,I just want to know what I have to do to have it displaying a image when tehre is no internet connection

Answer 1

I just simplified mamnun answer(Get Reachability here).
You can use this method after you have implemented the reachability class
- (BOOL)isConnectedToInternet
{
Reachability *reachability = [Reachability reachabilityForInternetConnection];
NetworkStatus networkStatus = [reachability currentReachabilityStatus];
return !(networkStatus == NotReachable);
}
In any of your class
- (void)viewDidLoad
{
[super viewDidLoad];
if([self isConnectedToInternet]){
//Hide your imageview
NSString *fullURL = #"http://www.phantomore.com";
NSURL *url = [NSURL URLWithString:fullURL];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
[_viewWeb loadRequest:requestObj];
}
else{
// Hide your webview
// Show your imageview
// Do not forget to import reachability class on top
}
}

Answer 2

There is two way of doing it.
Before even performing the url request, check if internet connection is available. Use Apple provided Reachability classes or better yet use the open-source version. If internet is available load the request. If not add an UIImageView with your preferred UIImage as a subview of the webview. You can do something like this:
//inside #interface
#property(nonatomic, strong) UIImageView *imageView;
//inside -(void)viewDidLoad
self.imageView = [UIImageView alloc] initWithImage:[UIImage imageNamed:#"as.as"];
Reachability* reach = [Reachability reachabilityWithHostname:#"www.google.com"];
reach.reachableBlock = ^(Reachability*reach) {
// load request
NSString *fullURL = #"http://www.phantomore.com";
NSURL *url = [NSURL URLWithString:fullURL];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
[_viewWeb loadRequest:requestObj];
};
reach.unreachableBlock = ^(Reachability*reach) {
//show imageview
[_viewWeb addSubView:self.imageView];
};
[reach startNotifier];
Implement UIWebView delegate. In the – webView:didFailLoadWithError: method, check the error. If the error is caused by no internet connection, add the imageview(same as before).