Check if iOS device's internet connection is actually working [duplicate] - ios

Question

This question already has an answer here:
Determine whether iPhone is really connected to the internet or just behind a restricted hotspot
(1 answer)
Closed 7 years ago.
There are loads of questions on here about finding an active internet connection in an app, but none work if you are on a 3g connection and you have no data credit, or if you are on a WiFi network at a hotel that automatically redirects to a log in page and you have yet to enter the password. That kind of situation.
What is the fastest way to check if the internet connection is actually operational?

Answer 1

You can use AFNetworkReachabilityManager class in AFNetworking.
https://github.com/AFNetworking/AFNetworking
above link will help you out in setting things. This will provide you with continuous network check as per your requirement. Here is few line of code:
[[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
NSLog(#"Reachability: %#", AFStringFromNetworkReachabilityStatus(status));
}];
[[AFNetworkReachabilityManager sharedManager] startMonitoring];

Answer 2

The best way to accomplish this, not using Reachability or any other API, is by creating a NSURL and to try to receive data from it. For the bad connection I added a timeout of 20sec.
Like:
- (void)checkConnection //Run this on a side queue, never on a main queue
{ NSURL *checkURL = [NSURL URLWithString:#"http://www.apple.com"];
NSURLRequest *lRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:checkURL]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:20.0];
NSData *data = [NSData dataWithContentsOfURL:lRequest];
if (data)
{
connected = YES;
}
else
{
connected = NO;
}
}
That would check if a specific website is reachable and set a timeout which indicates a slow network connection.
This code could have errors, as I haven't used/tried it yet! Comment this answer if there are any.