Connection Error Occurs When Browsing Too Fast

Question

In the app that I'm writing, I check to see if the device has an internet connection. I put a connection error image over the screen, and hide it unless the device is not connected. There is an odd issue though. I implemented a simple back button for the UIWebView, but when I press it too fast, the connection error occurs. Here is the code I use to check for connection, and decide whether to display the error:

-(void)webView:(UIWebView *)myWebView didFailLoadWithError:(NSError *)error {

    _connectionError.hidden = NO;
}

So, I think the only way to solve this issue would be to have it check if there is a connection one time, only when the app first launches, and never run again for the remainder of the time. I'm extremely new to Objective-C, and have no idea how to do this. I'm thinking that I should put something in viewDidLoad, or implement some way to have the method run only once, but I have no idea how to do that.

Here's the code for the back button:

- (IBAction)backButtonTapped:(id)sender {
    [_viewWeb goBack];
}

How do you implement the back button? Can you post your code? — Valent Richie, May 29 '13 at 01:23
This might be related: http://stackoverflow.com/questions/9235485/reusing-uiwebview-is-causing-crashes and try to set [_viewWeb stopLoading]; before calling the goBack method. — Valent Richie, May 29 '13 at 01:36
@verbumdei Setting `[_viewWeb stopLoading];` before calling the goBack method did it buddy, thanks a lot! Could you post that as an answer so that I can throw you some points? — Henry F, May 29 '13 at 01:52

score 1 · Answer 1 · edited May 23 '17 at 12:18

1

To check for a connection you can use Reachability in your project. You can then use this answer to see how to use it. This would be more efficient and cleaner than using a UIWebview.

edited May 23 '17 at 12:18

Community

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answered May 29 '13 at 01:02

jfuellert

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Thanks for the answer. It appears that Reachability uses push notifications though to display the message, is this correct? – Henry F May 29 '13 at 01:24
It doesn't have to. You can check `if(([[Reachability reachabilityForInternetConnection] currentReachabilityStatus] == NotReachable))` for example, to check if there is an internet connection available. This can be checked from anywhere after importing `Reachability.h`. – jfuellert May 29 '13 at 01:29
@Oral B I should add that you can try using this method before trying to actually load a web page; doing so could save you some hassle – jfuellert May 29 '13 at 01:47

score 1 · Accepted Answer · answered May 29 '13 at 01:57

1

Call the method stopLoading on the webView before the goBack method to make sure there is no multiple request going which can cause the connection error:

- (IBAction)backButtonTapped:(id)sender {
    [_viewWeb stopLoading];
    [_viewWeb goBack];
}

answered May 29 '13 at 01:57

Valent Richie

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Connection Error Occurs When Browsing Too Fast

2 Answers2