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Question

Error "Web lock from a thread other than main"

Getting this error

"0x5085ca0: Tried to obtain the web lock from a thread other than the main thread or web thread. This may be a result of calling to UIKit from a secondary thread. Crashing now…"

All code is in app.js , I open a popup style window from app.js and display the result from a xhr web call in the popup.

This was stable in beta builds prior to GA release.

Anyone have any ideas?

I am not aware that I have tried to instantiate a call on any other threads by code.

Answer 1

Please paste a link to reproducible example and we can look at it. Thanks.

Answer 2

I had the same issue but not using popups. It was a webview on a new window.

What I did to get around this issue is to create the webview everytime there is new data to display

var win = Ti.UI.currentWindow;

var prevView = null;

function generateReport() {
    if (prevView != null) {
        win.remove(prevView);
    }

    var http = Ti.Network.createHTTPClient();
    http.setTimeout = 20000;

    http.onload = function() {
        var wvReport = Ti.UI.createWebView({
            html: this.responseText
        });

        prevView = wvReport;
        win.add(wvReport);
    };

    http.onerror = function(e) {
        alert('Error: '+e.error);
    };

    http.open('POST', 'somewhere.php');
    http.send();    
}

var btnRefresh = Ti.UI.createButton({
    systemButton: Ti.UI.iPhone.SystemButton.REFRESH
});

btnRefresh.addEventListener('click', function() {
    generateReport();
});

win.rightNavButton = btnRefresh;

generateReport();

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Error "Web lock from a thread other than main"

2 Answers