Waiting in iOS UI Automation for the web view to be prepared and displayed

Question

Waiting in iOS UI Automation for the web view to be prepared and displayed

In my quest to develop an iOS UI Automation javascript with Instruments for automating the process of taking a screenshot in my iOS app, I have turned to the handy tool known as Snapshot.

A crucial part of my app involves a webview, and I am keen on capturing a fully rendered screenshot of this webview before progressing with the script. The current script I have looks like this:

var target = UIATarget.localTarget();
target.frontMostApp().mainWindow().scrollViews()[0].webViews()[0].links()[0].tap();
// take screen shot here
target.frontMostApp().navigationBar().leftButton().tap();

However, when the screenshot is captured, the webview is not fully loaded, resulting in an empty screen and a return to the main screen. Is there a method to ensure that the webview is fully loaded before taking the screenshot and continuing with the rest of the script?

javascript ios webview ui-automation ios-ui-automation

Answer 1

Answer №1

If you're using the Illuminator framework (just so you know, I'm the creator), you've got access to a nifty little function called waitForChildExistence() located in its Extensions.js. This function allows you to continuously monitor a particular element until it pops up on your screen.

To give you an idea of how it works, let's say you want to wait for a webview to finish loading within 10 seconds. You'd write something like this:

var webView = target.frontMostApp().mainWindow().scrollViews()[0].webViews()[0];
webView.tap();

webView.waitForChildExistence(10, true, "a specific link in the web view", function(wb) {
    // the argument wb will hold a reference to our webView variable
    return wb.links()["the link you are waiting for"];
});

// take a screenshot at this point
target.frontMostApp().navigationBar().leftButton().tap();

Answer 2

If you're using the Illuminator framework (just so you know, I'm the creator), you've got access to a nifty little function called waitForChildExistence() located in its Extensions.js. This function allows you to continuously monitor a particular element until it pops up on your screen.

To give you an idea of how it works, let's say you want to wait for a webview to finish loading within 10 seconds. You'd write something like this:

var webView = target.frontMostApp().mainWindow().scrollViews()[0].webViews()[0];
webView.tap();

webView.waitForChildExistence(10, true, "a specific link in the web view", function(wb) {
    // the argument wb will hold a reference to our webView variable
    return wb.links()["the link you are waiting for"];
});

// take a screenshot at this point
target.frontMostApp().navigationBar().leftButton().tap();

Answer 3

Answer №2

If you want to retrieve computed style, you can add a dummy style property (like 'clip'), use intervals of 1 second to check, and create a CSS class in external files for better organization.

Here is a function that can help you get the computed style:

function getStyle (el, prop) {
    try {
        if (getComputedStyle !== undefined) {
            return getComputedStyle(el, null).getPropertyValue(prop);
        }
        else {
            return el.currentStyle[prop];
        }
    } catch (e) {
        return el.currentStyle[prop];
    }
}

For creating a timer, you can refer to this link.

Keep in mind that computed styles may differ across different browsers.

I hope this information is helpful to you...

Answer 4

If you want to retrieve computed style, you can add a dummy style property (like 'clip'), use intervals of 1 second to check, and create a CSS class in external files for better organization.

Here is a function that can help you get the computed style:

function getStyle (el, prop) {
    try {
        if (getComputedStyle !== undefined) {
            return getComputedStyle(el, null).getPropertyValue(prop);
        }
        else {
            return el.currentStyle[prop];
        }
    } catch (e) {
        return el.currentStyle[prop];
    }
}

For creating a timer, you can refer to this link.

Keep in mind that computed styles may differ across different browsers.

I hope this information is helpful to you...

Waiting in iOS UI Automation for the web view to be prepared and displayed

Answer №1

Answer №2

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