How to use Sencha Touch to automatically target a textfield on iOS programmatically?

My goal is to implement a pin login feature similar to the ones found on iOS and Android platforms, where users are required to enter a 4-digit pin to proceed. The issue I'm facing is that I want the input field to be automatically selected and the number pad to be displayed as soon as the user accesses the page, allowing them to quickly enter their password.

I referred to the documentation which states that the textfield is focusable , but some users have reported problems with this functionality.

I am using Sencha CMD to compile my code and convert it into a Native App. While the focus feature works well on Android devices, it seems to be malfunctioning on iOS devices.

Below is a basic proof of concept:

Ext.application({
name : ('SF' || 'SenchaFiddle'),

launch : function() {
    Ext.create('Ext.Panel', {
        fullscreen : true,
        items:[
            {
                xtype: 'textfield',
                id: 'textfieldId'
            }, {
                xtype: 'button',
                text: 'click me to focus',
                handler: function () {
                    this.parent.down('#textfieldId').focus();
                }
            }
        ]
    });
}
});

Answer №1

Since iOS 6, web views on iOS have been deliberately programmed to prevent text field autofocus by default. This decision was made because focusing on a text field also brings up the keyboard, which can potentially disrupt the user experience. For more information, refer to Apple's official documentation. This behavior applies not only to Safari but also to web views within native applications.

If you are developing a native application, it is possible to override this default setting. For instance, if you are utilizing Cordova or PhoneGap, you can modify this setting in your project's

MainViewController::webViewDidFinishLoad
method:

- (void)webViewDidFinishLoad:(UIWebView*)theWebView
{
    // Allow the keyboard to appear with Javascript focus events...
    theWebView.keyboardDisplayRequiresUserAction = false;

    return [super webViewDidFinishLoad:theWebView];
}

There have been numerous discussions on Stack Overflow regarding this issue:

  • Mobile Safari Autofocus text field
  • Set textbox focus in mobile safari

Answer №2

In my current project with Touch 2.4, I managed to focus the field in the browser by implementing the following code:

xtype: 'textfield',
label: 'Test Example',
name: 'testField',
listeners: [
    {
        fn: function(element, eOpts) {
            element.down('input').dom.focus();
        },
        event: 'painted'
    }
]

I am curious to see how this functionality will work once deployed on a device.

Answer №3

Give this a shot...the input box will display with a focus for entering numbers.

<tpl  if="ItemKey==this.getChecked(values.ItemKey)">
                       <input  style="color:green;display:block;width:50px;text-align:center;" type="text"
                       id="{ItemKey}"
                       onkeyup="MyApp.app.getController(\'Control\').TextboxKeyUp(this)"
                       value={[this.getScore(values.ItemKey)]}
                        onfocus="MyApp.app.getController(\'Control\').patTextFocus(this)" ><tpl else>

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