How to instantiate a custom block in Magento 2

September 7, 2015 - Magento 2

Unfortunately, the process is not as easy as in Magento 1 ($crumbs = Mage::app()->getLayout->getBlock(‘breadcrumbs’);). In Magento 2, it depends on where you are going to instantiate it from. To create an instance from another block, use the following code:

$this->getLayout()->createBlock('Full\Block\Class\Name\Here');

1	$this->getLayout()->createBlock('Full\Block\Class\Name\Here');

from a controller:

$this->_view->getLayout()->createBlock('Full\Block\Class\Name\Here');

1	$this->_view->getLayout()->createBlock('Full\Block\Class\Name\Here');

from a model and a helper:

$this->_blockFactory->createBlock('Full\Block\Class\Name\Here');

1	$this->_blockFactory->createBlock('Full\Block\Class\Name\Here');

Please note that in a case of the model you have to create _blockFactory (a protected member), and inject a \Magento\Framework\View\Element\BlockFactory instance in the constructor, assigning it to the member var. For instance:

protected $_blockFactory; public function __construct( ..., \Magento\Framework\View\Element\BlockFactory $blockFactory, .... ){ .... $this->_blockFactory = $blockFactory; .... }

1	protected $_blockFactory; public function __construct( ..., \Magento\Framework\View\Element\BlockFactory $blockFactory, .... ){ .... $this->_blockFactory = $blockFactory; .... }