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Functions are called in,, and phases. It is an important method to check attribute changes and optimize performance. The following figure excerpts some codes for handling event binding. The method has a value pointing to the last attribute, which is the current attribute value. Here is the event handling function that we bind to the component. If the binding event that is not used for air conditioning is empty, the event binding is logged off.人说九死一生，他们父子是十死，没有生。Users can safely request proxies. They only care about whether they can get the desired results. If we don't need a proxy object, we can directly change it into an ontology object to call the method.《挑战不可能》是中央电视台举全台之力重磅推出的超大型项目，将于2015年8月2日起，在CCTV-1每周日晚间黄金时段20:00-21:30首播，连续播出10周。If we need to do something later, we also need to write the called method in it. In this way, the code is highly coupled, so we now use the publish-subscribe mode to see how to refactor the above business requirements code.