init_Method_6d6b5bd.md

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init() Method

The init() method can be used to set up, for example, internal variables or subcontrols of a composite control.

If the init() method is implemented, OpenUI5 invokes the method for each control instance directly after the constructor method.

Note:

Values that are given in the constructor method are not yet available in the init method. This is to prevent that a control only works when the values are set initially, but not when the values are changed.

The init method is considered a private method that must only be called by the OpenUI5 core.

   init: function() {

      this._bSearchHasBeenTriggered = false;

      this._oSearchButton = new sap.m.Button(this.getId() + "-searchBtn", {text: "Search"});

   }

Note:

Any method in your inheriting control overrides methods with the same name in the superclass. If, for example, your control implements the init() method, the init() of the superclass will no longer be executed. The control is then no longer properly initialized and this typically causes an error. To avoid breaking the control, call the superclass method.

Consider also that the superclass might implement the method later on, or removes its own method implementation because it is not needed anymore. We recommend that you check for the existence of the superclass method before calling it:

SomeControl.extend("my.OwnControl", {
       ...
       init: function() {
             if (SomeControl.prototype.init) { // check whether superclass implements the method
                    SomeControl.prototype.init.apply(this, arguments); // call the method with the original arguments
             }

             //... do any further initialization of your subclass, e.g. 
             this.$().on("click", this.handleClick);
       } 
       ...
}