Pakket | mx.core |
Interface | public interface IDeferredInstance |
Taalversie: | ActionScript 3.0 |
Productversie: | Flex 3 |
Runtimeversies: | Flash Player 9, AIR 1.1 |
getInstance()
method is first called, and returns a reference to that value
when the getInstance()
method is called subsequently.
The Flex compiler performs the following automatic coercions when it encounters MXML that assigns a value to a property with the IDeferredInstance type:
- If you assign a property of type IDeferredInstance a value that is
an MXML child tag representing a class, such as a component
tag, the compiler creates an IDeferredInstance implementation
whose
getInstance()
method returns an instance of the class, configured as specified in the MXML code. The following example shows this format; in this example, MyComp is a custom component that has a variable called myDeferredInstanceProperty of type IDeferredInstance. The compiler generates an IDeferredInstance1 implementation whosegetInstance()
method returns an instance of the Label class, with its text property set to "This is a deferred label":<MyComp> <myDeferredInstanceProperty> <Label text="This is a deferred label"/> </myDeferredInstanceProperty> </MyComp>
- If you assign a text string to a property of type IDeferredInstance,
the compiler interprets the string as a fully qualified class name,
and creates an
IDeferredInstance implementation whose
getInstance()
method returns a new instance of the specified class. The specified class must have a constructor with no arguments. The following example shows this format; in this example, the compiler generates an IDeferredInstance1 implementation whosegetInstance()
method returns an instance of the MyClass class:<MyComp myDeferredInstanceProperty="myPackage.MyClass/>
Use the IDeferredInstance interface when an ActionScript class defers the instantiation of a property value. You cannot use IDeferredInstance if an ActionScript class requires multiple instances of the same value. In those situations, use the IFactory interface.
The states.AddChild class includes a childFactory
property that is of type IDeferredInstance.
Meer voorbeelden
Verwante API-elementen
Openbare methoden
Methode | Gedefinieerd door | ||
---|---|---|---|
Creates an instance Object from a class or function,
if the instance does not yet exist. | IDeferredInstance |
Wed Jun 13 2018, 11:42 AM Z