Subclassing UIView

When subclassing an UIView and you need to create a method for initialization, then you must choose at least one of the following.

• initWithFrame. This is the default initializator. Implement it when your class is created from code.
• initWithCoder. Implement this method when your UIView subclass will be created by the Interface Builder.
• layerClass. Implement this when the view will be draw by an alternative method like OpenGL ES.

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