hide the property declarations a class extension

1.Outlets may be considered private to the defining class; if you prefer, you can hide the property declarations a class extension. For example:

// MyClass.h

@interface MyClass : MySuperclass

@end

// MyClass.m

@interface MyClass ()

@property (weak) IBOutlet MyView *viewContainerSubview;

@property (strong) IBOutlet MyOtherClass *topLevelObject;

@end

 

2.If you specify a nib file when creating the view controller, that nib file is loaded automatically when you try to access the view controller’s view.

3.