How Uiviewcontroller is created

Uiviewcontroller is created in three different ways

The first creation method is created directly

Zywviewcontroller *VC = [[Zywviewcontroller alloc] init];

Vc.view.backgroundColor = [Uicolor Bluecolor];

The second creation method is created by storyboard

Uistoryboard *testbodard = [Uistoryboard storyboardwithname:@ "Test" Bundle:[nsbundle Mainbundle]];

//Get The Initialize view controller (i.e. the controller indicated by the arrow)

Zywviewcontroller *VC = [Testbodard Instantiateinitialviewcontroller];

get the controller based on the identifier (that is, the storyboard ID is set to test)

Zywviewcontroller *VC = [testbodard instantiateviewcontrollerwithidentifier:@ "test"];

The third method of creation is created by Xib

Note that the first owner 's class for Xib is set to the current controller at two .

then set the View ( Wired) of first owner's view as you drag

Zywviewcontroller *VC = [[Zywviewcontroller alloc] initwithnibname:@ "Test" bundle: Nil];

How Uiviewcontroller is created