iOS device orientation and user interface orientation

UIDeviceOrientationRefers to the physical orientation of the device whereas UIInterfaceOrientation refers to the orientation of the user interface.

UIDeviceOrientationis a property UIDevice of the class, and there is these possible values:

 uideviceorientationunknown-can " t be Determined  uideviceorientationportrait- Home button facing Downuideviceorientationportraitupsidedown - Home button facing Upuideviceorientationlandscapeleft - Home button facing Rightuideviceorientationlandscaperight - Home button facing Leftuideviceorientationfaceup -Device is   flat, with the screen facing Upuideviceorientationfacedown -Device is  flat, with screens facing down 

UIInterfaceOrientation As for, it's a property of an and only UIApplication contains 4 possibilities which correspond to the Orientat Ion of the status bar:

uiinterfaceorientationportrait == = = Uideviceorientationlandscapeleft

Get device orientation and user interface Orientation

Get device orientation UIDeviceOrientation :

[[Uidevice Currentdevice] orientation]

Gets the user interface orientation UIInterfaceOrientation ,

Monitoring of device and user interface orientation changes

Device Orientation Change

[[nsnotificationcenter defaultcenter] addobserver:self SE Lector: @selector (handleorientchange:) name:uideviceorientationdidchangenotific ationObject: nil];?- (void) orientationchanged: (Nsnotification *) notification{[self adjustviewsfororientation:[[uiapplication sharedapplication] Statusbarorientation]];}?- (void) Adjustviewsfororientation: (uiinterfaceorientation) Orientation {? Switch(orientation) { Caseuiinterfaceorientationportrait: CaseUiinterfaceorientationportraitupsidedown: {//Load the portrait view        }?  Break;  CaseUiinterfaceorientationlandscapeleft: Caseuiinterfaceorientationlandscaperight: {//load the landscape view        }             Break;  CaseUiinterfaceorientationunknown: Break; }}?

User interface Orientation Change

[[Nsnotificationcenter Defaultcenter] addobserver:self selector: @selector (didchangeorientation:) Name:uiapplicationdidchangestatusbarorientationnotificationObject: nil];?- (void) Didchangeorientation: (Nsnotification *) notification{uiinterfaceorientation orientation=[UIApplication sharedapplication].statusbarorientation;? if(Uiinterfaceorientationislandscape (orientation)) {NSLog (@"Landscape"); }    Else{NSLog (@"Portrait")    }}

Use Nsnotificationcenter to remember the Remove observer in the Dealloc method

[[Nsnotificationcenter Defaultcenter] removeobserver:self];

Judging whether vertical screen

BOOL isportrait = uideviceorientationisportrait (self.interfaceorientation);

Judging the screen

BOOL Islandscape = self.view.frame.size.width > self.view.frame.size.height;

This method is problematic when controllers is not full-screen.

Sue_zheng

Source:http://www.cnblogs.com/sueZheng/p/4954938.html

iOS device orientation and user interface orientation