UIDeviceOrientation和UIInterfaceOrientation的区别

UIDeviceOrientation 是机器硬件的当前旋转方向 这个你只能取值 不能设置

UIInterfaceOrientation 是你程序界面的当前旋转方向 这个可以设置

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    self.view.backgroundColor = [UIColor whiteColor];
    //屏幕旋转通知
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(onDeviceOrientationChange) name:UIDeviceOrientationDidChangeNotification object:nil];
}

#pragma mark - 全屏设置
- (void)onDeviceOrientationChange {
    UIDeviceOrientation orientation = [UIDevice currentDevice].orientation;
    switch (orientation) {
        case UIDeviceOrientationFaceUp:
            NSLog(@"屏幕朝上平躺");
            break;
        case UIDeviceOrientationFaceDown:
            NSLog(@"屏幕朝下平躺");
            break;
        case UIDeviceOrientationUnknown:
            NSLog(@"未知方向");
            break;
        case UIDeviceOrientationLandscapeLeft:
            NSLog(@"屏幕向左横置");
            break;
        case UIDeviceOrientationLandscapeRight:
            NSLog(@"屏幕向右橫置");
            break;
        case UIDeviceOrientationPortrait:
            NSLog(@"屏幕直立");
            break;
        case UIDeviceOrientationPortraitUpsideDown:
            NSLog(@"屏幕直立，上下顛倒");
            break;
        default:
            NSLog(@"无法辨识");
            break;
    }
}

@end

typedef enum {

    UIDeviceOrientationUnknown,

    UIDeviceOrientationPortrait,            // Device oriented vertically, home button on the bottom

    UIDeviceOrientationPortraitUpsideDown,  // Device oriented vertically, home button on the top

    UIDeviceOrientationLandscapeLeft,       // Device oriented horizontally, home button on the right

    UIDeviceOrientationLandscapeRight,      // Device oriented horizontally, home button on the left

    UIDeviceOrientationFaceUp,              // Device oriented flat, face up

    UIDeviceOrientationFaceDown             // Device oriented flat, face down

} UIDeviceOrientation;

 

typedef enum {

    UIInterfaceOrientationPortrait           = UIDeviceOrientationPortrait,

    UIInterfaceOrientationPortraitUpsideDown = UIDeviceOrientationPortraitUpsideDown,

    UIInterfaceOrientationLandscapeLeft      = UIDeviceOrientationLandscapeRight,

    UIInterfaceOrientationLandscapeRight     = UIDeviceOrientationLandscapeLeft

} UIInterfaceOrientation;