ios 屏幕旋转大全

如果希望所有界面不可以旋转 则可也在Target —> general 的 device orientation 禁止掉就可以了

或者也可以在AppDelegate中增加，这个方法可以禁止横屏

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window  
    {  
         return UIInterfaceOrientationMaskPortrait;  
    }

一般我们都是希望某个页面可以选装例如 图片浏览的页面可以横屏，我这里例子图片浏览界面的图片浏览框架出自（code4app  mj哥的一个demo）

加速计是整个IOS屏幕旋转的基础，依赖加速计，设备才可以判断出当前的设备方向，IOS系统共定义了以下七种设备方向：

typedef NS_ENUM(NSInteger, UIDeviceOrientation) {    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};

 　　以及如下四种界面方向：

typedef NS_ENUM(NSInteger, UIInterfaceOrientation) {    UIInterfaceOrientationPortrait           = UIDeviceOrientationPortrait,    UIInterfaceOrientationPortraitUpsideDown = UIDeviceOrientationPortraitUpsideDown,    UIInterfaceOrientationLandscapeLeft      = UIDeviceOrientationLandscapeRight,    UIInterfaceOrientationLandscapeRight     = UIDeviceOrientationLandscapeLeft}; 我这里整体是一个tabbarController的程序

1、定义tabbarController的子类

[objc] view plaincopy

1. //  
2. //  BaseTabBarViewController.m  
3. //  WithBusiness  
4. //  
5. //  Created by king on 14-6-18.  
6. //  Copyright (c) 2014年 sinosoft. All rights reserved.  
7. //  
8.   
9. #import "BaseTabBarViewController.h"  
10. #import "MJPhotoBrowser.h"  
11. #import "BaseNavigationViewController.h"  
12. @interface BaseTabBarViewController ()  
13.   
14. @end  
15.   
16. @implementation BaseTabBarViewController  
17.   
18. - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil  
19. {  
20.     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];  
21.     if (self) {  
22.         // Custom initialization  
23.     }  
24.     return self;  
25. }  
26.   
27. - (void)viewDidLoad  
28. {  
29.     [super viewDidLoad];  
30.     // Do any additional setup after loading the view.  
31. }  
32.   
33. - (void)didReceiveMemoryWarning  
34. {  
35.     [super didReceiveMemoryWarning];  
36.     // Dispose of any resources that can be recreated.  
37. }  
38.   
39. //6.0之前   
40. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation  
41. {  
42.     if ([[self getTopViewController] isKindOfClass:[MJPhotoBrowser class]]) {  
43.         return [(MJPhotoBrowser*)[self getTopViewController] shouldAutorotateToInterfaceOrientation:interfaceOrientation];  
44.     }  
45.     //禁止旋转  
46.     return (interfaceOrientation==UIInterfaceOrientationPortrait);  
47. }  
48.   
49. //6.0之后 包括6.0  
50. - (BOOL)shouldAutorotate  
51. {  
52.     if ([[self getTopViewController] isKindOfClass:[MJPhotoBrowser class]]) {  
53.         return YES;  
54.           
55.         //这里我直接return  yes  也可也return 下面这行代码 由topViewController来做控制  
56. //        return [[self getTopViewController] shouldAutorotate];  
57.     }  
58.     return NO;  
59. }  
60.   
61. //  
62. - (NSUInteger)supportedInterfaceOrientations  
63. {  
64.     if ([[self getTopViewController] isKindOfClass:[MJPhotoBrowser class]]) {  
65.         return [(MJPhotoBrowser*)[self getTopViewController] supportedInterfaceOrientations];  
66.     }  
67.     //返回UIDeviceOrientationPortraitUpsideDown， 当在图片浏览界面横屏返回上一页面的时候会自动恢复到竖屏  
68.     return UIDeviceOrientationPortraitUpsideDown;  
69. }  
70.   
71. -(void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration  
72. {  
73.     return [[self getTopViewController] willAnimateRotationToInterfaceOrientation:toInterfaceOrientation duration:duration];  
74. }  
75.   
76.   
77. //获取最顶层的ViewController  
78. - (id)getTopViewController{  
79.       
80.     BaseNavigationViewController *navCtr = (BaseNavigationViewController*)self.selectedViewController;  
81.       
82.     BaseUIViewController *viewController = (BaseUIViewController *)navCtr.topViewController;  
83.     return viewController;  
84. }  
85.   
86.   
87. @end  

在mjBrowser的类里面

[objc] view plaincopy

1. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation  
2. {  
3.     if([[UIDevice currentDevice] orientation] == UIInterfaceOrientationLandscapeRight  
4.        ||[[UIDevice currentDevice] orientation] == UIInterfaceOrientationPortrait  
5.        ||[[UIDevice currentDevice] orientation]==UIInterfaceOrientationLandscapeLeft){  
6.         return YES;  
7.     }  
8.     return NO;  
9. }  
10.   
11. - (BOOL)shouldAutorotate  
12. {  
13.     if([[UIDevice currentDevice] orientation] == UIInterfaceOrientationLandscapeRight  
14.        ||[[UIDevice currentDevice] orientation] == UIInterfaceOrientationPortrait  
15.        ||[[UIDevice currentDevice] orientation]==UIInterfaceOrientationLandscapeLeft){  
16.         return YES;  
17.     }  
18.     return NO;  
19. }  

要旋转的时候会调用这个方法

[objc] view plaincopy

1. -(void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration{  

可以里面做一些横屏操作

判断是否横屏：

[objc] view plaincopy

1. if ([[UIDevice currentDevice] orientation] == UIInterfaceOrientationLandscapeRight  
2.             ||[[UIDevice currentDevice] orientation]==UIInterfaceOrientationLandscapeLeft) {  
3.             _screen_change = YES;  
4.               
5.         }