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小丸工具箱竖屏变横屏(小丸工具箱竖屏变横屏了)

发布者:小丸工具箱发布时间:2022-09-01访问量:279

一、监听屏幕旋转方向

在处理iOS横竖屏时小丸工具箱竖屏变横屏,经常会和UIDeviceOrientation、UIInterfaceOrientation和UIInterfaceOrientationMask这三个枚举类型打交道,它们从不同角度描述小丸工具箱竖屏变横屏了屏幕旋转方向。

1、UIDeviceOrientation:设备方向

iOS小丸工具箱竖屏变横屏的设备方向是通过iOS小丸工具箱竖屏变横屏的加速计来获取的。

1)iOS定义小丸工具箱竖屏变横屏了以下七种设备方向

typedefNS_ENUM(NSInteger,UIDeviceOrientation){

UIDeviceOrientationUnknown,// 未知方向,可能是设备(屏幕)斜置

UIDeviceOrientationPortrait,// 设备(屏幕)直立

UIDeviceOrientationPortraitUpsideDown,// 设备(屏幕)直立,上下顛倒

UIDeviceOrientationLandscapeLeft,// 设备(屏幕)向左横置

UIDeviceOrientationLandscapeRight,// 设备(屏幕)向右橫置

UIDeviceOrientationFaceUp,// 设备(屏幕)朝上平躺

UIDeviceOrientationFaceDown// 设备(屏幕)朝下平躺

};

typedefNS_ENUM(NSInteger,UIDeviceOrientation){

UIDeviceOrientationUnknown,// 未知方向,可能是设备(屏幕)斜置

UIDeviceOrientationPortrait,// 设备(屏幕)直立

UIDeviceOrientationPortraitUpsideDown,// 设备(屏幕)直立,上下顛倒

UIDeviceOrientationLandscapeLeft,// 设备(屏幕)向左横置

展开全文

UIDeviceOrientationLandscapeRight,// 设备(屏幕)向右橫置

UIDeviceOrientationFaceUp,// 设备(屏幕)朝上平躺

UIDeviceOrientationFaceDown// 设备(屏幕)朝下平躺

};

说明:UIDeviceOrientation参考home键方向,如:home方向在右,设备(屏幕)方向向左(UIDeviceOrientationLandscapeLeft)

2)读取设备方向

UIDevice单例代表当前的设备。从这个单例中可以获得的信息设备,如设备方向orientation。

UIDeviceOrientationdeviceOrientation= [UIDevicecurrentDevice].orientation;

UIDeviceOrientationdeviceOrientation= [UIDevicecurrentDevice].orientation;

3)监听、处理和移除 设备方向改变的通知

当设备方向变化时候,发出UIDeviceOrientationDidChangeNotification通知;注册监听该通知,可以针对不同的设备方向处理视图展示。

//开启和监听 设备旋转的通知(不开启的话,设备方向一直是UIInterfaceOrientationUnknown)

if(![UIDevicecurrentDevice].generatesDeviceOrientationNotifications){

[[UIDevicecurrentDevice]beginGeneratingDeviceOrientationNotifications];

}

[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(handleDeviceOrientationChange:)

name:UIDeviceOrientationDidChangeNotificationobject:nil];

//设备方向改变的处理

- (void)handleDeviceOrientationChange:(NSNotification*)notification{

UIDeviceOrientationdeviceOrientation= [UIDevicecurrentDevice].orientation;

switch(ddeviceOrientation){

caseUIDeviceOrientationFaceUp:

NSLog(@"屏幕朝上平躺");

break;

caseUIDeviceOrientationFaceDown:

NSLog(@"屏幕朝下平躺");

break;

caseUIDeviceOrientationUnknown:

NSLog(@"未知方向");

break;

caseUIDeviceOrientationLandscapeLeft:

NSLog(@"屏幕向左横置");

break;

caseUIDeviceOrientationLandscapeRight:

NSLog(@"屏幕向右橫置");

break;

caseUIDeviceOrientationPortrait:

NSLog(@"屏幕直立");

break;

caseUIDeviceOrientationPortraitUpsideDown:

NSLog(@"屏幕直立,上下顛倒");

break;

default:

NSLog(@"无法辨识");

break;

}

}

//最后在dealloc中移除通知 和结束设备旋转的通知

- (void)dealloc{

//...

[[NSNotificationCenterdefaultCenter]removeObserver:self];

[[UIDevicecurrentDevice]endGeneratingDeviceOrientationNotifications];

//开启和监听 设备旋转的通知(不开启的话,设备方向一直是UIInterfaceOrientationUnknown)

if(![UIDevicecurrentDevice].generatesDeviceOrientationNotifications){

[[UIDevicecurrentDevice]beginGeneratingDeviceOrientationNotifications];

}

[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(handleDeviceOrientationChange:)

name:UIDeviceOrientationDidChangeNotificationobject:nil];

//设备方向改变的处理

- (void)handleDeviceOrientationChange:(NSNotification*)notification{

UIDeviceOrientationdeviceOrientation= [UIDevicecurrentDevice].orientation;

switch(ddeviceOrientation){

caseUIDeviceOrientationFaceUp:

NSLog(@"屏幕朝上平躺");

break;

caseUIDeviceOrientationFaceDown:

NSLog(@"屏幕朝下平躺");

break;

caseUIDeviceOrientationUnknown:

NSLog(@"未知方向");

break;

caseUIDeviceOrientationLandscapeLeft:

NSLog(@"屏幕向左横置");

break;

caseUIDeviceOrientationLandscapeRight:

NSLog(@"屏幕向右橫置");

break;

caseUIDeviceOrientationPortrait:

NSLog(@"屏幕直立");

break;

caseUIDeviceOrientationPortraitUpsideDown:

NSLog(@"屏幕直立,上下顛倒");

break;

default:

NSLog(@"无法辨识");

break;

}

}

//最后在dealloc中移除通知 和结束设备旋转的通知

- (void)dealloc{

//...

[[NSNotificationCenterdefaultCenter]removeObserver:self];

[[UIDevicecurrentDevice]endGeneratingDeviceOrientationNotifications];

说明:手机锁定竖屏后,UIDeviceOrientationDidChangeNotification通知就失效了。

2、UIInterfaceOrientation:界面方向

界面方向是反应iOS中界面的方向,它和Home按钮的方向是一致的。

1)iOS定义了以下五种界面方向

typedefNS_ENUM(NSInteger,UIInterfaceOrientation){

UIInterfaceOrientationUnknown= UIDeviceOrientationUnknown,//未知方向

UIInterfaceOrientationPortrait= UIDeviceOrientationPortrait,//界面直立

UIInterfaceOrientationPortraitUpsideDown= UIDeviceOrientationPortraitUpsideDown,//界面直立,上下颠倒

UIInterfaceOrientationLandscapeLeft= UIDeviceOrientationLandscapeRight,//界面朝左

UIInterfaceOrientationLandscapeRight= UIDeviceOrientationLandscapeLeft//界面朝右

}__TVOS_PROHIBITED;

typedefNS_ENUM(NSInteger,UIInterfaceOrientation){

UIInterfaceOrientationUnknown= UIDeviceOrientationUnknown,//未知方向

UIInterfaceOrientationPortrait= UIDeviceOrientationPortrait,//界面直立

UIInterfaceOrientationPortraitUpsideDown= UIDeviceOrientationPortraitUpsideDown,//界面直立,上下颠倒

UIInterfaceOrientationLandscapeLeft= UIDeviceOrientationLandscapeRight,//界面朝左

UIInterfaceOrientationLandscapeRight= UIDeviceOrientationLandscapeLeft//界面朝右

}__TVOS_PROHIBITED;

说明:从定义可知,界面方向和设别方向有对应关系,如界面的竖直方向就是 设备的竖直方向:UIInterfaceOrientationUnknown = UIDeviceOrientationUnknown

2)读取界面方向

UIInterfaceOrientation和状态栏有关,通过UIApplication的单例调用statusBarOrientation来获取

UIInterfaceOrientationinterfaceOrientation= [[UIApplicationsharedApplication]statusBarOrientation];

UIInterfaceOrientationinterfaceOrientation= [[UIApplicationsharedApplication]statusBarOrientation];

3)监听、处理和移除 界面方向改变的通知

当界面方向变化时候,先后发出UIApplicationWillChangeStatusBarOrientationNotification和UIApplicationDidChangeStatusBarOrientationNotification通知;注册监听这两个通知,可以针对不同的界面方向处理视图展示。

//以监听UIApplicationDidChangeStatusBarOrientationNotification通知为例

[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(handleStatusBarOrientationChange:)

name:UIApplicationDidChangeStatusBarOrientationNotificationobject:nil];

//界面方向改变的处理

- (void)handleStatusBarOrientationChange: (NSNotification*)notification{

UIInterfaceOrientationinterfaceOrientation= [[UIApplicationsharedApplication]statusBarOrientation];

switch(interfaceOrientation){

caseUIInterfaceOrientationUnknown:

NSLog(@"未知方向");

break;

caseUIInterfaceOrientationPortrait:

NSLog(@"界面直立");

break;

caseUIInterfaceOrientationPortraitUpsideDown:

NSLog(@"界面直立,上下颠倒");

break;

caseUIInterfaceOrientationLandscapeLeft:

NSLog(@"界面朝左");

break;

caseUIInterfaceOrientationLandscapeRight:

NSLog(@"界面朝右");

break;

default:

break;

}

}

//最后在dealloc中移除通知

- (void)dealloc{

//...

[[NSNotificationCenterdefaultCenter]removeObserver:self];

[[UIDevicecurrentDevice]endGeneratingDeviceOrientationNotifications];

}

//以监听UIApplicationDidChangeStatusBarOrientationNotification通知为例

[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(handleStatusBarOrientationChange:)

name:UIApplicationDidChangeStatusBarOrientationNotificationobject:nil];

//界面方向改变的处理

- (void)handleStatusBarOrientationChange: (NSNotification*)notification{

UIInterfaceOrientationinterfaceOrientation= [[UIApplicationsharedApplication]statusBarOrientation];

switch(interfaceOrientation){

caseUIInterfaceOrientationUnknown:

NSLog(@"未知方向");

break;

caseUIInterfaceOrientationPortrait:

NSLog(@"界面直立");

break;

caseUIInterfaceOrientationPortraitUpsideDown:

NSLog(@"界面直立,上下颠倒");

break;

caseUIInterfaceOrientationLandscapeLeft:

NSLog(@"界面朝左");

break;

caseUIInterfaceOrientationLandscapeRight:

NSLog(@"界面朝右");

break;

default:

break;

}

}

//最后在dealloc中移除通知

- (void)dealloc{

//...

[[NSNotificationCenterdefaultCenter]removeObserver:self];

[[UIDevicecurrentDevice]endGeneratingDeviceOrientationNotifications];

}

说明:手机锁定竖屏后,UIApplicationWillChangeStatusBarOrientationNotification和UIApplicationDidChangeStatusBarOrientationNotification通知也失效了。

3、UIInterfaceOrientationMask

UIInterfaceOrientationMask是为了集成多种UIInterfaceOrientation而定义的类型,和ViewController相关,一共有7种

1)iOS中的UIInterfaceOrientationMask定义

typedefNS_OPTIONS(NSUInteger,UIInterfaceOrientationMask){

UIInterfaceOrientationMaskPortrait= (1<< UIInterfaceOrientationPortrait),

UIInterfaceOrientationMaskLandscapeLeft= (1<< UIInterfaceOrientationLandscapeLeft),

UIInterfaceOrientationMaskLandscapeRight= (1<< UIInterfaceOrientationLandscapeRight),

UIInterfaceOrientationMaskPortraitUpsideDown= (1<< UIInterfaceOrientationPortraitUpsideDown),

UIInterfaceOrientationMaskLandscape= (UIInterfaceOrientationMaskLandscapeLeft| UIInterfaceOrientationMaskLandscapeRight),

UIInterfaceOrientationMaskAll= (UIInterfaceOrientationMaskPortrait| UIInterfaceOrientationMaskLandscapeLeft| UIInterfaceOrientationMaskLandscapeRight| UIInterfaceOrientationMaskPortraitUpsideDown),

UIInterfaceOrientationMaskAllButUpsideDown= (UIInterfaceOrientationMaskPortrait| UIInterfaceOrientationMaskLandscapeLeft| UIInterfaceOrientationMaskLandscapeRight),

}__TVOS_PROHIBITED;

typedefNS_OPTIONS(NSUInteger,UIInterfaceOrientationMask){

UIInterfaceOrientationMaskPortrait= (1<< UIInterfaceOrientationPortrait),

UIInterfaceOrientationMaskLandscapeLeft= (1<< UIInterfaceOrientationLandscapeLeft),

UIInterfaceOrientationMaskLandscapeRight= (1<< UIInterfaceOrientationLandscapeRight),

UIInterfaceOrientationMaskPortraitUpsideDown= (1<< UIInterfaceOrientationPortraitUpsideDown),

UIInterfaceOrientationMaskLandscape= (UIInterfaceOrientationMaskLandscapeLeft| UIInterfaceOrientationMaskLandscapeRight),

UIInterfaceOrientationMaskAll= (UIInterfaceOrientationMaskPortrait| UIInterfaceOrientationMaskLandscapeLeft| UIInterfaceOrientationMaskLandscapeRight| UIInterfaceOrientationMaskPortraitUpsideDown),

UIInterfaceOrientationMaskAllButUpsideDown= (UIInterfaceOrientationMaskPortrait| UIInterfaceOrientationMaskLandscapeLeft| UIInterfaceOrientationMaskLandscapeRight),

}__TVOS_PROHIBITED;

2)UIInterfaceOrientationMask的使用

在ViewController可以重写- (UIInterfaceOrientationMask)supportedInterfaceOrientations方法返回类型,来决定UIViewController可以支持哪些界面方向。

//支持界面直立

- (UIInterfaceOrientationMask)supportedInterfaceOrientations{

returnUIInterfaceOrientationMaskPortrait;

}

//支持界面直立

- (UIInterfaceOrientationMask)supportedInterfaceOrientations{

returnUIInterfaceOrientationMaskPortrait;

}

总结:UIDeviceOrientation(设备方向)和UIInterfaceOrientation(屏幕方向)是两个不同的概念。前者代表了设备的一种状态,而后者是屏幕为了应对不同的设备状态,做出的用户界面上的响应。在iOS设备旋转时,由UIKit接收到旋转事件,然后通过AppDelegate通知当前程序的UIWindow对象,UIWindow对象通知它的rootViewController,如果该rootViewController支持旋转后的屏幕方向,完成旋转,否则不旋转;弹出的ViewController也是如此处理。

二、视图控制器中旋转方向的设置

0、关于禁止横屏的操作(不建议)

比较常规的方法有两种。

方法1:在项目的General–>Deployment Info–>Device Orientation中,只勾选Portrait(竖屏)

勾选Portrait.png

方法2:Device Orientation默认设置,在Appdelegate中实现supportedInterfaceOrientationsForWindow:只返回UIInterfaceOrientationMaskPortraitt(竖屏)

- (NSUInteger)application:(UIApplication*)applicationsupportedInterfaceOrientationsForWindow:(UIWindow*)window{

returnUIInterfaceOrientationMaskPortrait;

}

- (NSUInteger)application:(UIApplication*)applicationsupportedInterfaceOrientationsForWindow:(UIWindow*)window{

returnUIInterfaceOrientationMaskPortrait;

}

说明:极少的APP中所有界面都是竖屏的,因为总会有界面需要支持横屏,如视频播放页。所以不建议设置禁止APP页面横屏。

下面介绍如何让项目中的 视图控制器中旋转方向的设置

1、APP支持多个方向

APP支持多个方向.png

说明:如此,APP支持横屏和竖屏了,但是具体视图控制器支持的页面方向还需要进一步处理。由于不支持竖屏颠倒(Upside Down),即使设备上下颠倒,通过API也不会获得设备、屏幕上下颠倒方向的。

2、支持ViewController屏幕方向设置

1)关键函数

视图控制器支持的界面方向主要由以下三个函数控制

//是否自动旋转,返回YES可以自动旋转,返回NO禁止旋转

- (BOOL)shouldAutorotate NS_AVAILABLE_IOS(6_0)__TVOS_PROHIBITED;

//返回支持的方向

- (UIInterfaceOrientationMask)supportedInterfaceOrientations NS_AVAILABLE_IOS(6_0)__TVOS_PROHIBITED;

//由模态推出的视图控制器 优先支持的屏幕方向

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation NS_AVAILABLE_IOS(6_0)__TVOS_PROHIBITED;

//是否自动旋转,返回YES可以自动旋转,返回NO禁止旋转

- (BOOL)shouldAutorotate NS_AVAILABLE_IOS(6_0)__TVOS_PROHIBITED;

//返回支持的方向

- (UIInterfaceOrientationMask)supportedInterfaceOrientations NS_AVAILABLE_IOS(6_0)__TVOS_PROHIBITED;

//由模态推出的视图控制器 优先支持的屏幕方向

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation NS_AVAILABLE_IOS(6_0)__TVOS_PROHIBITED;

2) QSBaseViewController设置

//QSBaseViewController.h

@interfaceQSBaseController : UIViewController

@end

//QSBaseViewController.m

@implementationQSBaseController

//#pragma mark - 控制屏幕旋转方法

//是否自动旋转,返回YES可以自动旋转,返回NO禁止旋转

- (BOOL)shouldAutorotate{

returnNO;

}

//返回支持的方向

- (UIInterfaceOrientationMask)supportedInterfaceOrientations{

returnUIInterfaceOrientationMaskPortrait;

}

//由模态推出的视图控制器 优先支持的屏幕方向

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{

returnUIInterfaceOrientationPortrait;

}

@end

//QSBaseViewController.h

@interfaceQSBaseController : UIViewController

@end

//QSBaseViewController.m

@implementationQSBaseController

//#pragma mark - 控制屏幕旋转方法

//是否自动旋转,返回YES可以自动旋转,返回NO禁止旋转

- (BOOL)shouldAutorotate{

returnNO;

}

//返回支持的方向

- (UIInterfaceOrientationMask)supportedInterfaceOrientations{

returnUIInterfaceOrientationMaskPortrait;

}

//由模态推出的视图控制器 优先支持的屏幕方向

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{

returnUIInterfaceOrientationPortrait;

}

@end

说明1:QSBaseViewController默认不支持旋转,只支持 界面竖直方向,项目中的Controller都继承自QSBaseViewController,可以通过重写这三个方法来让Controller支持除竖屏之外的方向或旋转。

3) 在QSNavigationController设置

目标:通过QSNavigationController来push视图控制器时,把支持屏幕旋转的设置交给最新push进来([self.viewControllers lastObject])的viewController来设置。

//QSNavigationController.h

@interfaceQSNavigationController : UINavigationController

@end

//QSNavigationController.m

@implementationQSNavigationController

#pragma mark - 控制屏幕旋转方法

- (BOOL)shouldAutorotate{

return[[self.viewControllers lastObject]shouldAutorotate];

}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations{

return[[self.viewControllers lastObject]supportedInterfaceOrientations];

}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{

return[[self.viewControllers lastObject]preferredInterfaceOrientationForPresentation];

}

@end

//QSNavigationController.h

@interfaceQSNavigationController : UINavigationController

@end

//QSNavigationController.m

@implementationQSNavigationController

#pragma mark - 控制屏幕旋转方法

- (BOOL)shouldAutorotate{

return[[self.viewControllers lastObject]shouldAutorotate];

}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations{

return[[self.viewControllers lastObject]supportedInterfaceOrientations];

}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{

return[[self.viewControllers lastObject]preferredInterfaceOrientationForPresentation];

}

@end

4) 在QSTabBarController设置

目标:TabBarController通常作为整个程序的rootViewController,UITabBar上面显示的每一个Tab都对应着一个ViewController;每点击一个Tab,出现的ViewController(self.selectedViewController)对屏幕旋转和支持方向的设置 交给其自身去控制。

//QSTabBarController.h

@interfaceQSTabBarController : UITabBarController

@end

//QSTabBarController.m

@implementationQSTabBarController

#pragma mark - 控制屏幕旋转方法

- (BOOL)shouldAutorotate{

return[self.selectedViewController shouldAutorotate];

}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations{

return[self.selectedViewController supportedInterfaceOrientations];

}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{

return[self.selectedViewController preferredInterfaceOrientationForPresentation];

}

@end

//QSTabBarController.h

@interfaceQSTabBarController : UITabBarController

@end

//QSTabBarController.m

@implementationQSTabBarController

#pragma mark - 控制屏幕旋转方法

- (BOOL)shouldAutorotate{

return[self.selectedViewController shouldAutorotate];

}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations{

return[self.selectedViewController supportedInterfaceOrientations];

}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{

return[self.selectedViewController preferredInterfaceOrientationForPresentation];

}

@end

三、屏幕旋转方向下的视图处理

1、屏幕旋转时,建议监听UIApplicationDidChangeStatusBarOrientationNotification

原因1:supportedInterfaceOrientations方法中最终返回的是 多个界面方向。

原因2(最重要的原因):我们真正要处理的是页面方向发生旋转UI的变化。而在设备的物理方向发生旋转的时候,如果此时当前控制器的页面并没有旋转,我们这时改变UI布局,可能就发生问题了。

2、屏幕的宽高处理

1)在iOS 8之后,当屏幕旋转的时候,[[UIScreen mainScreen] bounds]也发生了改变。如横屏时候的屏幕宽度 其实是竖屏的时候屏幕的高度。

2)我们处理视图布局时候,如果使用到屏幕的宽高,不要直接使用SCREEN_HEIGHT和SCREEN_WIDTH,而使用SCREEN_MIN和SCREEN_MAX

#define SCREEN_HEIGHT CGRectGetHeight([[UIScreen mainScreen] bounds])

#define SCREEN_WIDTH CGRectGetWidth([[UIScreen mainScreen] bounds])

#define SCREEN_MIN MIN(SCREEN_HEIGHT,SCREEN_WIDTH)

#define SCREEN_MAX MAX(SCREEN_HEIGHT,SCREEN_WIDTH)

#define SCREEN_HEIGHT CGRectGetHeight([[UIScreen mainScreen] bounds])

#define SCREEN_WIDTH CGRectGetWidth([[UIScreen mainScreen] bounds])

#define SCREEN_MIN MIN(SCREEN_HEIGHT,SCREEN_WIDTH)

#define SCREEN_MAX MAX(SCREEN_HEIGHT,SCREEN_WIDTH)

说明:竖屏时候,宽是SCREEN_MIN,高是SCREEN_MAX;横屏时候,宽是SCREEN_MAX,高是SCREEN_MIN。

3、屏幕旋转下处理Demo

//监听UIApplicationDidChangeStatusBarOrientationNotification的处理

- (void)handleStatusBarOrientationChange: (NSNotification*)notification{

UIInterfaceOrientationinterfaceOrientation= [[UIApplicationsharedApplication]statusBarOrientation];

BOOLisLandscape= NO;

switch(interfaceOrientation){

caseUIInterfaceOrientationUnknown:

NSLog(@"未知方向");

break;

caseUIInterfaceOrientationPortrait:

caseUIInterfaceOrientationPortraitUpsideDown:

isLandscape= NO;

break;

caseUIInterfaceOrientationLandscapeLeft:

caseUIInterfaceOrientationLandscapeRight:

isLandscape= YES;

break;

default:

break;

}

if(isLandscape){

self.tableView.frame= CGRectMake(0,0,SCREEN_MAX,SCREEN_MIN- 44);

}else{

self.tableView.frame= CGRectMake(0,0,SCREEN_MIN,SCREEN_MAX- 64);

}

[self.tableView reloadData];

}

//监听UIApplicationDidChangeStatusBarOrientationNotification的处理

- (void)handleStatusBarOrientationChange: (NSNotification*)notification{

UIInterfaceOrientationinterfaceOrientation= [[UIApplicationsharedApplication]statusBarOrientation];

BOOLisLandscape= NO;

switch(interfaceOrientation){

caseUIInterfaceOrientationUnknown:

NSLog(@"未知方向");

break;

caseUIInterfaceOrientationPortrait:

caseUIInterfaceOrientationPortraitUpsideDown:

isLandscape= NO;

break;

caseUIInterfaceOrientationLandscapeLeft:

caseUIInterfaceOrientationLandscapeRight:

isLandscape= YES;

break;

default:

break;

}

if(isLandscape){

self.tableView.frame= CGRectMake(0,0,SCREEN_MAX,SCREEN_MIN- 44);

}else{

self.tableView.frame= CGRectMake(0,0,SCREEN_MIN,SCREEN_MAX- 64);

}

[self.tableView reloadData];

}

说明:当然也可以选择使用Masonry这样优秀的AutoLayout布局第三方库来处理,storyBoard来布局次之。

4、屏幕旋转下处理Demo效果图

竖屏下效果.png

横屏下效果.png

5、屏幕旋转处理的建议

1)旋转前后,view当前显示的位置尽量不变

2)旋转过程中,暂时界面操作的响应

3)视图中有tableview的话,旋转后,强制 [tableview reloadData],保证在方向变化以后,新的row能够充满全屏。

四、强制横屏

APP中某些页面,如视频播放页,一出现就要求横屏。这些横屏页面或模态弹出、或push进来。

1、模态弹出ViewController情况下 强制横屏的设置

//QSShow3Controller.m

- (BOOL)shouldAutorotate{

returnNO;

}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations{

returnUIInterfaceOrientationMaskLandscapeRight;

}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{

returnUIInterfaceOrientationLandscapeRight;

}

//模态弹出

QSShow3Controller*vc= [[QSShow3Controlleralloc]init];

[selfpresentViewController:vcanimated:YEScompletion:nil];

//QSShow3Controller.m

- (BOOL)shouldAutorotate{

returnNO;

}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations{

returnUIInterfaceOrientationMaskLandscapeRight;

}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{

returnUIInterfaceOrientationLandscapeRight;

}

//模态弹出

QSShow3Controller*vc= [[QSShow3Controlleralloc]init];

[selfpresentViewController:vcanimated:YEScompletion:nil];

说明:这种情况比较简单处理。

2、push推入ViewController情况下 强制横屏的设置

//QSShow4Controller.m

-(void)viewWillAppear:(BOOL)animated{

[superviewWillAppear:animated];

[selfsetInterfaceOrientation:UIInterfaceOrientationLandscapeRight];

}

//强制转屏(这个方法最好放在BaseVController中)

- (void)setInterfaceOrientation:(UIInterfaceOrientation)orientation{

if([[UIDevicecurrentDevice]respondsToSelector:@selector(setOrientation:)]){

SELselector= NSSelectorFromString(@"setOrientation:");

NSInvocation*invocation= [NSInvocationinvocationWithMethodSignature:[UIDeviceinstanceMethodSignatureForSelector:selector]];

[invocationsetSelector:selector];

[invocationsetTarget:[UIDevicecurrentDevice]];

// 从2开始是因为前两个参数已经被selector和target占用

[invocationsetArgument:&orientationatIndex:2];

[invocation invoke];

}

}

//必须返回YES

- (BOOL)shouldAutorotate{

returnYES;

}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations{

returnUIInterfaceOrientationMaskLandscapeRight;

}

//Push推入

QSShow4Controller*vc= [[QSShow4Controlleralloc]init];

[self.navigationControllerpushViewController:vcanimated:YES];

//QSShow4Controller.m

-(void)viewWillAppear:(BOOL)animated{

[superviewWillAppear:animated];

[selfsetInterfaceOrientation:UIInterfaceOrientationLandscapeRight];

}

//强制转屏(这个方法最好放在BaseVController中)

- (void)setInterfaceOrientation:(UIInterfaceOrientation)orientation{

if([[UIDevicecurrentDevice]respondsToSelector:@selector(setOrientation:)]){

SELselector= NSSelectorFromString(@"setOrientation:");

NSInvocation*invocation= [NSInvocationinvocationWithMethodSignature:[UIDeviceinstanceMethodSignatureForSelector:selector]];

[invocationsetSelector:selector];

[invocationsetTarget:[UIDevicecurrentDevice]];

// 从2开始是因为前两个参数已经被selector和target占用

[invocationsetArgument:&orientationatIndex:2];

[invocation invoke];

}

}

//必须返回YES

- (BOOL)shouldAutorotate{

returnYES;

}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations{

returnUIInterfaceOrientationMaskLandscapeRight;

}

//Push推入

QSShow4Controller*vc= [[QSShow4Controlleralloc]init];

[self.navigationControllerpushViewController:vcanimated:YES];

说明:苹果不允许直接调用setOrientation方法,否则有被拒的风险;使用NSInvocation对象给[UIDevice currentDevice]发消息,强制改变设备方向,使其页面方向对应改变,这是苹果允许的。

五、其他

1、 APP启动时,手机横屏下,首页UI(该页面只支持竖屏)出错(add by 2017/6/20)

//设置设置状态栏竖屏

[[UIApplicationsharedApplication]setStatusBarOrientation:UIInterfaceOrientationPortrait];

//设置设置状态栏竖屏

[[UIApplicationsharedApplication]setStatusBarOrientation:UIInterfaceOrientationPortrait];

来源:南华Coder 自荐投稿

www.jianshu.com/p/780738918a6c

以上详细源码参考:QSRotationScreenDemo

https://github.com/buaa0300/QSKitDemo/tree/master/QSRotationScreenDemo

iOS开发整理发布,转载请联系作者授权

来源:南华Coder 自荐投稿

www.jianshu.com/p/780738918a6c

以上详细源码参考:QSRotationScreenDemo

https://github.com/buaa0300/QSKitDemo/tree/master/QSRotationScreenDemo

iOS开发整理发布,转载请联系作者授权