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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
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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