概述

最近在做有關(guān)音視頻的項(xiàng)目孩擂，項(xiàng)目中涉及到全屏播放切換的問(wèn)題森爽，最近研究了一下。在此做個(gè)記錄提针，實(shí)現(xiàn)全屏效果我目前能夠用兩種方法實(shí)現(xiàn)藕甩，一種是讓App需要進(jìn)行全屏的頁(yè)面隨著設(shè)備進(jìn)行旋轉(zhuǎn)施敢，另外一種是把需要全屏的view放到window上面，為window添加旋轉(zhuǎn)動(dòng)畫狭莱。在這介紹的是使用window實(shí)現(xiàn)全屏功能僵娃。

補(bǔ)充說(shuō)明

由于在iOS13調(diào)用setStatusBarOrientation無(wú)效，所以做了些調(diào)整腋妙，已經(jīng)兼容 iOS13

效果

fullScreen

#import "VideoFullScreenController.h"

static CGFloat AnimationDuration = 0.3;//旋轉(zhuǎn)動(dòng)畫執(zhí)行時(shí)間

@interface VideoFullScreenController ()

@property (nonatomic, nullable, strong) UIView *playerView;//播放器視圖
@property (nonatomic, nullable, strong) UIButton *btnFullScreen;
@property (nonatomic, nullable, strong) UIView *playerSuperView;//記錄播放器父視圖
@property (nonatomic, assign) CGRect playerFrame;//記錄播放器原始frame
@property (nonatomic, assign) BOOL isFullScreen;//記錄是否全屏

@property (nonatomic, assign) UIInterfaceOrientation lastInterfaceOrientation;//記錄最后一次旋轉(zhuǎn)方向
@property (nonatomic, nullable, strong) UIWindow *mainWindow;

@end

@implementation VideoFullScreenController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self.playerView addSubview:self.btnFullScreen];
    [self.view addSubview:self.playerView];
    
    if (@available(iOS 13.0, *)) {
        _lastInterfaceOrientation = [UIApplication sharedApplication].windows.firstObject.windowScene.interfaceOrientation;
    } else {
        _lastInterfaceOrientation = [UIApplication sharedApplication].statusBarOrientation;
    }
    //開(kāi)啟和監(jiān)聽(tīng) 設(shè)備旋轉(zhuǎn)的通知
    if (![UIDevice currentDevice].generatesDeviceOrientationNotifications) {
        [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
    }
    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(handleDeviceOrientationChange:)
                                                name:UIDeviceOrientationDidChangeNotification object:nil];
}

//設(shè)備方向改變的處理
- (void)handleDeviceOrientationChange:(NSNotification *)notification{
    UIDeviceOrientation deviceOrientation = [UIDevice currentDevice].orientation;
    switch (deviceOrientation) {
        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:
            if (self.isFullScreen) {
                [self interfaceOrientation:UIInterfaceOrientationLandscapeRight];
            }
            
            NSLog(@"屏幕向左橫置");
            break;
        case UIDeviceOrientationLandscapeRight:
            if (self.isFullScreen) {
                [self interfaceOrientation:UIInterfaceOrientationLandscapeLeft];
            }
            
            NSLog(@"屏幕向右橫置");
            break;
        case UIDeviceOrientationPortrait:
            NSLog(@"屏幕直立");
            break;
        case UIDeviceOrientationPortraitUpsideDown:
            NSLog(@"屏幕直立默怨，上下顛倒");
            break;
        default:
            NSLog(@"無(wú)法辨識(shí)");
            break;
    }
}
//最后在dealloc中移除通知 和結(jié)束設(shè)備旋轉(zhuǎn)的通知
- (void)dealloc{
    [[NSNotificationCenter defaultCenter]removeObserver:self];
    [[UIDevice currentDevice]endGeneratingDeviceOrientationNotifications];
}

- (BOOL)shouldAutorotate {
    return NO;
}

- (BOOL)prefersStatusBarHidden {
    if (@available(iOS 13.0, *)) {
        return self.isFullScreen;
    }
    return NO;
}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations {
    
    return UIInterfaceOrientationMaskPortrait|UIInterfaceOrientationMaskLandscapeLeft|UIInterfaceOrientationMaskLandscapeRight;
}



#pragma mark - private method

- (void)fullScreenAction:(UIButton *)sender {
    
    if (self.isFullScreen) {//如果是全屏，點(diǎn)擊按鈕進(jìn)入小屏狀態(tài)
        [self changeToOriginalFrame];
    } else {//不是全屏骤素，點(diǎn)擊按鈕進(jìn)入全屏狀態(tài)
        [self changeToFullScreen];
    }
    
}

- (void)changeToOriginalFrame {
    
    if (!self.isFullScreen) {
        return;
    }

    [UIView animateWithDuration:AnimationDuration animations:^{
        
        
        [self interfaceOrientation:UIInterfaceOrientationPortrait];
        self.playerView.frame = self.playerFrame;
        
    } completion:^(BOOL finished) {
        
        [self.playerView removeFromSuperview];
        
        [self.playerSuperView addSubview:self.playerView];
        self.isFullScreen = NO;
        //調(diào)用以下方法后先壕，系統(tǒng)會(huì)在合適的時(shí)間調(diào)用prefersStatusBarHidden方法，控制狀態(tài)欄的顯示和隱藏谆甜，可根據(jù)自己的產(chǎn)品控制顯示邏輯
        [self setNeedsStatusBarAppearanceUpdate];
    }];
    
}

- (void)changeToFullScreen {
    if (self.isFullScreen) {
        return;
    }
    
    //記錄播放器視圖的父視圖和原始frame值,在實(shí)際項(xiàng)目中垃僚，可能會(huì)嵌套子視圖，所以播放器的superView有可能不是self.view规辱，所以需要記錄父視圖
    self.playerSuperView = self.playerView.superview;
    self.playerFrame = self.playerView.frame;
    
    CGRect rectInWindow = [self.playerView convertRect:self.playerView.bounds toView:self.mainWindow];
    [self.playerView removeFromSuperview];
    
    self.playerView.frame = rectInWindow;
    [self.mainWindow addSubview:self.playerView];
    
    //執(zhí)行旋轉(zhuǎn)動(dòng)畫
    [UIView animateWithDuration:AnimationDuration animations:^{
        
        UIDeviceOrientation orientation = [UIDevice currentDevice].orientation;
        if (orientation == UIDeviceOrientationLandscapeRight) {
            [self interfaceOrientation:UIInterfaceOrientationLandscapeLeft];
        } else {
            [self interfaceOrientation:UIInterfaceOrientationLandscapeRight];
        }
        
        self.playerView.bounds = CGRectMake(0, 0, CGRectGetHeight(self.mainWindow.bounds), CGRectGetWidth(self.mainWindow.bounds));
        self.playerView.center = CGPointMake(CGRectGetMidX(self.mainWindow.bounds), CGRectGetMidY(self.mainWindow.bounds));
        
    } completion:^(BOOL finished) {
       
        self.isFullScreen = YES;
        //調(diào)用以下方法后谆棺，系統(tǒng)會(huì)在合適的時(shí)間調(diào)用prefersStatusBarHidden方法，控制狀態(tài)欄的顯示和隱藏罕袋，可根據(jù)自己的產(chǎn)品控制顯示邏輯
        [self setNeedsStatusBarAppearanceUpdate];
    }];
}

- (void)interfaceOrientation:(UIInterfaceOrientation)orientation {
    if (orientation == UIInterfaceOrientationLandscapeRight || orientation == UIInterfaceOrientationLandscapeLeft) {
        // 設(shè)置橫屏
        [self setOrientationLandscapeConstraint:orientation];
    } else if (orientation == UIInterfaceOrientationPortrait) {
        // 設(shè)置豎屏
        [self setOrientationPortraitConstraint];
    }
}

- (void)setOrientationLandscapeConstraint:(UIInterfaceOrientation)orientation {
    
    [self toOrientation:orientation];
}

- (void)setOrientationPortraitConstraint {
    
    [self toOrientation:UIInterfaceOrientationPortrait];
}

- (void)toOrientation:(UIInterfaceOrientation)orientation {
    // 獲取到當(dāng)前狀態(tài)條的方向------iOS13已經(jīng)廢棄改淑，所以不能根據(jù)狀態(tài)欄的方向判斷是否旋轉(zhuǎn)，手動(dòng)記錄最后一次的旋轉(zhuǎn)方向
//    UIInterfaceOrientation currentOrientation = [UIApplication sharedApplication].statusBarOrientation;
    // 判斷如果當(dāng)前方向和要旋轉(zhuǎn)的方向一致,那么不做任何操作
    if (self.lastInterfaceOrientation == orientation) { return; }
    
    if (@available(iOS 13.0, *)) {
        //iOS 13已經(jīng)將setStatusBarOrientation廢棄浴讯，調(diào)用此方法無(wú)效
    } else {
        [[UIApplication sharedApplication] setStatusBarOrientation:orientation animated:NO];
    }
    self.lastInterfaceOrientation = orientation;
    
    // 獲取旋轉(zhuǎn)狀態(tài)條需要的時(shí)間:
    
    [UIView animateWithDuration:AnimationDuration animations:^{
        // 更改了狀態(tài)條的方向,但是設(shè)備方向UIInterfaceOrientation還是正方向的,這就要設(shè)置給你播放視頻的視圖的方向設(shè)置旋轉(zhuǎn)
        // 給你的播放視頻的view視圖設(shè)置旋轉(zhuǎn)
        self.playerView.transform = CGAffineTransformIdentity;
        self.playerView.transform = [self getTransformRotationAngleWithOrientation:self.lastInterfaceOrientation];
        // 開(kāi)始旋轉(zhuǎn)
    } completion:^(BOOL finished) {
        
    }];
}

- (CGAffineTransform)getTransformRotationAngleWithOrientation:(UIInterfaceOrientation)orientation {

    // 根據(jù)要進(jìn)行旋轉(zhuǎn)的方向來(lái)計(jì)算旋轉(zhuǎn)的角度
    if (orientation == UIInterfaceOrientationPortrait) {
        return CGAffineTransformIdentity;
    } else if (orientation == UIInterfaceOrientationLandscapeLeft){
        return CGAffineTransformMakeRotation(-M_PI_2);
    } else if(orientation == UIInterfaceOrientationLandscapeRight){
        return CGAffineTransformMakeRotation(M_PI_2);
    }
    return CGAffineTransformIdentity;
}

#pragma mark - setter

- (void)setIsFullScreen:(BOOL)isFullScreen {
    _isFullScreen = isFullScreen;
    [self.btnFullScreen setTitle:isFullScreen?@"退出全屏":@"全屏" forState:UIControlStateNormal];
}

#pragma mark - getter

- (UIView *)playerView {
    if (!_playerView) {
        _playerView = [[UIView alloc]init];
        _playerView.backgroundColor = [UIColor redColor];
        
        if (@available(iOS 11.0, *)) {
            _playerView.frame = CGRectMake(0, self.view.safeAreaInsets.top, CGRectGetWidth(self.view.bounds), CGRectGetWidth(self.view.bounds) * 9 / 16.f);
        } else {
            _playerView.frame = CGRectMake(0, 0, CGRectGetWidth(self.view.bounds), CGRectGetWidth(self.view.bounds) * 9 / 16.f);
        }
        
    }
    return _playerView;
}

- (UIButton *)btnFullScreen {
    if (!_btnFullScreen) {
        _btnFullScreen = [UIButton buttonWithType:UIButtonTypeCustom];
        [_btnFullScreen setTitle:@"全屏" forState:UIControlStateNormal];
        _btnFullScreen.backgroundColor = [UIColor orangeColor];
        [_btnFullScreen addTarget:self action:@selector(fullScreenAction:) forControlEvents:UIControlEventTouchUpInside];
        _btnFullScreen.frame = CGRectMake(50, 80, 150, 50);
    }
    return _btnFullScreen;
}

- (UIWindow *)mainWindow {
    if (!_mainWindow) {
        if (@available(iOS 13.0, *)) {
            _mainWindow = [UIApplication sharedApplication].windows.firstObject;
        } else {
            _mainWindow = [UIApplication sharedApplication].keyWindow;
        }
    }
    return _mainWindow;
}

@end

結(jié)尾

如果你的rootViewController是UIViewController的話朵夏，那么用上面的代碼實(shí)現(xiàn)全屏效果沒(méi)有問(wèn)題，如果你的rootViewController是UINavigationController或者UITabBarController的話榆纽，那么還要增加兩個(gè)分類文件仰猖。文件內(nèi)容如下：

一、定義分類UINavigationController+Rotation.h

@implementation UINavigationController (Rotation)

- (BOOL)shouldAutorotate {
    return [self.topViewController shouldAutorotate];
}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations {
    return [self.topViewController supportedInterfaceOrientations];
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
    return [self.topViewController preferredInterfaceOrientationForPresentation];
}

二奈籽、定義分類UITabBarController+Rotation.h

@implementation UITabBarController (Rotation)

- (BOOL)shouldAutorotate {
    return [self.selectedViewController shouldAutorotate];
}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations {
    return [self.selectedViewController supportedInterfaceOrientations];
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
    return [self.selectedViewController preferredInterfaceOrientationForPresentation];
}

Demo地址：https://github.com/latacat/iOS_Demos.git