短视频app开发，点击视频进行全屏播放

短视频app开发，点击视频进行全屏播放的相关代码

#import "VideoFullScreenController.h"<br>static CGFloat AnimationDuration = 0.3;//旋转动画执行时间<br>@interface VideoFullScreenController ()<br>@property (nonatomic, nullable, strong) UIView *playerView;//播放器视图<br>@property (nonatomic, nullable, strong) UIButton *btnFullScreen;<br>@property (nonatomic, nullable, strong) UIView *playerSuperView;//记录播放器父视图<br>@property (nonatomic, assign) CGRect playerFrame;//记录播放器原始frame<br>@property (nonatomic, assign) BOOL isFullScreen;//记录是否全屏<br>@property (nonatomic, assign) UIInterfaceOrientation lastInterfaceOrientation;<br>@property (nonatomic, nullable, strong) UIWindow *mainWindow;<br>@end<br>@implementation VideoFullScreenController<br>- (void)viewDidLoad {<br>    [super viewDidLoad];<br>    [self.playerView addSubview:self.btnFullScreen];<br>    [self.view addSubview:self.playerView];<br>    <br>    if (@available(iOS 13.0, *)) {<br>        _lastInterfaceOrientation = [UIApplication sharedApplication].windows.firstObject.windowScene.interfaceOrientation;<br>    } else {<br>        _lastInterfaceOrientation = [UIApplication sharedApplication].statusBarOrientation;<br>    }<br>    //开启和监听 设备旋转的通知<br>    if (![UIDevice currentDevice].generatesDeviceOrientationNotifications) {<br>        [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];<br>    }<br>    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(handleDeviceOrientationChange:)<br>                                                name:UIDeviceOrientationDidChangeNotification object:nil];<br>}<br>//设备方向改变的处理<br>- (void)handleDeviceOrientationChange:(NSNotification *)notification{<br>    UIDeviceOrientation deviceOrientation = [UIDevice currentDevice].orientation;<br>    switch (deviceOrientation) {<br>        case UIDeviceOrientationFaceUp:<br>            NSLog(@"屏幕朝上平躺");<br>            break;<br>        case UIDeviceOrientationFaceDown:<br>            NSLog(@"屏幕朝下平躺");<br>            break;<br>        case UIDeviceOrientationUnknown:<br>            NSLog(@"未知方向");<br>            break;<br>        case UIDeviceOrientationLandscapeLeft:<br>            if (self.isFullScreen) {<br>                [self interfaceOrientation:UIInterfaceOrientationLandscapeRight];<br>            }<br>            <br>            NSLog(@"屏幕向左横置");<br>            break;<br>        case UIDeviceOrientationLandscapeRight:<br>            if (self.isFullScreen) {<br>                [self interfaceOrientation:UIInterfaceOrientationLandscapeLeft];<br>            }<br>            <br>            NSLog(@"屏幕向右橫置");<br>            break;<br>        case UIDeviceOrientationPortrait:<br>            NSLog(@"屏幕直立");<br>            break;<br>        case UIDeviceOrientationPortraitUpsideDown:<br>            NSLog(@"屏幕直立，上下顛倒");<br>            break;<br>        default:<br>            NSLog(@"无法辨识");<br>            break;<br>    }<br>}<br>//最后在dealloc中移除通知 和结束设备旋转的通知<br>- (void)dealloc{<br>    [[NSNotificationCenter defaultCenter]removeObserver:self];<br>    [[UIDevice currentDevice]endGeneratingDeviceOrientationNotifications];<br>}<br>- (BOOL)shouldAutorotate {<br>    return NO;<br>}<br>- (BOOL)prefersStatusBarHidden {<br>    if (@available(iOS 13.0, *)) {<br>        return self.isFullScreen;<br>    }<br>    return NO;<br>}<br>- (UIInterfaceOrientationMask)supportedInterfaceOrientations {<br>    <br>    return UIInterfaceOrientationMaskPortrait|UIInterfaceOrientationMaskLandscapeLeft|UIInterfaceOrientationMaskLandscapeRight;<br>}<br>#pragma mark - private method<br>- (void)fullScreenAction:(UIButton *)sender {<br>    <br>    if (self.isFullScreen) {//如果是全屏，点击按钮进入小屏状态<br>        [self changeToOriginalFrame];<br>    } else {//不是全屏，点击按钮进入全屏状态<br>        [self changeToFullScreen];<br>    }<br>    <br>}<br>- (void)changeToOriginalFrame {<br>    <br>    if (!self.isFullScreen) {<br>        return;<br>    }<br>    [UIView animateWithDuration:AnimationDuration animations:^{<br>        <br>        <br>        [self interfaceOrientation:UIInterfaceOrientationPortrait];<br>        self.playerView.frame = self.playerFrame;<br>        <br>    } completion:^(BOOL finished) {<br>        <br>        [self.playerView removeFromSuperview];<br>        <br>        [self.playerSuperView addSubview:self.playerView];<br>        self.isFullScreen = NO;<br>        //调用以下方法后，系统会在合适的时间调用prefersStatusBarHidden方法，控制状态栏的显示和隐藏，可根据自己的产品控制显示逻辑<br>        [self setNeedsStatusBarAppearanceUpdate];<br>    }];<br>    <br>}<br>- (void)changeToFullScreen {<br>    if (self.isFullScreen) {<br>        return;<br>    }<br>    <br>    //记录播放器视图的父视图和原始frame值,在实际项目中，可能会嵌套子视图，所以播放器的superView有可能不是self.view，所以需要记录父视图<br>    self.playerSuperView = self.playerView.superview;<br>    self.playerFrame = self.playerView.frame;<br>    <br>    CGRect rectInWindow = [self.playerView convertRect:self.playerView.bounds toView:self.mainWindow];<br>    [self.playerView removeFromSuperview];<br>    <br>    self.playerView.frame = rectInWindow;<br>    [self.mainWindow addSubview:self.playerView];<br>    <br>    //执行旋转动画<br>    [UIView animateWithDuration:AnimationDuration animations:^{<br>        <br>        UIDeviceOrientation orientation = [UIDevice currentDevice].orientation;<br>        if (orientation == UIDeviceOrientationLandscapeRight) {<br>            [self interfaceOrientation:UIInterfaceOrientationLandscapeLeft];<br>        } else {<br>            [self interfaceOrientation:UIInterfaceOrientationLandscapeRight];<br>        }<br>        <br>        self.playerView.bounds = CGRectMake(0, 0, CGRectGetHeight(self.mainWindow.bounds), CGRectGetWidth(self.mainWindow.bounds));<br>        self.playerView.center = CGPointMake(CGRectGetMidX(self.mainWindow.bounds), CGRectGetMidY(self.mainWindow.bounds));<br>        <br>    } completion:^(BOOL finished) {<br>       <br>        self.isFullScreen = YES;<br>        //调用以下方法后，系统会在合适的时间调用prefersStatusBarHidden方法，控制状态栏的显示和隐藏，可根据自己的产品控制显示逻辑<br>        [self setNeedsStatusBarAppearanceUpdate];<br>    }];<br>}<br>- (void)interfaceOrientation:(UIInterfaceOrientation)orientation {<br>    if (orientation == UIInterfaceOrientationLandscapeRight || orientation == UIInterfaceOrientationLandscapeLeft) {<br>        // 设置横屏<br>        [self setOrientationLandscapeConstraint:orientation];<br>    } else if (orientation == UIInterfaceOrientationPortrait) {<br>        // 设置竖屏<br>        [self setOrientationPortraitConstraint];<br>    }<br>}<br>- (void)setOrientationLandscapeConstraint:(UIInterfaceOrientation)orientation {<br>    <br>    [self toOrientation:orientation];<br>}<br>- (void)setOrientationPortraitConstraint {<br>    <br>    [self toOrientation:UIInterfaceOrientationPortrait];<br>}<br>- (void)toOrientation:(UIInterfaceOrientation)orientation {<br>    // 获取到当前状态条的方向------iOS13已经废弃，所以不能根据状态栏的方向判断是否旋转，手动记录最后一次的旋转方向<br>//    UIInterfaceOrientation currentOrientation = [UIApplication sharedApplication].statusBarOrientation;<br>    // 判断如果当前方向和要旋转的方向一致,那么不做任何操作<br>    if (self.lastInterfaceOrientation == orientation) { return; }<br>    <br>    if (@available(iOS 13.0, *)) {<br>        //iOS 13已经将setStatusBarOrientation废弃，调用此方法无效<br>    } else {<br>        [[UIApplication sharedApplication] setStatusBarOrientation:orientation animated:NO];<br>    }<br>    self.lastInterfaceOrientation = orientation;<br>    <br>    // 获取旋转状态条需要的时间:<br>    <br>    [UIView animateWithDuration:AnimationDuration animations:^{<br>        // 更改了状态条的方向,但是设备方向UIInterfaceOrientation还是正方向的,这就要设置给你播放视频的视图的方向设置旋转<br>        // 给你的播放视频的view视图设置旋转<br>        self.playerView.transform = CGAffineTransformIdentity;<br>        self.playerView.transform = [self getTransformRotationAngleWithOrientation:self.lastInterfaceOrientation];<br>        // 开始旋转<br>    } completion:^(BOOL finished) {<br>        <br>    }];<br>}<br>- (CGAffineTransform)getTransformRotationAngleWithOrientation:(UIInterfaceOrientation)orientation {<br>    // 根据要进行旋转的方向来计算旋转的角度<br>    if (orientation == UIInterfaceOrientationPortrait) {<br>        return CGAffineTransformIdentity;<br>    } else if (orientation == UIInterfaceOrientationLandscapeLeft){<br>        return CGAffineTransformMakeRotation(-M_PI_2);<br>    } else if(orientation == UIInterfaceOrientationLandscapeRight){<br>        return CGAffineTransformMakeRotation(M_PI_2);<br>    }<br>    return CGAffineTransformIdentity;<br>}<br>#pragma mark - setter<br>- (void)setIsFullScreen:(BOOL)isFullScreen {<br>    _isFullScreen = isFullScreen;<br>    [self.btnFullScreen setTitle:isFullScreen?@"退出全屏":@"全屏" forState:UIControlStateNormal];<br>}<br>#pragma mark - getter<br>- (UIView *)playerView {<br>    if (!_playerView) {<br>        _playerView = [[UIView alloc]init];<br>        _playerView.backgroundColor = [UIColor redColor];<br>        <br>        if (@available(iOS 11.0, *)) {<br>            _playerView.frame = CGRectMake(0, self.view.safeAreaInsets.top, CGRectGetWidth(self.view.bounds), CGRectGetWidth(self.view.bounds) * 9 / 16.f);<br>        } else {<br>            _playerView.frame = CGRectMake(0, 0, CGRectGetWidth(self.view.bounds), CGRectGetWidth(self.view.bounds) * 9 / 16.f);<br>        }<br>        <br>    }<br>    return _playerView;<br>}<br>- (UIButton *)btnFullScreen {<br>    if (!_btnFullScreen) {<br>        _btnFullScreen = [UIButton buttonWithType:UIButtonTypeCustom];<br>        [_btnFullScreen setTitle:@"全屏" forState:UIControlStateNormal];<br>        _btnFullScreen.backgroundColor = [UIColor orangeColor];<br>        [_btnFullScreen addTarget:self action:@selector(fullScreenAction:) forControlEvents:UIControlEventTouchUpInside];<br>        _btnFullScreen.frame = CGRectMake(50, 80, 150, 50);<br>    }<br>    return _btnFullScreen;<br>}<br>- (UIWindow *)mainWindow {<br>    if (!_mainWindow) {<br>        if (@available(iOS 13.0, *)) {<br>            _mainWindow = [UIApplication sharedApplication].windows.firstObject;<br>        } else {<br>            _mainWindow = [UIApplication sharedApplication].keyWindow;<br>        }<br>    }<br>    return _mainWindow;<br>}<br>@end

结尾

如果你的rootViewController是UIViewController的话，那么用上面的代码实现全屏效果没有问题，如果你的rootViewController是UINavigationController或者UITabBarController的话，那么还要增加两个分类文件。文件内容如下：

一、定义分类UINavigationController+Rotation.h

@implementation UINavigationController (Rotation)<br>- (BOOL)shouldAutorotate {<br>    return [self.topViewController shouldAutorotate];<br>}<br>- (UIInterfaceOrientationMask)supportedInterfaceOrientations {<br>    return [self.topViewController supportedInterfaceOrientations];<br>}<br>- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {<br>    return [self.topViewController preferredInterfaceOrientationForPresentation];<br>}

二、定义分类UITabBarController+Rotation.h

@implementation UITabBarController (Rotation)<br>- (BOOL)shouldAutorotate {<br>    return [self.selectedViewController shouldAutorotate];<br>}<br>- (UIInterfaceOrientationMask)supportedInterfaceOrientations {<br>    return [self.selectedViewController supportedInterfaceOrientations];<br>}<br>- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {<br>    return [self.selectedViewController preferredInterfaceOrientationForPresentation];<br>}

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