搞透AVPlayerViewController,摆出我想要的姿势

有那么一些时候，我们只需要简单的播放一些小视频，本地的或者网上的资源，不需要各种炫酷的效果，不需要自己各种控制，只是想安安静静的播放完，退出！网上各种开源的封装的AVPlayer的开源库，各有千秋，但是集成进来有感觉动静太大了，大把大把的控件和控制代理等等，头都大了！对于我这种菜逼，慌得一批~~所以我就在系统提供的AVPlayerViewController动起了手脚！

AVPlayerViewController的最简单使用

#import "ViewController.h"
#import 
  
    

@interface ViewController ()
@property (nonatomic, strong) NSString *videoUrl;
@property (nonatomic, strong)AVPlayerViewController *playerVC;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
//    self.videoUrl =  [[NSBundle mainBundle] pathForResource:@"guideMovie1" ofType:@"mov"];
    self.videoUrl = @"http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4";
    /*
     因为是 http 的链接，所以要去 info.plist里面设置
     App Transport Security Settings
     Allow Arbitrary Loads  = YES
     */
    self.playerVC = [[AVPlayerViewController alloc] init];
    self.playerVC.player = [AVPlayer playerWithURL:[self.videoUrl hasPrefix:@"http"] ? [NSURL URLWithString:self.videoUrl]:[NSURL fileURLWithPath:self.videoUrl]];
    self.playerVC.view.frame = self.view.bounds;
    self.playerVC.showsPlaybackControls = YES;
//self.playerVC.entersFullScreenWhenPlaybackBegins = YES;//开启这个播放的时候支持（全屏）横竖屏哦
//self.playerVC.exitsFullScreenWhenPlaybackEnds = YES;//开启这个所有 item 播放完毕可以退出全屏
    [self.view addSubview:self.playerVC.view];

    if (self.playerVC.readyForDisplay) {
        [self.playerVC.player play];
    }
}
@end

就是这么简单，我们就可以播放网络或者本地视频啦，简洁大气上档次，还是暗黑风格哦，如果项目开启了屏幕方向，自动支持横竖屏切换， 美滋滋！上两张图来占占篇幅哈！！

简单播放竖屏界面

简单播放横屏界面

当是，但是！我们有没有发现，它没有退出按钮，这叫我如何退出呢！这怎么难倒我，加个导航控制器嵌套，so easy~~这时候你又会发现，播放界面的按钮被盖住了（肯定有人会说，进来的时候设置导航栏隐藏就好啦，然后播放完显示导航栏不就好了。。。）接着往下看

拉伸和音量按钮被遮挡了

那么我们来监听播放状态来控制导航栏的显示和隐藏吧！

我们在viewDidload里面增加这个监听,这个 block 监听方式是我学习各位大神写的一个分类，不必自己释放 observer

//添加监听播放状态
    [self HF_addNotificationForName:AVPlayerItemDidPlayToEndTimeNotification block:^(NSNotification *notification) {
        NSLog(@"我播放结束了！");
        [self.navigationController setNavigationBarHidden:NO animated:YES];
    }];

    if (self.playerVC.readyForDisplay) {
        [self.playerVC.player play];
    }

在viewDidAppear里面隐藏导航栏

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    [self.navigationController setNavigationBarHidden:YES animated:YES];
}

这样看起来蛮不错的，达到我们预期效果了，就是进去隐藏导航栏，播放结束显示导航栏！

但是这个视频短，如果是很长的怎么办？等到看完才可以退出么，那就太坑爹了，有木有！辣么有没有机制监听到AVPlayerViewController点击播放界面显示 工具 栏的时候一并显示导航栏呢？这时候就要借助著名的AOP框架Aspects了!在做这件事之前，我们先看下AVPlayerViewController的视图层级和手势数组了！

首先看下面一张图，好好利用视图层级分析器，可以看透很多东西的实现原理哦！

视图层级和手势数组

而下面这张图是我们需要监听的音量控制的层级图

音量控制的层级图

从上图，我们可以知道单击和双击手势是添加到了AVPlayerViewControllerContentView上，那我们怎么拦截它做事情呢？接下来看我的：

#import "ViewController.h"
#import 
  
    
#import "NSObject+BlockObserver.h"
#import 
  
    

@interface ViewController ()
@property (nonatomic, strong) NSString *videoUrl;
@property (nonatomic, strong)AVPlayerViewController *playerVC;

//增加两个属性先
//记录音量控制的父控件，控制它隐藏显示的 view
@property (nonatomic, weak)UIView *volumeSuperView;
//记录我们 hook 的对象信息
@property (nonatomic, strong)id

  
   
 hookAVPlaySingleTap;
 
   

 
   @end
 
   


  

先增加两个属性，用来记录我们需要操作的 view 和 hook 的对象信息！然后在viewDidload里面增加以下代码：

//首先获取我们的手势真正的执行类 UIGestureRecognizerTarget
//然后手势触发的方法 selector 为：_sendActionWithGestureRecognizer:
Class UIGestureRecognizerTarget = NSClassFromString(@"UIGestureRecognizerTarget");
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wundeclared-selector"
    _hookAVPlaySingleTap = [UIGestureRecognizerTarget aspect_hookSelector:@selector(_sendActionWithGestureRecognizer:) withOptions:AspectPositionBefore usingBlock:^(id

  
   
 info,
 
   UIGestureRecognizer *gest){
 
   
        
 
   if (gest.numberOfTouches == 
 
   1) {
 
   
            
 
   //AVVolumeButtonControl
 
   
            
 
   if (!
 
   self.volumeSuperView) {
 
   
                
 
   UIView *view = [gest.view findViewByClassName:
 
   @"AVVolumeButtonControl"];
 
   
                
 
   if (view) {
 
   
                    
 
   while (view.superview) {
 
   
                        view = view.superview;
 
   
                        
 
   if ([view isKindOfClass:[
 
   NSClassFromString(
 
   @"AVTouchIgnoringView") 
 
   class]]) {
 
   
                            
 
   self.volumeSuperView = view;
 
   
                          
 
   //  [view addObserver:self forKeyPath:@"hidden" options:NSKeyValueObservingOptionNew|NSKeyValueObservingOptionOld context:nil];
 
   
                           [view HF_addObserverForKeyPath:
 
   @"hidden" block:^(__
 
   weak 
 
   id object, 
 
   id oldValue, 
 
   id newValue) {
 
   
                                
 
   NSLog(
 
   @"newValue ==%@",newValue);
 
   
                                
 
   BOOL isHidden = [(
 
   NSNumber *)newValue boolValue];
 
   //记得要转换哦，不然没效果！
 
   
                                
 
   dispatch_async(dispatch_get_main_queue(), ^{
 
   
                                    [
 
   self.navigationController setNavigationBarHidden:isHidden animated:
 
   YES];
 
   
                                });
 
   
                        }
 
   
                    }
 
   
                }
 
   
            }
 
   
        }
 
   

 
   
    } error:
 
   nil];
 
   

 
   #pragma clang diagnostic pop
 
   
   
 
   if (
 
   self.playerVC.readyForDisplay) {
 
   
        [
 
   self.playerVC.player play];
 
   
    }
 
   


  

其中[gest.view findViewByClassName:@"AVVolumeButtonControl"]方法的实现如下：

- (UIView *)findViewByClassName:(NSString *)className
{
    UIView *view;
    if ([NSStringFromClass(self.class) isEqualToString:className]) {
        return self;
    } else {
        for (UIView *child in self.subviews) {
            view = [child findViewByClassName:className];
            if (view != nil) break;
        }
    }
    return view;
}

设置完，我们需要在 viewDidDisappear里面去释放我们 hook 的对象，防止反复添加 hook 和引用的问题!

- (void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
    [self.navigationController setNavigationBarHidden:NO animated:YES];
    [self.hookAVPlaySingleTap remove];
}

完事，我们来验证一下！看看能不能达到我们的预期效果，点击播放界面，实现播放工具栏和导航栏的同步显示隐藏!我们可以预览一下效果：

hidden.gif

当然，我能写出来，就说明我验证过啦！不过，在这个基础上，我肯定是想做的更自然一点点，更高大上一点点啦！所以我会自定义一个控件添加到播放控制器的 view 上，同一风格，做到真正的全屏播放，抛弃导航栏！因此，我们需要再添加一个控件属性

//增加一个关闭按钮
@property (nonatomic, strong) UIControl *closeControl;

//懒加载
- (UIControl *)closeControl
{
    if (!_closeControl) {
        _closeControl = [[UIControl alloc] init];
        [_closeControl addTarget:self action:@selector(dimissSelf) forControlEvents:UIControlEventTouchUpInside];
        _closeControl.backgroundColor = [UIColor colorWithRed:0.14 green:0.14 blue:0.14 alpha:0.8];
        _closeControl.tintColor = [UIColor colorWithWhite:1 alpha:0.55];
        NSBundle *bundle = [NSBundle bundleForClass:[self class]];
        UIImage *normalImage = [UIImage imageNamed:@"closeAV" inBundle:bundle compatibleWithTraitCollection:nil];
        [_closeControl.layer setContents:(id)normalImage.CGImage];
        _closeControl.layer.contentsGravity = kCAGravityCenter;
        _closeControl.layer.cornerRadius = 17;
        _closeControl.layer.masksToBounds = YES;
    }
    return _closeControl;

}

- (void)dimissSelf
{
    if (self.navigationController.viewControllers.count >1) {
        [self.navigationController popViewControllerAnimated:YES];
    }
    else
    {
        [self dismissViewControllerAnimated:YES completion:nil];
    }

}

然后在viewDidLoad里面修改代码如下，主要是注释掉导航栏显示和隐藏的代码:

- (void)viewDidLoad {
    [super viewDidLoad];
//    self.videoUrl =  [[NSBundle mainBundle] pathForResource:@"guideMovie1" ofType:@"mov"];
    self.videoUrl = @"http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4";
    /*
     因为是 http 的链接，所以要去 info.plist里面设置
     App Transport Security Settings
     Allow Arbitrary Loads  = YES
     */
    self.playerVC = [[AVPlayerViewController alloc] init];
    self.playerVC.player = [AVPlayer playerWithURL:[self.videoUrl hasPrefix:@"http"] ? [NSURL URLWithString:self.videoUrl]:[NSURL fileURLWithPath:self.videoUrl]];
    self.playerVC.view.frame = self.view.bounds;
    self.playerVC.showsPlaybackControls = YES;
    //self.playerVC.entersFullScreenWhenPlaybackBegins = YES;//开启这个播放的时候支持（全屏）横竖屏哦
    //self.playerVC.exitsFullScreenWhenPlaybackEnds = YES;//开启这个所有 item 播放完毕可以退出全屏
    [self.view addSubview:self.playerVC.view];


    //添加监听播放状态
    [self HF_addNotificationForName:AVPlayerItemDidPlayToEndTimeNotification block:^(NSNotification *notification) {
        NSLog(@"我播放结束了！");
//        [self.navigationController setNavigationBarHidden:NO animated:YES];
    }];


    Class UIGestureRecognizerTarget = NSClassFromString(@"UIGestureRecognizerTarget");
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wundeclared-selector"
    _hookAVPlaySingleTap = [UIGestureRecognizerTarget aspect_hookSelector:@selector(_sendActionWithGestureRecognizer:) withOptions:AspectPositionBefore usingBlock:^(id

  
   
 info,
 
   UIGestureRecognizer *gest){
 
   
        
 
   if (gest.numberOfTouches == 
 
   1) {
 
   
            
 
   //AVVolumeButtonControl
 
   
            
 
   if (!
 
   self.volumeSuperView) {
 
   
                
 
   UIView *view = [gest.view findViewByClassName:
 
   @"AVVolumeButtonControl"];
 
   
                
 
   if (view) {
 
   
                    
 
   while (view.superview) {
 
   
                        view = view.superview;
 
   
                        
 
   if ([view isKindOfClass:[
 
   NSClassFromString(
 
   @"AVTouchIgnoringView") 
 
   class]]) {
 
   
                            
 
   self.volumeSuperView = view;
 
   

 
   //                            [view addObserver:self forKeyPath:@"hidden" options:NSKeyValueObservingOptionNew|NSKeyValueObservingOptionOld context:nil];
 
   
                            [view HF_addObserverForKeyPath:
 
   @"hidden" block:^(__
 
   weak 
 
   id object, 
 
   id oldValue, 
 
   id newValue) {
 
   
                                
 
   NSLog(
 
   @"newValue ==%@",newValue);
 
   
                                
 
   BOOL isHidden = [(
 
   NSNumber *)newValue boolValue];
 
   
                                
 
   dispatch_async(dispatch_get_main_queue(), ^{
 
   

 
   //                                    [self.navigationController setNavigationBarHidden:isHidden animated:YES];
 
   
                                    [
 
   self.closeControl setHidden:isHidden];
 
   
                                });
 
   

 
   
                            }];
 
   
                            
 
   break;
 
   
                        }
 
   
                    }
 
   
                }
 
   
            }
 
   
        }
 
   

 
   
    } error:
 
   nil];
 
   

 
   #pragma clang diagnostic pop
 
   
    
 
   //这里必须监听到准备好开始播放了，才把按钮添加上去（系统控件的懒加载机制，我们才能获取到合适的 view 去添加），不然很突兀！
 
   
    [
 
   self.playerVC.player HF_addObserverForKeyPath:
 
   @"status" block:^(__
 
   weak 
 
   id object, 
 
   id oldValue, 
 
   id newValue) {
 
   
        
 
   AVPlayerStatus status = [newValue integerValue];
 
   
        
 
   if (status == 
 
   AVPlayerStatusReadyToPlay) {
 
   
            
 
   UIView *avTouchIgnoringView = 
 
   self->_playerVC.view;
 
   
            [avTouchIgnoringView addSubview:
 
   self.closeControl];
 
   
    
 
   //这里判断是否刘海屏，不同机型的放置位置不一样！
 
   
            
 
   BOOL ishairScreen = [
 
   self.view isHairScreen];
 
   
            
 
   CGFloat margin = ishairScreen ?
 
   90:
 
   69;
 
   
            [
 
   self.closeControl mas_makeConstraints:^(MASConstraintMaker *make) {
 
   
                make.right.mas_equalTo(avTouchIgnoringView).offset(-margin);
 
   
                make.top.mas_equalTo(avTouchIgnoringView).offset(ishairScreen ?
 
   27:
 
   6);
 
   
                make.width.mas_equalTo(
 
   60);
 
   
                make.height.mas_equalTo(
 
   47);
 
   
            }];
 
   
            [avTouchIgnoringView setNeedsLayout];
 
   
        }
 
   
    }];
 
   

 
   
    
 
   if (
 
   self.playerVC.readyForDisplay) {
 
   
        [
 
   self.playerVC.player play];
 
   
    }
 
   

 
   
}
 
   

 
   

 
   //别忘了释放资源
 
   
- (
 
   void)dealloc
 
   
{
 
   
    
 
   self.playerVC = 
 
   nil;
 
   
}
 
   


  

来来来，上图：

close按钮和原生工具栏同步显示和隐藏

至此，大功告成了，不过同步显示和隐藏过程需要大家自己去摸索合适的动画了，我总是踏不准点！当然，横竖屏和强制横屏的方案我这里也大概提一下吧，主要思路是监听屏幕的旋转通知：

//获取设备旋转方向的通知,即使关闭了自动旋转,一样可以监测到设备的旋转方向
        [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
        //旋转屏幕通知
        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(onDeviceOrientationChange:)
                                                     name:UIDeviceOrientationDidChangeNotification
                                                   object:nil
         ];

/**
 *  旋转屏幕通知
 */
- (void)onDeviceOrientationChange:(NSNotification *)notification{

    UIDeviceOrientation orientation = [UIDevice currentDevice].orientation;
    UIInterfaceOrientation interfaceOrientation = (UIInterfaceOrientation)orientation;
    switch (interfaceOrientation) {
        case UIInterfaceOrientationPortraitUpsideDown:{

        }
            break;
        case UIInterfaceOrientationPortrait:
            [self changeOrientation:UIInterfaceOrientationPortrait];
        }
            break;
        case UIInterfaceOrientationLandscapeLeft:
            [self changeOrientation:UIInterfaceOrientationLandscapeLeft];
        }
            break;
        case UIInterfaceOrientationLandscapeRight:{
            [self changeOrientation:UIInterfaceOrientationLandscapeRight];
        }
            break;
        default:
            break;
    }
}

-(void)changeOrientation:(UIInterfaceOrientation)orientation{
    if (orientation == UIInterfaceOrientationPortrait) {
        [self setNeedsStatusBarAppearanceUpdate];
        [self forceOrientationPortrait];

    }else{
        [self setNeedsStatusBarAppearanceUpdate];
        [self forceOrientationLandscape];
    }

    if (@available(iOS 11.0, *)) {
        [self setNeedsUpdateOfHomeIndicatorAutoHidden];
    }
    //刷新
    [UIViewController attemptRotationToDeviceOrientation];
}

//强制横屏
- (void)forceOrientationLandscape
{
      [[UIApplication sharedApplication].delegate.isForceLandscape = YES;
      [[UIApplication sharedApplication].delegate.isForcePortrait = NO;
      [[UIApplication sharedApplication].delegate  application:[UIApplication sharedApplication] supportedInterfaceOrientationsForWindow:self.view.window];
}

//强制竖屏
- (void)forceOrientationPortrait
{

     [[UIApplication sharedApplication].delegate.isForceLandscape = NO;
     [[UIApplication sharedApplication].delegate.isForcePortrait = YES;
     [[UIApplication sharedApplication].delegate application:[UIApplication sharedApplication] supportedInterfaceOrientationsForWindow:self.view.window];
}

作者：红发_KVO
链接：https://www.jianshu.com/p/63e038c73e7d
來源：简书
简书著作权归作者所有，任何形式的转载都请联系作者获得授权并注明出处。

在 AppDelegate.h 里面添加以下属性

#import 
  
    

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;
//添加旋转需要的属性
@property (nonatomic, assign) BOOL isForceLandscape;
@property (nonatomic, assign) BOOL isForcePortrait;
@end

在 AppDelegate.m 里面实现以下方法

-(UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window{
    if (self.isForceLandscape) {
        return UIInterfaceOrientationMaskLandscape;
    }else if (self.isForcePortrait){
        return UIInterfaceOrientationMaskPortrait;
    }
    return UIInterfaceOrientationMaskPortrait;
}

今天的小菜逼装完了，总感觉自己在这个行业里瑟瑟发抖，找不到上岸的路！

demo地址

作者：红发_KVO

链接：https://www.jianshu.com/p/63e038c73e7d