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 <AVKit/AVKit.h>
@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
但是，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 <AVKit/AVKit.h>
#import "NSObject+BlockObserver.h"
#import <Aspects/Aspects.h>
@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<AspectToken>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<AspectInfo>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<AspectInfo>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];
}
在 AppDelegate.h 里面添加以下属性
#import <UIKit/UIKit.h>
@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！
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