最近在学习AVFoundation框架的相关知识，写了一个基于AVPlayer的视频播放器，相关功能如下图：
代码github：https://github.com/wzpziyi1/VideoPlayer
AVFoundation都是围绕AVPlayer展开的，AVPlayer是一个用来播放基于时间的视听媒体的控制器对象。但它与我们通常理解的"控制器"不同，它不是一个视图或者窗口控制器，而是一个对播放和资源时间相关信息进行管理的对象，具体的用户界面是需要开发者自己进行编写的。
AVPlayer是一个不可见的组件，如果需要有可视化的界面，那么需要使用AVPlayerLayer类。AVPlayerLayer构建于Core Animation之上，它扩展了Core Animation的CALayer类，并通过框架在屏幕上显示视频内容（它只是用作视频内容的渲染面，其他可视化界面需要自己编写）。创建AVPlayerLayer需要一个指向AVPlayer实例的指针，这就可以将图层和播放器绑定在一起了，保证了当播放器基于时间的方法出现时使二者保持同步。
AVPlayerItem
它会建立媒体资源动态视角的数据模型，并保存AVPlayer在播放时的呈现状态。 例如seekToTime:方法：
__weak typeof(self) tmp = self;
[self.player seekToTime:CMTimeMakeWithSeconds(time, NSEC_PER_SEC) completionHandler:^(BOOL finished) {
if (finished)
{
tmp.transport.isFinishedJump = YES;
}
}];
//跳转到哪个时间点进行播放
AVPlayerItem有两个很重要的属性，一个是status，一个是loadedTimeRanges。使用kvo监听status属性值的改变，当status变为 AVPlayerStatusReadyToPlay的时候，表示可以开始播放了。而监听loadedTimeRanges属性，可以知道视频缓存到哪样一个时间点了：
//kvo
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *,id> *)change context:(void *)context
{
AVPlayerItem *item = (AVPlayerItem *)object;
if ([keyPath isEqualToString:@"status"])
{
NSLog(@"%d", (int)[item status]);
if ([item status] == AVPlayerStatusReadyToPlay)
{
[self monitorPlayingStatusWithItem:item];
}
}
else if ([keyPath isEqualToString:@"loadedTimeRanges"]) //缓冲
{
self.bufferTime = [self availableBufferTime];
if (!self.isFetchTotalDuration)
{
//获取视频总长度
NSTimeInterval totalDuration = CMTimeGetSeconds(item.duration);
self.transport.durationTime = totalDuration;
self.isFetchTotalDuration = YES;
}
if (self.transport.currentPlayTime <= self.transport.durationTime - 12)
{
//如果缓冲不够
if (self.bufferTime <= self.transport.currentPlayTime + 10)
{
self.transport.isBuffering = YES;
}
else
{
self.transport.isBuffering = NO;
}
}
else
{
self.transport.isBuffering = NO;
}
self.transport.currentBufferTime = self.bufferTime;
}
else
{
[super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
}
}在这段代码里面，我是设置了，如果当前播放时间+10s > 缓冲得到的总时间，那么就loading，直到缓冲时间总是大于当前播放时间10s，才开始播放。
CMTime
AVFoundation使用基于CMTime的数据结构来展示时间信息，它表现为分数值的方式，具体定义如下：
/*!
@typedef CMTime
@abstract Rational time value represented as int64/int32.
*/
typedef struct
{
CMTimeValue value; /*! @field value The value of the CMTime. value/timescale = seconds. */
CMTimeScale timescale; /*! @field timescale The timescale of the CMTime. value/timescale = seconds. */
CMTimeFlags flags; /*! @field flags The flags, eg. kCMTimeFlags_Valid, kCMTimeFlags_PositiveInfinity, etc. */
CMTimeEpoch epoch; /*! @field epoch Differentiates between equal timestamps that are actually different because
of looping, multi-item sequencing, etc.
Will be used during comparison: greater epochs happen after lesser ones.
Additions/subtraction is only possible within a single epoch,
however, since epoch length may be unknown/variable. */
} CMTime;在这个结构中，主要关注value和timescale，它们在时间呈现中分别作为分子和分母。
CMTimeMake(1, 2); //0.5s
CMTimeMake(4, 1); //4s
CMTimeMakeWithSeconds(60, NSEC_PER_SEC); //表示将60秒转化为CMTime时间格式
在这个demo中，可视化界面的编写主要在ZYOverlayView.h类里面，它负责用户的绝大部分交互事件。ZYOverlayView遵守ZYTransport协议，这个协议提供了与ViewController里面的AVPlayer进行通信的接口，相应代码如下：
#import <UIKit/UIKit.h> #import <AVFoundation/AVFoundation.h> @protocol ZYTransportDelegate <NSObject> - (void)play; - (void)pause; - (void)stop; /** * 跳转到某个时间点播放 * */ - (void)jumpedToTime:(NSTimeInterval)time; /** * 视频横屏 * * @param flag YES为是 */ - (void)fullScreenOrNormalSizeWithFlag:(BOOL)flag; @end @protocol ZYTransport <NSObject> /** * 是否正在缓冲 */ @property (nonatomic, assign) BOOL isBuffering; /** * 是否完成跳转 */ @property (nonatomic, assign) BOOL isFinishedJump; @property (nonatomic, assign) NSTimeInterval durationTime; @property (nonatomic, weak) id<ZYTransportDelegate>delegate; /** * 设置当前播放的时间点 */ @property (nonatomic, assign) NSTimeInterval currentPlayTime; /** * 设置当前缓冲的时间点 */ @property (nonatomic, assign) NSTimeInterval currentBufferTime; /** * 视频播放完毕 */ - (void)playbackComplete; @end
如果要视频可以显示，那么一定需要AVPlayeLayer来做视频内容的渲染面，上面提到了可视化界面的编写是在ZYPlayerView类里面实现的，所在我在这个类里面加载ZYOverlayView，以便实现相关功能的封装。
#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
#import "ZYTransport.h"
@interface ZYPlayerView : UIView
@property (nonatomic, strong) AVPlayer *player;
@property (nonatomic, weak) id<ZYTransport>transport;
@end
#import "ZYPlayerView.h"
#import "ZYOverlayView.h"
@interface ZYPlayerView
@property (nonatomic, strong) ZYOverlayView *overlayView;
@end
@implementation ZYPlayerView
+ (Class)layerClass
{
return [AVPlayerLayer class];
}
- (instancetype)init
{
if (self = [super init])
{
[self commitInit];
}
return self;
}
- (void)awakeFromNib
{
[super awakeFromNib];
[self commitInit];
}
- (void)commitInit
{
self.overlayView = [ZYOverlayView overlayView];
[self addSubview:self.overlayView];
[self.overlayView autoPinEdgesToSuperviewEdgesWithInsets:UIEdgeInsetsZero];
}
- (AVPlayer *)player
{
return [(AVPlayerLayer *)[self layer] player];
}
- (void)setPlayer:(AVPlayer *)player
{
[(AVPlayerLayer *)[self layer] setPlayer:player];
}
- (id<ZYTransport>)transport
{
return self.overlayView;
}
@end
ViewController主要是在做监听播放状态、缓冲状态，与可视化界面之间的通信，将监听到的当前播放时间、当前缓冲时间、播放结束等传递给遵守了ZYTransport协议的ZYOverlayView实例，在OverlayView实例里面进行相关操作。与可视化界面之间的通信主要表现为，暂停、播放、停止、全屏等，这些在ZYTransport协议里面都有相关的代理方法。
#import "ZYPlayerVc.h"
#import "ZYPlayerView.h"
#import <AVFoundation/AVFoundation.h>
#import "ZYTransport.h"
@interface ZYPlayerVc <ZYTransportDelegate>
@property (strong, nonatomic) ZYPlayerView *playerView;
@property (nonatomic, strong) AVPlayer *player;
@property (nonatomic, strong) AVPlayerItem *playerItem;
@property (nonatomic, weak) id<ZYTransport>transport;
@property (nonatomic, assign) CGFloat scale;
/**
* 是否获取了视频长度
*/
@property (nonatomic, assign) BOOL isFetchTotalDuration;
@property (nonatomic, strong) id timeObserver;
@property (nonatomic, assign) NSTimeInterval bufferTime;
@end
@implementation ZYPlayerVc
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
self.isFetchTotalDuration = NO;
NSURL *url = [NSURL URLWithString:@"http://v.jxvdy.com/sendfile/w5bgP3A8JgiQQo5l0hvoNGE2H16WbN09X-ONHPq3P3C1BISgf7C-qVs6_c8oaw3zKScO78I--b0BGFBRxlpw13sf2e54QA"];
self.playerItem = [[AVPlayerItem alloc] initWithURL:url];
//监听status属性
[self.playerItem addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew context:nil];
[self.playerItem addObserver:self forKeyPath:@"loadedTimeRanges" options:NSKeyValueObservingOptionNew context:nil];
self.player = [[AVPlayer alloc] initWithPlayerItem:self.playerItem];
self.playerView.player = self.player;
self.playerView.frame = CGRectMake(0, 30, kScreenW, kScreenW * kScreenW / kScreenH);
self.scale = kScreenW / self.playerView.height;
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayDidEnd:) name:AVPlayerItemDidPlayToEndTimeNotification object:nil];
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[[UIApplication sharedApplication] setStatusBarHidden:YES];
}
- (ZYPlayerView *)playerView
{
if (_playerView == nil)
{
_playerView = [[ZYPlayerView alloc] init];
_playerView.backgroundColor = [UIColor blackColor];
self.transport = _playerView.transport;
self.transport.isBuffering = YES;
self.transport.delegate = self;
[self.view addSubview:_playerView];
}
return _playerView;
}
- (void)moviePlayDidEnd:(NSNotification *)note
{
self.isFetchTotalDuration = NO;
__weak typeof(self) tmp = self;
[self.player seekToTime:kCMTimeZero completionHandler:^(BOOL finished) {
tmp.transport.currentPlayTime = 0;
tmp.transport.currentBufferTime = 0;
tmp.transport.durationTime = 0;
}];
}
//kvo
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *,id> *)change context:(void *)context
{
AVPlayerItem *item = (AVPlayerItem *)object;
if ([keyPath isEqualToString:@"status"])
{
NSLog(@"%d", (int)[item status]);
if ([item status] == AVPlayerStatusReadyToPlay)
{
[self monitorPlayingStatusWithItem:item];
}
}
else if ([keyPath isEqualToString:@"loadedTimeRanges"]) //缓冲
{
self.bufferTime = [self availableBufferTime];
if (!self.isFetchTotalDuration)
{
//获取视频总长度
NSTimeInterval totalDuration = CMTimeGetSeconds(item.duration);
self.transport.durationTime = totalDuration;
self.isFetchTotalDuration = YES;
}
if (self.transport.currentPlayTime <= self.transport.durationTime - 7)
{
//如果缓冲不够
if (self.bufferTime <= self.transport.currentPlayTime + 5)
{
self.transport.isBuffering = YES;
}
else
{
self.transport.isBuffering = NO;
}
}
else
{
self.transport.isBuffering = NO;
}
self.transport.currentBufferTime = self.bufferTime;
}
else
{
[super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
}
}
/**
* 监听播放状态
*
*/
- (void)monitorPlayingStatusWithItem:(AVPlayerItem *)item
{
__weak typeof(self) tmp = self;
self.timeObserver = [self.playerView.player addPeriodicTimeObserverForInterval:CMTimeMake(1, 1) queue:dispatch_get_main_queue usingBlock:^(CMTime time) {
NSTimeInterval currentTime = CMTimeGetSeconds(time);
tmp.transport.currentPlayTime = currentTime;
}];
}
/**
* 可用的播放时长(缓冲的时长)
*
*/
- (NSTimeInterval)availableBufferTime
{
NSArray *loadTimeRanges = [[self.player currentItem] loadedTimeRanges];
//获取缓冲区域
CMTimeRange range = [loadTimeRanges.firstObject CMTimeRangeValue];
NSTimeInterval startTime = CMTimeGetSeconds(range.start);
NSTimeInterval duration = CMTimeGetSeconds(range.duration);
return startTime + duration;
}
#pragma mark ----ZYTransportDelegate
- (void)play
{
[self.playerView.player play];
}
- (void)pause
{
[self.playerView.player pause];
}
- (void)stop
{
self.isFetchTotalDuration = NO;
[self moviePlayDidEnd:nil];
}
/**
* 跳转到某个时间点播放
*
*/
- (void)jumpedToTime:(NSTimeInterval)time
{
__weak typeof(self) tmp = self;
[self.player seekToTime:CMTimeMakeWithSeconds(time, NSEC_PER_SEC) completionHandler:^(BOOL finished) {
if (finished)
{
tmp.transport.isFinishedJump = YES;
}
}];
}
/**
* 视频横竖屏
*
* @param flag YES为是
*/
- (void)fullScreenOrNormalSizeWithFlag:(BOOL)flag
{
if (flag)
{
CGFloat moveY = self.view.center.y - self.playerView.center.y;
CGAffineTransform tmpTransform = CGAffineTransformScale(CGAffineTransformMakeTranslation(0, moveY), self.scale, self.scale);
CGAffineTransform transform = CGAffineTransformRotate(tmpTransform, - M_PI_2);
[UIView animateWithDuration:0.25 animations:^{
self.playerView.transform = transform;
}];
}
else
{
[UIView animateWithDuration:0.25 animations:^{
self.playerView.transform = CGAffineTransformIdentity;
}];
}
}
- (void)dealloc
{
[self.playerItem removeObserver:self forKeyPath:@"status"];
[self.playerItem removeObserver:self forKeyPath:@"loadedTimeRanges"];
[self.playerView.player removeTimeObserver:self.timeObserver];
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
ZYOverlayView里面最主要处理的是一个拖动滑块的事件和5秒后如果没有接到触碰事件隐藏Tool。拖动滑块的话，我是弄了一个pan手势，然后在里面计算相关位置的问题。这里有一个巨坑，一开始我并没有给滑块设置layout，只是想通过改变滑块的center来做到位置随着拖动长度的改变而改变，却发现它在上下两个Tool View隐藏的时候，回到了它的初始位置，后来给它加上layout，这个bug消失，暂时没找到bug产生原因。
基于这样一个bug，我本来是想把所有的布局改成frame布局的，但是改完之后发现，底部的Tool View根本不显示，又是一个未知原因的bug。找了很久，没明白导致这个bug产生的原因......所有我就都改成layout布局，并且未了防止总是刷新layout，在改变const的同时，将它们的frame也相应的改变了。
没有接到触碰事件隐藏Tool，是基于定时器实现的。每隔五秒，如果在五秒内有接受到任意触碰事件，就让定时器先invalidate，在resetTimer，这样确保定时器时间可以实时处于更新状态。相应代码：
#import <UIKit/UIKit.h>
#import "ZYTransport.h"
@interface ZYOverlayView : UIView <ZYTransport>
@property (nonatomic, assign) NSTimeInterval durationTime;
@property (nonatomic, weak) id<ZYTransportDelegate>delegate;
/**
* 是否正在缓冲
*/
@property (nonatomic, assign) BOOL isBuffering;
@property (nonatomic, assign) BOOL isFinishedJump;
@property (nonatomic, assign) NSTimeInterval currentPlayTime;
@property (nonatomic, assign) NSTimeInterval currentBufferTime;
+ (instancetype)overlayView;
@end
#import "ZYOverlayView.h"
@interface ZYOverlayView
/**
* 总进度
*/
@property (weak, nonatomic) IBOutlet UIView *totalProgressView;
@property (weak, nonatomic) IBOutlet UIView *bufferProgressView;
/**
* 进度上面的显示时间
*/
@property (weak, nonatomic) IBOutlet UIButton *progressTimeBtn;
/**
* 当前播放时间VIew
*/
@property (weak, nonatomic) IBOutlet UILabel *currentTimeLabel;
/**
* 总进度View
*/
@property (weak, nonatomic) IBOutlet UILabel *totalTimeLabel;
/**
* 滑块
*/
@property (weak, nonatomic) IBOutlet UIImageView *sliderView;
/**
* 当前缓冲进度的宽度
*/
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *currentProgressConW;
@property (weak, nonatomic) IBOutlet UIView *topView;
@property (weak, nonatomic) IBOutlet UIView *bottomView;
@property (weak, nonatomic) IBOutlet UIButton *playOrPauseBtn;
@property (weak, nonatomic) IBOutlet UIActivityIndicatorView *indicatorView;
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *topViewConTop;
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *bottomViewConBottom;
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *sliderConLeft;
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *progressTimeConLeft;
/**
* 是否为横屏
*/
@property (nonatomic, assign) BOOL isfullScreen;
/**
* 控制top\bottom View的隐藏定时器
*/
@property (nonatomic, strong) NSTimer *timer;
/**
* 判断是否需要控制top/bottom View隐藏
*/
@property (nonatomic, assign) BOOL isControlHidden;
/**
* top\bottom View是否正在展示
*/
@property (nonatomic, assign) BOOL isShowing;
/**
* 不是由于缓冲或者拖动滑块导致的暂停（也就是必然的暂停，交互时的暂停）
*/
@property (nonatomic, assign) BOOL isCertainPause;
/**
* 是否正在拖动滑块
*/
@property (nonatomic, assign) BOOL isDraggingSlider;
@end
@implementation ZYOverlayView
+ (instancetype)overlayView
{
return [[self alloc] init];
}
- (instancetype)init
{
if (self = [super init])
{
self = [[[NSBundle mainBundle] loadNibNamed:@"ZYOverlayView" owner:nil options:nil] lastObject];
[self commitInit];
}
return self;
}
- (void)commitInit
{
self.isfullScreen = NO;
self.isControlHidden = YES;
self.isShowing = YES;
self.indicatorView.hidden = YES;
self.isCertainPause = NO;
self.isDraggingSlider = NO;
self.progressTimeBtn.hidden = YES;
[self.indicatorView startAnimating];
self.layer.masksToBounds = YES;
self.sliderView.userInteractionEnabled = YES;
UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(draggingSlider:)];
[self.sliderView addGestureRecognizer:panRecognizer];
[self resetTimer];
}
- (void)setDurationTime:(NSTimeInterval)durationTime
{
_durationTime = durationTime;
self.totalTimeLabel.text = [self converTimeToStringWithTime:durationTime];
}
- (void)setIsBuffering:(BOOL)isBuffering
{
_isBuffering = isBuffering;
if (self.isCertainPause) return;
self.isCertainPause = NO;
//由btn的tag来判断此次事件是交互的暂停，还是缓冲导致的暂停
self.playOrPauseBtn.tag = 1;
if (isBuffering)
{
self.indicatorView.hidden = NO;
self.playOrPauseBtn.enabled = NO;
if (self.playOrPauseBtn.selected)
{
[self clickPlayOrPauseBtn:self.playOrPauseBtn];
}
}
else
{
self.indicatorView.hidden = YES;
self.playOrPauseBtn.enabled = YES;
if (!self.playOrPauseBtn.selected)
{
[self clickPlayOrPauseBtn:self.playOrPauseBtn];
}
}
self.playOrPauseBtn.tag = 0;
}
- (void)setCurrentPlayTime:(NSTimeInterval)currentPlayTime
{
_currentPlayTime = currentPlayTime;
if (!self.isDraggingSlider)
{
self.currentTimeLabel.text = [self converTimeToStringWithTime:currentPlayTime];
self.sliderView.centerX = (currentPlayTime / _durationTime) * self.totalProgressView.width;
_sliderConLeft.constant = self.totalProgressView.x + self.sliderView.centerX - self.sliderView.width / 2;
}
}
- (void)setCurrentBufferTime:(NSTimeInterval)currentBufferTime
{
_currentBufferTime = currentBufferTime;
self.bufferProgressView.width = self.totalProgressView.width * currentBufferTime / _durationTime;
self.currentProgressConW.constant = self.totalProgressView.width * currentBufferTime / _durationTime;
}
- (void)setIsFinishedJump:(BOOL)isFinishedJump
{
_isFinishedJump = isFinishedJump;
if (isFinishedJump)
{
self.isDraggingSlider = NO;
}
_isFinishedJump = NO;
}
- (IBAction)clickFinishBtn:(id)sender
{
[self.timer invalidate];
if ([self.delegate respondsToSelector:@selector(stop)])
{
[self.delegate stop];
}
[self resetTimer];
}
- (IBAction)clickFillScreenBtn:(id)sender
{
[self.timer invalidate];
self.isfullScreen = !self.isfullScreen;
if ([self.delegate respondsToSelector:@selector(fullScreenOrNormalSizeWithFlag:)])
{
[self.delegate fullScreenOrNormalSizeWithFlag:self.isfullScreen];
}
[self resetTimer];
}
- (IBAction)clickPlayOrPauseBtn:(UIButton *)sender
{
[self.timer invalidate];
[self resetTimer];
if (!sender.tag && sender.selected)
{
self.isCertainPause = YES;
}
else
{
self.isCertainPause = NO;
}
sender.selected = !sender.selected;
if (sender.selected)
{
if ([self.delegate respondsToSelector:@selector(play)])
{
[self.delegate play];
}
}
else
{
if ([self.delegate respondsToSelector:@selector(pause)])
{
[self.delegate pause];
}
}
}
/**
* 拖动滑块的时候
*
*/
- (void)draggingSlider:(UIPanGestureRecognizer *)recognizer
{
[self.timer invalidate];
CGPoint point = [recognizer translationInView:self.bottomView];
[recognizer setTranslation:CGPointZero inView:self.bottomView];
CGFloat x = point.x;
self.isDraggingSlider = YES;
if (recognizer.state == UIGestureRecognizerStateEnded)
{
[self resetTimer];
self.progressTimeBtn.hidden = YES;
CGFloat jumpedTime = self.durationTime * (self.sliderView.centerX - self.totalProgressView.x) / self.totalProgressView.width;
if ([self.delegate respondsToSelector:@selector(jumpedToTime:)])
{
[self.delegate jumpedToTime:jumpedTime];
}
}
else
{
self.progressTimeBtn.hidden = NO;
self.sliderView.centerX += x;
CGPoint point = [self.bottomView convertPoint:self.sliderView.center toView:self];
self.progressTimeBtn.centerY = point.y - 40;
self.progressTimeBtn.centerX = point.x;
if (self.sliderView.centerX > self.totalProgressView.x + self.totalProgressView.width)
{
self.sliderView.centerX = self.totalProgressView.x + self.totalProgressView.width;
}
if (self.sliderView.centerX < self.totalProgressView.x)
{
self.sliderView.centerX = self.totalProgressView.x;
}
//取消一切动画效果（一般来说，用来禁止隐式动画）
[UIView setAnimationsEnabled:NO];
CGFloat jumpedTime = self.durationTime * (self.sliderView.centerX - self.totalProgressView.x) / self.totalProgressView.width;
NSString *timeStr = [self converTimeToStringWithTime:jumpedTime];
self.progressTimeBtn.titleLabel.text = timeStr;
[self.progressTimeBtn setTitle:timeStr forState:UIControlStateNormal];
[UIView setAnimationsEnabled:YES];
self.progressTimeConLeft.constant = self.sliderView.centerX - self.progressTimeBtn.width / 2;
_sliderConLeft.constant = self.sliderView.centerX - self.sliderView.width / 2;
}
}
#pragma mark ----NSTimer相关操作
- (void)resetTimer
{
[self.timer invalidate];
self.timer = nil;
self.timer = [NSTimer scheduledTimerWithTimeInterval:5 target:self selector:@selector(updateTimer) userInfo:nil repeats:NO];
}
- (void)updateTimer
{
if (!self.timer.isValid || !self.timer || !self.isControlHidden) return;
[self hideTopAndBottomView];
}
#pragma mark ----控制top\bottom 隐藏or显示相关逻辑
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
[self showTopAndBottomView];
}
- (void)showTopAndBottomView
{
[self.timer invalidate];
if (!self.isShowing)
{
self.topView.hidden = NO;
self.bottomView.hidden = NO;
self.topViewConTop.constant = 0;
self.bottomViewConBottom.constant = 0;
[UIView animateWithDuration:0.3 animations:^{
[self layoutIfNeeded];
}completion:^(BOOL finished) {
self.isShowing = YES;
self.isControlHidden = YES;
}];
}
[self resetTimer];
}
- (void)hideTopAndBottomView
{
[self.timer invalidate];
if (self.isShowing)
{
self.topViewConTop.constant = -50;
self.bottomViewConBottom.constant = -50;
[UIView animateWithDuration:0.3 animations:^{
[self layoutIfNeeded];
} completion:^(BOOL finished) {
self.topView.hidden = YES;
self.bottomView.hidden = YES;
self.isShowing = NO;
self.isControlHidden = NO;
}];
}
}
#pragma mark ----other
- (NSString *)converTimeToStringWithTime:(NSTimeInterval)time
{
int hour = time / 60 / 60;
int minute = (time - hour * 60 * 60) / 60;
int second = (int)time % 60;
return [NSString stringWithFormat:@"%02d:%02d:%02d", hour, minute, second];
}
- (void)layoutSubviews
{
[super layoutSubviews];
}
@end
代码github地址：https://github.com/wzpziyi1/VideoPlayer
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