//

// ViewController.m
// UI24_多媒体_视频
//
// Created by YIem on 16/3/14.
// Copyright © 2016年 YIem. All rights reserved.
//

import "ViewController.h"

// 包含视频播放库文件

import <AVFoundation/AVFoundation.h>

@interface ViewController ()
// 设置属性 - (方便操作)
// 视频信息
@property (nonatomic, retain) AVPlayer *player;
// 显示窗口
@property (nonatomic, retain) AVPlayerLayer *playerLayer;
// 视频信息
@property (nonatomic, retain) AVPlayerItem *playerItem;
// 滑动条
@property (nonatomic, retain) UISlider *progerssSlider;
// UIView
@property (nonatomic, retain) UIView *boomV;
// 判断(视频按钮(如播放进度的))影藏/显示
@property (nonatomic, assign) BOOL isTap;
@end

@implementation ViewController

• (void)viewDidLoad {

  [super viewDidLoad];
  // Do any additional setup after loading the view, typically from a nib.
  self.view.backgroundColor = [UIColor whiteColor];
  

warning - UIView

self.boomV = [[UIView alloc] initWithFrame:CGRectMake(0, 250, [UIScreen mainScreen].bounds.size.width, 50)];
// View 的背景颜色
self.boomV.backgroundColor = [UIColor blackColor];
[self.view addSubview:_boomV];

warning - 视频 - 滑动条

self.progerssSlider = [[UISlider alloc] initWithFrame:CGRectMake(5, 10, [UIScreen mainScreen].bounds.size.width - 5 * 2, 30)];
// 添加滑动条到 View上
[self.boomV addSubview:_progerssSlider];
// 添加方法
[self.progerssSlider addTarget:self action:@selector(progerssSliderAction:) forControlEvents:UIControlEventValueChanged];

warning - 手势

UITapGestureRecognizer *tapGR = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction)];
// 添加轻拍手势
[self.view addGestureRecognizer:tapGR];

pragma - 获取视频- 播放视频

[self createPlayer];

pragma - 播放

[self.player play];

pragma - 音量设置

self.player.volume = 0;

pragma - 暂停

// [self.player pause];

pragma - 调用 - 监听(状态)

[self addNotificationCenters];

pragma - 调用 - 视频时间

[self addprogerssObserver];

}

pragma - 轻拍手势 实现

• (void)tapAction
  {
  if (NO == self.isTap) {

  // 动画
  // 参数1: 持续时间
  [UIView animateWithDuration:0.5 animations:^{
      // 透明
      self.boomV.alpha = 0;
  }];

  } else {

  [UIView animateWithDuration:0.5 animations:^{
      // 半透明
      self.boomV.alpha = 0.5;
  }];

  }
  self.isTap = !self.isTap;
  }

pragma - 滑动条 实现

-(void)progerssSliderAction:(UISlider *)sender
{

// 获取视频的总时长
CGFloat duration = CMTimeGetSeconds(self.playerItem.duration);
// 当前播放的时间
CGFloat currentTime = sender.value * duration;
// 拖拽时间前进
CMTime dragedCMTime = CMTimeMake(currentTime, 1);
// 设置播放时间 - 拖拽
[self.player seekToTime:dragedCMTime completionHandler:^(BOOL finished) {
    
}];

}

warning - 视频 时间

• (void)addprogerssObserver
  {

  // CMTimeMake 是用来建立CMTike的
  // CMTime专门用来表示视频时间
  // 用法: CMTime CMTimeMake(int64_t value, int32_t timescale);
  // value - 指时间, 不是秒, 要换成秒就要看第二个参数timescale
  // timescale - 指一秒需要由多少帧率构成
  
  // 真正表示时间(秒): value / timescale
  // CMTime curFrame = CMTimeMake(第几帧, 帧率)
  __block ViewController *vc = self;
  // addPeriodicTimeObserverForInterval - AVPlayer的方法
  // 功能: 固定时间间隔执行一次
  // 设置CMTimeMake(1, 1), 代表每秒执行一次
  [vc.player addPeriodicTimeObserverForInterval:CMTimeMake(1, 1) queue:dispatch_get_main_queue() usingBlock:^(CMTime time) {
      // 注意, 总时长属于视频信息 - playerItem; 当前时间属于视频控制 - player
      // 总时长
      CGFloat duration = CMTimeGetSeconds(self.playerItem.duration);
      // 当前播放时间
      CGFloat current = CMTimeGetSeconds(self.player.currentTime);
      // 剩余时间
      CGFloat rem = duration - current;
      
      NSLog(@"%f %f", duration, current);
      
      // 剩余播放时间
      NSString *remStr = [NSString stringWithFormat:@"%02d:%02d", (int)rem % 60, (int)rem % 60];
      // 已经播放时间
      NSString *currentStr = [NSString stringWithFormat:@"%02d:%02d", (int)current / 60, (int)current % 60];
      // 已经播放时间 / 剩余播放时间
      NSString *timeStr = [NSString stringWithFormat:@"%@/%@", currentStr, remStr];
      // 打印
      NSLog(@"%@ %@ %@", currentStr, remStr, timeStr);
      
      // 设置进度值
      self.progerssSlider.value = current / duration;
  }];
  

}

warning - 监听

• (void)addNotificationCenters
  {

  // 注册观察者监听是否完成播放
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayDidEnd) name:AVPlayerItemDidPlayToEndTimeNotification object:nil];
  // 注册观察者监听屏幕旋转
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(statusBarOrientationChange) name:UIApplicationDidChangeStatusBarOrientationNotification object:nil];

  }

pragma - 实现监听是否完成播放

• (void)moviePlayDidEnd
  {

  NSLog(@"播放完成");

  }

pragma - 实现监听屏幕旋转

• (void)statusBarOrientationChange
  {

  // 视频窗口大小变化
  self.playerLayer.frame = CGRectMake(5, 5, [UIScreen mainScreen].bounds.size.width - 5 * 2, 300);
  // 详细判断
  /*

  UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
  if (UIInterfaceOrientationLandscapeRight == orientation) {
  NSLog(@"屏幕向右旋转");
  }
  if (UIInterfaceOrientationLandscapeLeft == orientation) {
  NSLog(@"屏幕向左旋转");
  }
  if (UIInterfaceOrientationPortrait == orientation) {
  NSLog(@"屏幕竖屏");
  }
  */
  }

warning - 获取数据 - 播放视频

• (void)createPlayer
  {

  // 网址
  NSString *urlStr = @"http://flv2.bn.netease.com/videolib3/1505/24/HYUCE6348/SD/HYUCE6348-mobile.mp4";
  // 转码
  urlStr = [urlStr stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
  // 实现边下边看
  NSURL *url = [NSURL URLWithString:urlStr];
  
  // 视频信息, 如url
  self.playerItem = [[AVPlayerItem alloc] initWithURL:url];
  // 播放控制器, 如声音大小, 进度等等
  self.player = [AVPlayer playerWithPlayerItem:_playerItem];
  // 显示 - 如播放器窗口大小 位置 填充/拉伸..等
  self.playerLayer = [AVPlayerLayer playerLayerWithPlayer:self.player];
  // 视频窗口大小
  self.playerLayer.frame = CGRectMake(5, 5, [UIScreen mainScreen].bounds.size.width - 5 * 2, 300);
  // 视频窗口背景颜色
  self.playerLayer.backgroundColor = [UIColor orangeColor].CGColor;
  // 视频填充模式
  // 1. AVLayerVideoGravityResize // 全部充满
  // 2. AVLayerVideoGravityResizeAspect // 原始
  // 3. AVLayerVideoGravityResizeAspectFill // 充满(出边界)
  self.playerLayer.videoGravity = AVLayerVideoGravityResizeAspect;
  // 添加显示视频播放器, 注意添加到View的layer层上
  [self.view.layer insertSublayer:self.playerLayer atIndex:0];

  }

• (void)didReceiveMemoryWarning {

  [super didReceiveMemoryWarning];
  // Dispose of any resources that can be recreated.

  }

@end