播放 视频

//
//  VideoViewController.m
//  VideoTest
//
//  Created by lkk on 13-11-25.
//  Copyright (c) 2013年 lkk. All rights reserved.
//
 
#import "VideoViewController.h"
#import "ASIHTTPRequest.h"
#import "AudioButton.h"
#import <MediaPlayer/MediaPlayer.h>
 
@interface VideoViewController ()
 
@end
 
@implementation VideoViewController
 
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
        //注册  视频播放结束通知
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(videoFinished) name:MPMoviePlayerPlaybackDidFinishNotification object:nil];
    }
    return self;
}
 
- (void)viewDidLoad
{
    // 5 横竖屏控制
    AppDelegate * appDelegate = [[UIApplication sharedApplication] delegate];
    appDelegate.isFull = YES;
    
    
    [super viewDidLoad];
    
    self.view.backgroundColor = kGrayColor2;
    
// 修改1  创建播放按钮
    AudioButton *musicBt = [[AudioButton alloc]initWithFrame:CGRectMake(135, 210, 50, 50)];
    
    [musicBt addTarget:self action:@selector(videoPlay) forControlEvents:UIControlEventTouchUpInside];
    
    [musicBt setTag:1];
    
    [self.view addSubview:musicBt];
    
    //播放
    [self videoPlay];
 
    
}
 
- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}
 
//播放
- (void)videoPlay{
    
    NSString *webPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Library/Private Documents/Temp"];
    NSLog(@" web path :%@", webPath);
    
    NSString *cachePath = [NSHomeDirectory() stringByAppendingPathComponent:@"Library/Private Documents/Cache"];
    
    NSFileManager *fileManager=[NSFileManager defaultManager];
    
    NSLog(@"cachepath :%@", cachePath);
    
    if(![fileManager fileExistsAtPath:cachePath])
    {
        [fileManager createDirectoryAtPath:cachePath withIntermediateDirectories:YES attributes:nil error:nil];
    }
    //添加 ID为名字 并加 .mp4 后缀
    if ([fileManager fileExistsAtPath:[cachePath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.mp4", _mp4_id]]]) {
        
// 修改2
        //从缓存路径 读取 播放
        MPMoviePlayerViewController *playerViewController = [[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL fileURLWithPath:[cachePath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.mp4", _mp4_id]]]];
        [self presentMoviePlayerViewControllerAnimated:playerViewController];
        
        videoRequest = nil;
         NSLog(@"播放 本地");
    }else{
        
        ASIHTTPRequest *request=[[ASIHTTPRequest alloc] initWithURL:[NSURL URLWithString:_mp4_url]];
 
        AudioButton *musicBt = (AudioButton *)[self.view viewWithTag:1];
        [musicBt startSpin];
        //下载完存储目录
        [request setDownloadDestinationPath:[cachePath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.mp4", _mp4_id]]];
        //临时存储目录
        [request setTemporaryFileDownloadPath:[webPath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.mp4", _mp4_id]]];
        [request setBytesReceivedBlock:^(unsigned long long size, unsigned long long total) {
            [musicBt stopSpin];
            NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
            [userDefaults setDouble:total forKey:@"file_length"];
            Recordull += size;//Recordull全局变量，记录已下载的文件的大小
            if (!isPlay&&Recordull > 400000) {
                isPlay = !isPlay;
                [self playVideo];
            }
        }];
        
        //断点续载
        [request setAllowResumeForFileDownloads:YES];
        [request startAsynchronous];
        videoRequest = request;
               NSLog(@"播放 网络");
    }
}
 
 
- (void)playVideo{
    MPMoviePlayerViewController *playerViewController =[[MPMoviePlayerViewController alloc]initWithContentURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://127.0.0.1:12345/%@.mp4", _mp4_id]]];
    [self presentMoviePlayerViewControllerAnimated:playerViewController];
 
}
 
 
#pragma mark - 接收到播放结束通知执行
- (void)videoFinished{
    if (videoRequest) {
        isPlay = !isPlay;
        [videoRequest clearDelegatesAndCancel];
        videoRequest = nil;
    }
//  修改三
     [self.navigationController popViewControllerAnimated:YES];
    // 4. 横竖屏控制
    AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
    appDelegate.isFull =NO;
    if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)]) {
        
        SEL selector = NSSelectorFromString(@"setOrientation:");
        
        NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];
        [invocation setSelector:selector];
        [invocation setTarget:[UIDevice currentDevice]];
        int val =UIInterfaceOrientationPortrait;
        [invocation setArgument:&val atIndex:2];
        [invocation invoke];
    }
 
 
}
@end