我正在寻找在iOS应用中播放视频文件的最佳方式。我的应用程序目前正在开发中，将有大约50个视频（每个30秒长）和简短的教程。如果可能的话，我希望它们都是本地的，因此用户可以在没有互联网连接的情况下观看视频。我在堆栈溢出时找不到类似的问题（也许我正在查找错误的部分，如果我错了，请纠正我。）
所以我考虑了两种不同的选择：
如果有更好的选择，我也想知道它们！ 所以，如果有人有这方面的经验，我真的很感激一些帮助！感谢
答案 0 :(得分：3)
根据用户的观点，人们更喜欢离线模式。并希望从Appstore下载应用程序时，应用程序大小尽可能低。 所以我的建议是构建一个视频播放器，它既可以在用户上线时播放文件，也可以播放离线下载或缓存文件..
一种方法是：
使用网络服务器
简单的java服务器示例：
https://github.com/mooncatventures-group/StreamX
检查：http://www.onlinevideo.net/2011/05/streaming-vs-progressive-download-vs-adaptive-streaming/
最好构建一个让用户有权下载和存储应用内容的应用 从app store下载应用程序后。 应该可以选择删除应用下载的视频或清除缓存。
down是一个可以播放离线和在线视频的视频播放器示例。
//CustomMoviePlayerViewController.h File
#import <UIKit/UIKit.h>
#import <MediaPlayer/MediaPlayer.h>
@interface CustomMoviePlayerViewController : UIViewController
{
MPMoviePlayerController *mp;
NSURL *movieURL;
}
- (id)initWithPath:(NSString *)moviePath;
- (id)initWithURL:(NSString *)moviePath;
- (void)readyPlayer;
@end
#import "CustomMoviePlayerViewController.h"
#pragma mark -
#pragma mark Compiler Directives & Static Variables
@implementation CustomMoviePlayerViewController
/*---------------------------------------------------------------------------
*
*--------------------------------------------------------------------------*/
- (id)initWithPath:(NSString *)moviePath
{
// Initialize and create movie URL
if (self = [super init])
{
movieURL = [NSURL fileURLWithPath:moviePath];
[movieURL retain];
}
return self;
}
- (id)initWithURL:(NSString *)moviePath{
// Initialize and create movie URL
if (self = [super init])
{
movieURL = [NSURL URLWithString:moviePath];
[movieURL retain];
}
return self;
}
/*---------------------------------------------------------------------------
* For 3.2 and 4.x devices
* For 3.1.x devices see moviePreloadDidFinish:
*--------------------------------------------------------------------------*/
- (void) moviePlayerLoadStateChanged:(NSNotification*)notification
{
// Unless state is unknown, start playback
if ([mp loadState] != MPMovieLoadStateUnknown)
{
// Remove observer
[[NSNotificationCenter defaultCenter]
removeObserver:self
name:MPMoviePlayerLoadStateDidChangeNotification
object:nil];
// When tapping movie, status bar will appear, it shows up
// in portrait mode by default. Set orientation to landscape
[[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeRight animated:NO];
// Rotate the view for landscape playback
[[self view] setBounds:CGRectMake(0, 0, 480, 320)];
[[self view] setCenter:CGPointMake(160, 240)];
[[self view] setTransform:CGAffineTransformMakeRotation(M_PI / 2)];
// Set frame of movieplayer
[[mp view] setFrame:CGRectMake(0, 0, 480, 320)];
// Add movie player as subview
[[self view] addSubview:[mp view]];
// Play the movie
[mp play];
}
}
/*---------------------------------------------------------------------------
* For 3.1.x devices
* For 3.2 and 4.x see moviePlayerLoadStateChanged:
*--------------------------------------------------------------------------*/
- (void) moviePreloadDidFinish:(NSNotification*)notification
{
// Remove observer
[[NSNotificationCenter defaultCenter]
removeObserver:self
name:MPMoviePlayerContentPreloadDidFinishNotification
object:nil];
// Play the movie
[mp play];
}
/*---------------------------------------------------------------------------
*
*--------------------------------------------------------------------------*/
- (void) moviePlayBackDidFinish:(NSNotification*)notification
{
[[UIApplication sharedApplication] setStatusBarHidden:YES];
// Remove observer
[[NSNotificationCenter defaultCenter]
removeObserver:self
name:MPMoviePlayerPlaybackDidFinishNotification
object:nil];
[self dismissModalViewControllerAnimated:YES];
}
/*---------------------------------------------------------------------------
*
*--------------------------------------------------------------------------*/
- (void) readyPlayer
{
mp = [[MPMoviePlayerController alloc] initWithContentURL:movieURL];
if ([mp respondsToSelector:@selector(loadState)])
{
[mp setMovieSourceType:MPMovieSourceTypeFile];
// Set movie player layout
[mp setControlStyle:MPMovieControlStyleFullscreen];
[mp setFullscreen:YES];
// May help to reduce latency
[mp prepareToPlay];
// Register that the load state changed (movie is ready)
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(moviePlayerLoadStateChanged:)
name:MPMoviePlayerLoadStateDidChangeNotification
object:nil];
}
else
{
// Register to receive a notification when the movie is in memory and ready to play.
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(moviePreloadDidFinish:)
name:MPMoviePlayerContentPreloadDidFinishNotification
object:nil];
}
// Register to receive a notification when the movie has finished playing.
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(moviePlayBackDidFinish:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:nil];
}
/*---------------------------------------------------------------------------
*
*--------------------------------------------------------------------------*/
- (void) loadView
{
[self setView:[[[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]] autorelease]];
[[self view] setBackgroundColor:[UIColor blackColor]];
}
/*---------------------------------------------------------------------------
*
*--------------------------------------------------------------------------*/
- (void)dealloc
{
[mp release];
[movieURL release];
[super dealloc];
}
@end
//- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *filePath = [NSString stringWithFormat:@"%@",[documentsDirectory stringByAppendingPathComponent:[item valueForKey:@"URL"]]];
bool b=[[NSFileManager defaultManager] fileExistsAtPath:filePath];
CustomMoviePlayerViewController *moviePlayer;
if (b) {
moviePlayer = [[[CustomMoviePlayerViewController alloc] initWithPath:filePath] autorelease];
[self presentModalViewController:moviePlayer animated:YES];
[moviePlayer readyPlayer];
}else{
NSDictionary *item = [tableData objectAtIndex:[indexPath row]];
NSString *strURL = [NSString stringWithFormat:[item valueForKey:@"URL"]];
moviePlayer = [[[CustomMoviePlayerViewController alloc] initWithURL:strURL] autorelease];
[self presentModalViewController:moviePlayer animated:YES];
[moviePlayer readyPlayer];
}
-(void)downloadFile:(NSString *)UrlAddress
{
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:UrlAddress]];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
NSString *fileName = UrlAddress;
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:fileName];
operation.outputStream = [NSOutputStream outputStreamToFileAtPath:path append:NO];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(@"Successfully downloaded file to %@", path);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"Error: %@", error);
}];
[operation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {
NSLog(@"Download = %f", (float)totalBytesRead / totalBytesExpectedToRead);
}];
[operation start];
}
因此，这将允许您保存文件并播放+播放已存在于您的应用中的预加载文件。