iOS-视频播放
1.首先导入MediaPlayer.framework
2.在你要写的类文件里导入#import <MediaPlayer/MediaPlayer.h>
3.声明全局变量和初始化控制器，并设置视频宽，高，Y值的宏
#define VideoY 44 //视频Y值
#define VideoWidth 320 //视频宽度
#define VideoHeight 200 //视频高度
@interface ViewController ()
{
MPMoviePlayerViewController *playerViewController;
MPMoviePlayerController *player;
UIButton *_playBtn; //播放按钮
UIImageView *_image; //播放按钮图片
UIImageView *_thumbImgView; //抓取视频的图片
}
4.设置播放按钮和播放按钮的图片
我在这里把播放按钮与视频设置的一样大，是为了更好的用户交互体验，方便用户点击播放，暂停。
//设置播放按钮 _playBtn = [UIButton buttonWithType:UIButtonTypeCustom]; _playBtn.backgroundColor = [UIColor clearColor]; [_playBtn setFrame:CGRectMake(0.0f, VideoY, VideoWidth, VideoHeight)]; [_playBtn setTitleColor:[UIColor greenColor] forState:UIControlStateNormal]; [_playBtn addTarget:self action:@selector(playVideo) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:_playBtn]; //设置播放按钮的图片 _image = [[UIImageView alloc]init]; _image.frame = CGRectMake(140,120, 50, 50); [_image setImage:[UIImage imageNamed:@"2.png"]]; [self.view addSubview:_image];
4.1 如果只有上面的方法，我们的控制界面是什么都没有，只有一张播放按钮图片，会让用户显得很不舒服，如下图所示。
为了避免这种情况，我们要获取视频的第一帧图片作为背景图片，方法如下。
//重新初始化MPMoviePlayerController，否则获取视频的第一帧图片，会引起无法播放的bug。 MPMoviePlayerController *pc = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL URLWithString:@"http://sm.domob.cn/ugc/151397.mp4"]]; //获取视频的第一帧图片 UIImage *videoThumbImg = [pc thumbnailImageAtTime:0 timeOption:MPMovieTimeOptionNearestKeyFrame]; _thumbImgView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0f, VideoY, VideoWidth, VideoHeight)]; [_thumbImgView setImage:videoThumbImg]; [self.view addSubview:_thumbImgView];
5.播放视频的方法
//播放视频
- (void) playVideo
{
//根据视频播放状态，点击视频，出现播放按钮图片或者隐藏
if (player && player.playbackState == MPMoviePlaybackStatePlaying ) {
[player pause];
_image.hidden = NO;
return;
}else if (player && player.playbackState == MPMoviePlaybackStatePaused) {
_image.hidden = YES;
[player play];
return;
}
//界面刚显示播放按钮应显示，所以调用时播放图片应为隐藏
_image.hidden = YES;
//播放视频
player = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL URLWithString:@"http://sm.domob.cn/ugc/151397.mp4"]];
player.view.frame = CGRectMake(0, VideoY, VideoWidth,VideoHeight);
player.controlStyle = MPMovieControlStyleNone;
player.repeatMode = MPMovieRepeatModeNone;
[player setFullscreen:YES animated:YES];
player.scalingMode = MPMovieScalingModeAspectFit;
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(myMovieFinishedCallback:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:player];
[self.view insertSubview:player.view belowSubview:_playBtn];
[player play];
}
6.播放视频结束方法的回调
//播放视频结束的回调
-(void)myMovieFinishedCallback:(NSNotification*)notify
{
//视频播放对象
MPMoviePlayerController* theMovie = [notify object];
//销毁播放通知
[[NSNotificationCenter defaultCenter] removeObserver:self
name:MPMoviePlayerPlaybackDidFinishNotification
object:theMovie];
[theMovie stop];
[theMovie.view removeFromSuperview];
//如果视频播放停止了,显示播放按钮图片
if (player && player.playbackState == MPMoviePlaybackStateStopped){
_image.hidden = NO;
[player stop];
return;
}
}
7.禁止视频转向，只允许竖屏
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
{
return toInterfaceOrientation == UIInterfaceOrientationPortrait;
}
- (BOOL)shouldAutorotate
{
return NO;
}
8.完成，结果如下图所示。有任何问题随时欢迎指教。
9.本文代码Demo地址下载：
http://www.oschina.net/code/snippet_1410353_35947