音频和视频(Audio & Video)

音频和视频在最新的设备中颇为常见。

将iosAVFoundation.framework和MediaPlayer.framework添加到Xcode项目中，可以让IOS支持音频和视频(Audio & Video)。

实例步骤

创建一个简单的View based application

选择项目文件、选择目标，然后添加AVFoundation.framework和MediaPlayer.framework

在ViewController.xib中添加两个按钮，创建一个用于分别播放音频和视频的动作（action）

更新ViewController.h,如下所示

#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
#import <MediaPlayer/MediaPlayer.h>

@interface ViewController : UIViewController
{
    AVAudioPlayer \*audioPlayer;
    MPMoviePlayerViewController \*moviePlayer;

}
-(IBAction)playAudio:(id)sender;
-(IBAction)playVideo:(id)sender;
@end

更新ViewController.m，如下所示

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    \[super viewDidLoad\];
}

- (void)didReceiveMemoryWarning
{
   \[super didReceiveMemoryWarning\];
   // Dispose of any resources that can be recreated.
}
-(IBAction)playAudio:(id)sender{
   NSString \*path = \[\[NSBundle mainBundle\]
   pathForResource:@"audioTest" ofType:@"mp3"\];
   audioPlayer = \[\[AVAudioPlayer alloc\]initWithContentsOfURL:
   \[NSURL fileURLWithPath:path\] error:NULL\];
   \[audioPlayer play\];
}
-(IBAction)playVideo:(id)sender{
   NSString \*path = \[\[NSBundle mainBundle\]pathForResource:
   @"videoTest" ofType:@"mov"\];
   moviePlayer = \[\[MPMoviePlayerViewController 
   alloc\]initWithContentURL:\[NSURL fileURLWithPath:path\]\];
   \[self presentModalViewController:moviePlayer animated:NO\];
}
@end

注意项

需要添加音频和视频文件，以确保获得预期的输出

输出

运行该程序，得到的输出结果如下

当我们点击 play video(播放视频)显示如下：