ios 視頻播放器MPMoviePlayerController

這個東西和以前的音頻播放差很少, 也是先須要導入系統框架MediaPlayer.framework 才能使用到MPMoviePlayerController 的文件中導入相應的頭文件

初始化:這裏就有些不同了MPMoviePlayerController是能夠經過遠程url初始化的, 例如:

MPMoviePlayerController *moviePlayer = [ [ MPMoviePlayerController alloc]initWithContentURL:[NSURL urlWithString:@"URL"] ];

接下來是控制器樣式設置:

moviePlayer.moviewControlMode = MPMovieControlModeHidden;  

　　

可使用下列樣式：
MPMovieControlModeDefault            顯示播放/暫停、音量和時間控制
MPMovieControlModeVolumeOnly         只顯示音量控制
MPMovieControlModeHidden             沒有控制器

一般狀況下, 咱們通常都是本身來定義視頻播放器, 因此大多數仍是選擇最後沒有控制器的那個.

屏幕寬高比例:

moviePlayer.scallingMode = MPMovieScallingModeNone;

MPMovieScallingModeNone            不作任何縮放
MPMovieScallingModeAspectFit       適應屏幕大小，保持寬高比
MPMovieScallingModeAspectFill      適應屏幕大小，保持寬高比，可裁剪
MPMovieScallingModeFill            充滿屏幕，不保持寬高比

[ moviePlayer play ];  // 開始播放
[ moviePlayer stop ];  // 中止播放

註冊一個通知 你的程序能夠配置電影播放器在什麼時候候發送通知，包括結束加載內容、技術播放、改變寬高比等。電影播放器會將事件發送到 Cocoa 的通知中心，你能夠對其進行配置，指定將這些事件轉發到你的應用程序的一個對象。要接收這些通知，須要使用 NSNotificationCenter 類，爲電影播放器添加一個觀察者(observer):

NSNotificationCenter* notificationCenter = [NSNotificationCenter defaultCenter];  
[ notificationCenter addObserver:self selector:@selector(moviePlayerPreloadFinish:) name:MPMoviePlayerContentPreloadDidFinishNotification object:moviePlayer ];
// 通知會發到你指定的委託類和目標方法。通知參數讓你能夠知道是哪一個事件觸發了委託方法：
-(void)moviePlayerPreloadDidFinish:(NSNotification*)notification{  
    //添加你的處理代碼  
}  

　　

你會觀察到如下通知：
MPMoviePlayerContentPreloadDidFinishNotification 
當電影播放器結束對內容的預加載後發出。由於內容能夠在僅加載了一部分的狀況下播放，因此這個通知可能在已經播放後才發出。
MPMoviePlayerScallingModeDidChangedNotification 
當用戶改變了電影的縮放模式後發出。用戶能夠點觸縮放圖標，在全屏播放和窗口播放之間切換。
MPMoviePlayerPlaybackDidFinishNotification 
當電影播放完畢或者用戶按下了Done按鈕後發出。

這裏有個小實例:自定義視頻之用手勢來控制視頻進度和音量大小

 

#import <MediaPlayer/MediaPlayer.h>  
  
@interface KKBMoviePlayerController : MPMoviePlayerController<UIGestureRecognizerDelegate>  
  
@end  

　　

#import "KKBMoviePlayerController.h"  
#import "AppDelegate.h"  
@interface KKBMoviePlayerController(){  
    BOOL _inFullScreen;  
    UIPanGestureRecognizer *_pan;  
      
    CGPoint _lastPoint;  
    BOOL _startChange;  
    BOOL _changeVolume;  
}  
  
@end  
  
@implementation KKBMoviePlayerController  
  
- (id)initWithContentURL:(NSURL *)url{  
    self =[super initWithContentURL:url];  
    if (self) {  
          
        self.view.backgroundColor = [UIColor clearColor];  
        self.initialPlaybackTime = -1;  
        self.endPlaybackTime = -1;  
        [self prepareToPlay];  
        [self play];  
          
        [[NSNotificationCenter defaultCenter] addObserver:self  
                                                 selector:@selector(enterFullScreen:)  
                                                     name:MPMoviePlayerWillEnterFullscreenNotification  
                                                   object:nil];  
          
        [[NSNotificationCenter defaultCenter] addObserver:self  
                                                 selector:@selector(leaveFullScreen:)  
                                                     name:MPMoviePlayerWillExitFullscreenNotification  
                                                   object:nil];  
    }  
    return self;  
}  
  
#pragma mark - full screen controller  
  
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{  
    return YES;  
}  
  
- (void)handlePan:(UIPanGestureRecognizer*)rec{  
    if (_inFullScreen) {  
        if (rec.state == UIGestureRecognizerStateBegan) {  
            _lastPoint = [rec locationInView:self.view];  
        } else if (rec.state == UIGestureRecognizerStateChanged) {  
            CGPoint nowPoint = [rec locationInView:self.view];  
              
            if (_startChange == NO) {  
                if (fabs(nowPoint.y - _lastPoint.y) > fabs(nowPoint.x - _lastPoint.x)) {  
                    _changeVolume = NO;  
                } else {  
                    _changeVolume = YES;  
                }  
                _startChange = YES;  
            } else {  
                if (_changeVolume) {  
                    //change volume  
                    float volume = [[MPMusicPlayerController applicationMusicPlayer] volume];  
                    float newVolume = volume;  
                      
                    if (nowPoint.x == _lastPoint.x) {  
                          
                    } else {  
                        if (nowPoint.x < _lastPoint.x) {  
                            newVolume += 0.01;  
                        } else {  
                            newVolume -= 0.01;  
                        }  
                    }  
                      
                    if (newVolume < 0) {  
                        newVolume = 0;  
                    } else if (newVolume > 1.0) {  
                        newVolume = 1.0;  
                    }  
                      
                    [[MPMusicPlayerController applicationMusicPlayer] setVolume:newVolume];  
                } else {  
                    //change playback state  
                    if (self.playbackState != MPMoviePlaybackStateSeekingForward &&  
                        self.playbackState != MPMoviePlaybackStateSeekingBackward) {  
                        if (nowPoint.y == _lastPoint.y) {  
                              
                        } else {  
                            if (nowPoint.y < _lastPoint.y) {  
                                [self beginSeekingForward];  
                            } else {  
                                [self beginSeekingBackward];  
                            }  
                        }  
                        _lastPoint = nowPoint;  
                    }  
                }  
                  
            }  
              
        } else if (rec.state == UIGestureRecognizerStateCancelled ||  
                   rec.state == UIGestureRecognizerStateEnded ||  
                   rec.state == UIGestureRecognizerStateFailed){  
            _startChange = NO;  
            [self endSeeking];  
        }  
    }  
}  
  
- (void)enterFullScreen:(NSNotification*)notification{  
    _inFullScreen = YES;  
      
    _pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)];  
    _pan.delegate = self;  
      
    [[[[UIApplication sharedApplication] windows] objectAtIndex:0] addGestureRecognizer:_pan];  
}  
  
- (void)leaveFullScreen:(NSNotification*)notification{  
    _inFullScreen = NO;  
    [[[[UIApplication sharedApplication] windows] objectAtIndex:0] removeGestureRecognizer:_pan];  
}  
  
@end  

　　

原文: http://blog.csdn.net/u013561113/article/details/21457903