在iOS開發上,如果遇到需要播放影片,如開機動畫…,我們很習慣地會使用MediaPlayer來播放影片,因為很方便使用,所以就一直使用下去。但是隨著客戶的要求越來越嚴苛,尤其是過場動畫或互動效果上的表現。所以如果在一些動畫中還挾帶影片一起運算,那勢必機器會跑不動。所以在iOS 4之後,我們可以使用AVPlayer這個類別來進行更細微的操作。
備註:
- MediaPlayer的影片是放在UIView 裡面,而AVPlayer是放在AVPlayerLayer裡面,AVPlayerLayer是CALayer 的子類別。
- 使用MediaPlayer前,要記得加入MediaPlayer.framework及#import <MediaPlayer/MediaPlayer.h>
- 使用AVPlayer前,要記得加入AVFoundation.frameworkk及#import <AVFoundation/AVFoundation.h>
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"backspace" ofType:@"mov"]; NSURL *sourceMovieURL = [NSURL fileURLWithPath:filePath]; moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:sourceMovieURL]; moviePlayer.view.frame=CGRectMake(0, 0, 1024, 768); moviePlayer.controlStyle=MPMovieControlStyleNone; // Play the movie! [self.view addSubview:moviePlayer.view];
使用AVPlayer來播放影片
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"backspace" ofType:@"mov"]; NSURL *sourceMovieURL = [NSURL fileURLWithPath:filePath]; AVAsset *movieAsset = [AVURLAsset URLAssetWithURL:sourceMovieURL options:nil]; AVPlayerItem *playerItem = [AVPlayerItem playerItemWithAsset:movieAsset]; AVPlayer *player = [AVPlayer playerWithPlayerItem:playerItem]; AVPlayerLayer *playerLayer = [AVPlayerLayer playerLayerWithPlayer:player]; playerLayer.frame = self.view.layer.bounds; playerLayer.videoGravity = AVLayerVideoGravityResizeAspect; [self.view.layer addSublayer:playerLayer]; [player play];
沒有留言:
張貼留言