ARKit 在模型上播放视频（附进度控制）

把模型的material 设置成AVPlayer  就可以了



SCNMaterial \* material = [[SCNMaterial alloc]init];



material.diffuse.contents = self.player;



self.showNode.geometry.materials = @[material];

//

//  ViewController.m

//  palyVoidOnSCNNode

//

//  Created by LJP on 2018/5/3.

//  Copyright © 2018年 ljp. All rights reserved.

//



#import "ViewController.h"



@interface ViewController () <ARSCNViewDelegate>



@property (nonatomic, strong) IBOutlet ARSCNView \*sceneView;



/\*\*

 \*  添加模型按钮

 \*/

@property (nonatomic, strong) UIButton \* addNodeBtn;



/\*\*

 \*  把视频加在模型上的按钮

 \*/

@property (nonatomic, strong) UIButton \* playVoidBtn;



/\*\*

 \*  播放器对象

 \*/

@property (nonatomic, strong) AVPlayer \*player;



/\*\*

 \*  展示的模型

 \*/

@property (nonatomic, strong) SCNNode \*showNode;



/\*\*

 \*  调节进度的滑竿

 \*/

@property (nonatomic, strong) UISlider \*slider;



/\*\*

 \*  调节的时间

 \*/

@property (nonatomic, assign) CMTime chaseTime;



@end



    

@implementation ViewControlle



#pragma mark ========================= 生命周期 =========================

- (void)viewDidLoad {

    [super viewDidLoad];

    

    [self initUI];

}



- (void)viewWillAppear:(BOOL)animated {

    [super viewWillAppear:animated];

    

    ARWorldTrackingConfiguration \*configuration = [ARWorldTrackingConfiguration new];



    [self.sceneView.session runWithConfiguration:configuration];

}



- (void)viewWillDisappear:(BOOL)animated {

    [super viewWillDisappear:animated];

    

    [self.sceneView.session pause];

}





#pragma mark ========================= 初始化方法 ========================

- (void)initUI {

    

    self.sceneView.delegate = self;

    SCNScene \*scene = [SCNScene new];

    self.sceneView.scene = scene;

    

    [self.sceneView addSubview:self.addNodeBtn];

    [self.sceneView addSubview:self.playVoidBtn];

    [self.sceneView addSubview:self.slider];



}





#pragma mark ========================= 私有方法 ==========================

- (void)trySeekToChaseTime{

    

    if (\_player.currentItem.status == AVPlayerItemStatusReadyToPlay) {

        

        [self actuallySeekToTime];

        

    }

    

}



- (void)actuallySeekToTime {

    

    CMTime seekTimeInProgress = self.chaseTime;



    [self.player seekToTime:seekTimeInProgress

            toleranceBefore:kCMTimeZero

            toleranceAfter :kCMTimeZero

          completionHandler:^(BOOL finished) {

        

//        [self.player play]; 打开就会自动播放了



    }];

    

}



#pragma mark ========================= 事件处理 ==========================

- (void)clickAddNodeBtn {

    

    [self.sceneView.scene.rootNode addChildNode:self.showNode];

    

}



- (void)clickPlayVoidBtn {

   

    SCNMaterial \* material = [[SCNMaterial alloc]init];

    

    material.diffuse.contents = self.player;

    

    self.showNode.geometry.materials = @[material];

    

    [self.player play];

    

}



- (void)playerProcess:(UISlider \*)slider{



    NSString \* urlStr = [[NSBundle mainBundle]pathForResource:@"movie.MP4" ofType:nil];

    

    NSURL \* url = [NSURL fileURLWithPath:urlStr];

    

    AVAsset \* asset = [AVAsset assetWithURL:url];

    

    float totalTime = CMTimeGetSeconds(asset.duration);

    

    [self.player pause];

    

    CMTime newChaseTime = CMTimeMake(totalTime \* slider.value \* asset.duration.timescale, asset.duration.timescale);

    

    self.chaseTime = newChaseTime;

    

    [self actuallySeekToTime];



}





#pragma mark ========================= 代理方法 ==========================





#pragma mark ========================= 访问器方法 =========================

- (UIButton \*)addNodeBtn {

    if (\_addNodeBtn == nil) {

        \_addNodeBtn = [UIButton buttonWithType:UIButtonTypeSystem];

        \_addNodeBtn.frame = CGRectMake(self.view.frame.size.width/4-40, self.view.frame.size.height-160, 80, 48);

        [\_addNodeBtn setTitle:@"添加模型" forState:0];

        [\_addNodeBtn addTarget:self action:@selector(clickAddNodeBtn) forControlEvents:UIControlEventTouchUpInside];

    }

    return \_addNodeBtn;

}



- (UIButton \*)playVoidBtn {

    if (\_playVoidBtn == nil) {

        \_playVoidBtn = [UIButton buttonWithType:UIButtonTypeSystem];

        \_playVoidBtn.frame = CGRectMake(self.view.frame.size.width/4\*3-40, self.view.frame.size.height-160, 80, 48);

        [\_playVoidBtn setTitle:@"播放视频" forState:0];

        [\_playVoidBtn addTarget:self action:@selector(clickPlayVoidBtn) forControlEvents:UIControlEventTouchUpInside];

    }

    return \_playVoidBtn;

}



- (UISlider \*)slider{

    if (!\_slider) {

        \_slider = [[UISlider alloc] initWithFrame:CGRectMake(30, 600, 300, 30)];

        \_slider.maximumValue = 1;

        \_slider.minimumValue = 0;

        \_slider.thumbTintColor = [UIColor blueColor];

        \_slider.tintColor = [UIColor redColor];

        \_slider.continuous = YES;

        [\_slider addTarget:self action:@selector(playerProcess:) forControlEvents:UIControlEventValueChanged];

    }

    return \_slider;

}



-(AVPlayer \*)player{

    if (!\_player) {

        AVPlayerItem \*playerItem=[self getPlayItem:0];

        \_player=[AVPlayer playerWithPlayerItem:playerItem];

    }

    return \_player;

}



-(AVPlayerItem \*)getPlayItem:(int)videoIndex{

    NSString \* urlStr = [[NSBundle mainBundle]pathForResource:@"movie.MP4" ofType:nil];

    

    NSURL \*url=[NSURL fileURLWithPath:urlStr];

    

    AVPlayerItem \*playerItem=[AVPlayerItem playerItemWithURL:url];

    return playerItem;

}



- (SCNNode \*)showNode {

    if (\_showNode == nil) {

        \_showNode = [SCNNode new];

        SCNBox \* box = [SCNBox boxWithWidth:0.3 height:0.3 length:0.3 chamferRadius:0];

        \_showNode.geometry = box;

        \_showNode.position = SCNVector3Make(0, 0.5, -1);

    }

    return \_showNode;

}



@end