ARKit-1

 1 #import "ViewController.h"
 2 
 3 @interface ViewController () <ARSCNViewDelegate>
 4 
 5 //ARKit框架中用于3D显示的预览视图
 6 @property (nonatomic, strong) IBOutlet ARSCNView *sceneView;
 7 
 8 @end
 9 
10     
11 @implementation ViewController
12 
13 - (void)viewDidLoad {
14     [super viewDidLoad];
15 
16     // Set the view‘s delegate
17     // 设置代理
18     self.sceneView.delegate = self;
19     
20     // Show statistics such as fps and timing information
21     // ARKit统计信息
22     self.sceneView.showsStatistics = YES;
23     
24     // Create a new scene
25     // 使用模型创建节点（scn格式文件是一个基于3D建模的文件，使用3DMax软件可以创建，这里系统有一个默认的3D飞机）
26     SCNScene *scene = [SCNScene sceneNamed:@"art.scnassets/ship.scn"];
27     
28     // Set the scene to the view
29     // 设置ARKit的场景为SceneKit的当前场景（SCNScene是Scenekit中的场景，类似于UIView）
30     self.sceneView.scene = scene;
31 }
32 
33 - (void)viewWillAppear:(BOOL)animated {
34     [super viewWillAppear:animated];
35     
36     // Create a session configuration
37     // 创建一个追踪设备配置（ARWorldTrackingSessionConfiguration主要负责传感器追踪手机的移动和旋转）
38     ARWorldTrackingSessionConfiguration *configuration = [ARWorldTrackingSessionConfiguration new];
39     
40     // Run the view‘s session
41     // 开始启动ARSession会话（启动AR）
42     [self.sceneView.session runWithConfiguration:configuration];
43 }
44 
45 - (void)viewWillDisappear:(BOOL)animated {
46     [super viewWillDisappear:animated];
47     
48     // Pause the view‘s session
49     // 暂停ARSession会话
50     [self.sceneView.session pause];
51 }
52 
53 - (void)didReceiveMemoryWarning {
54     [super didReceiveMemoryWarning];
55     // Release any cached data, images, etc that aren‘t in use.
56 }

 1 #import "ViewController.h"
 2 #import "Scene.h"
 3 
 4 @interface ViewController () <ARSKViewDelegate>
 5 
 6 @property (nonatomic, strong) IBOutlet ARSKView *sceneView;
 7 
 8 @end
 9 
10 
11 @implementation ViewController
12 
13 - (void)viewDidLoad {
14     [super viewDidLoad];
15     
16     // Set the view‘s delegate
17     // 设置场景视图代理
18     self.sceneView.delegate = self;
19     
20     // Show statistics such as fps and node count
21     // 显示帧率
22     self.sceneView.showsFPS = YES;
23     // 显示界面节点（游戏开发中，一个角色对应一个节点）
24     self.sceneView.showsNodeCount = YES;
25     
26     // Load the SKScene from ‘Scene.sks‘
27     // 加载2D场景（2D是平面的）
28     Scene *scene = (Scene *)[SKScene nodeWithFileNamed:@"Scene"];
29     
30     // Present the scene
31     // AR预览视图展现场景（这一点与3D视图加载有区别）
32     [self.sceneView presentScene:scene];
33 }
34 
35 - (void)viewWillAppear:(BOOL)animated {
36     [super viewWillAppear:animated];
37     
38     // Create a session configuration
39     // 创建设备追踪设置
40     ARWorldTrackingSessionConfiguration *configuration = [ARWorldTrackingSessionConfiguration new];
41     
42     // Run the view‘s session
43     // 开始启动AR
44     [self.sceneView.session runWithConfiguration:configuration];
45 }
46 
47 - (void)viewWillDisappear:(BOOL)animated {
48     [super viewWillDisappear:animated];
49     
50     // Pause the view‘s session
51     // 暂停ARSession会话
52     [self.sceneView.session pause];
53 }
54 
55 - (void)didReceiveMemoryWarning {
56     [super didReceiveMemoryWarning];
57     // Release any cached data, images, etc that aren‘t in use.
58 }

// 点击界面会调用该方法，类似于touch begin方法 anchor是2D坐标的瞄点 

- (SKNode *)view:(ARSKView *)view nodeForAnchor:(ARAnchor *)anchor {
    // Create and configure a node for the anchor added to the view‘s session.
    // 创建节点（节点可以理解为AR将要展示的2D图像）Text 为添加的展示内容
    SKLabelNode *labelNode = [SKLabelNode labelNodeWithText:@"??"];
    labelNode.horizontalAlignmentMode = SKLabelHorizontalAlignmentModeCenter;
    labelNode.verticalAlignmentMode = SKLabelVerticalAlignmentModeCenter;
    return labelNode;
}