xcode – SCNPhysicsWorld错误

在等待解决方案时,您可以通过为自己创建临时桥来解决此问题：

添加以下类：

PhysWorldBridge.h

#import <Foundation/Foundation.h>
#import <SceneKit/SceneKit.h>//

@interface PhysWorldBridge : NSObject

- (void) physicsWorldSpeed:(SCNScene *) scene withSpeed:(float) speed;
- (void) physicsGravity:(SCNScene *) scene withGravity:(SCNVector3) gravity;

@end

PhysWorldBridge.m

#import "PhysWorldBridge.h"

@implementation PhysWorldBridge

- (id) init
{
    if (self = [super init])
    {        
    }
    return self;
}

- (void) physicsWorldSpeed:(SCNScene *) scene withSpeed:(float) speed
{
    scene.physicsWorld.speed = speed;
}

- (void) physicsGravity:(SCNScene *) scene withGravity:(SCNVector3) gravity
{
    scene.physicsWorld.gravity = gravity;
}

@end

当您添加第一个objective-c文件时,Xcode应该提示您创建一个XXX-Bridging-Header.h.让它创建这个文件.

将类的导入添加到’XXX-Bridging-header.h“：

//
//  Use this file to import your target's public headers that you would like to expose to Swift.
//

#import "PhysWorldBridge.h"

现在你可以使用这个(hacky)桥来设置Swift的属性：

//scene.physicsWorld.speed = 2.0
// CAN'T USE ABOVE OR LINKER ERROR


let bridge = PhysWorldBridge();
bridge.physicsWorldSpeed(scene,withSpeed: 2.0);
//This call bridges properly

//So would the gravity one:
bridge.physicsGravity(scene,withGravity: SCNVector3Make(0,-90.81,0));