如何设置SKNodes或SKSpriteNode的动画以使其发生碰撞和反弹？
我有几个关于SKNodes和/或SKSpriteNodes动画的问题。第一个问题是如何在视图加载后让它们移动？我如何让它们相互碰撞和反弹，然后走向另一个方向。为此，我使用了一个SKScene。另外，有没有一种方法可以用SKLabels对SKSriteNodes进行分组？
我有：
#import <SpriteKit/SpriteKit.h>
//constants for the collision bitmap
static const uint32_t classicCategory = 1 << 0;
static const uint32_t arcadeCategory = 1 << 1;
static const uint32_t frenzieCategory = 1 << 2;
@interface HomeScene : SKScene <SKPhysicsContactDelegate> {
BOOL isSoundActionCompleted;
}
@end下面是我声明SKSpriteNodes的地方
SKSpriteNode *classicMode = [SKSpriteNode spriteNodeWithImageNamed:@"bubble.png"];
classicMode.size = CGSizeMake(130, 130);
classicMode.position = CGPointMake(self.size.width/2, self.size.height/2+50);
classicMode.name = @"classicMode";
[self addChild:classicMode];
SKLabelNode *classicTitle = [SKLabelNode labelNodeWithFontNamed:@"Noteworthy"];
classicTitle.text = @"Classic";
classicTitle.fontSize = 25;
classicTitle.horizontalAlignmentMode = SKLabelHorizontalAlignmentModeCenter;
classicTitle.verticalAlignmentMode = SKLabelVerticalAlignmentModeCenter;
classicTitle.fontColor = [SKColor darkGrayColor];
classicTitle.position = CGPointMake(self.size.width/2, self.size.height/2+50);
classicTitle.name = @"classicTitle";
[self addChild:classicTitle];另一个在这里
SKSpriteNode *arcadeMode = [SKSpriteNode spriteNodeWithImageNamed:@"bubble.png"];
arcadeMode.size = CGSizeMake(130, 130);
arcadeMode.position = CGPointMake(self.size.width/2+68, self.size.height/2-65);
arcadeMode.name = @"arcadeMode";
[self addChild:arcadeMode];
SKLabelNode *arcadeTitle = [SKLabelNode labelNodeWithFontNamed:@"Noteworthy"];
arcadeTitle.text = @"Arcade";
arcadeTitle.fontSize = 25;
arcadeTitle.horizontalAlignmentMode = SKLabelHorizontalAlignmentModeCenter;
arcadeTitle.verticalAlignmentMode = SKLabelVerticalAlignmentModeCenter;
arcadeTitle.fontColor = [SKColor darkGrayColor];
arcadeTitle.position = CGPointMake(self.size.width/2+68, self.size.height/2-65);
arcadeTitle.name = @"arcadeTitle";
[self addChild:arcadeTitle];冲突：
//collision and contact detection
self.physicsBody.categoryBitMask = arcadeCategory;
//physics and collision detection
classicMode.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:classicMode.size];
classicMode.physicsBody.dynamic = NO; //no gravity
classicMode.physicsBody.categoryBitMask = arcadeCategory;
arcadeMode.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:arcadeMode.size];
arcadeMode.physicsBody.dynamic = NO; //no gravity
arcadeMode.physicsBody.categoryBitMask = classicCategory;和碰撞检测：
//collision detection
classicMode.physicsBody.categoryBitMask = classicCategory;
classicMode.physicsBody.collisionBitMask = arcadeCategory;
classicMode.physicsBody.contactTestBitMask = arcadeCategory;
arcadeMode.physicsBody.categoryBitMask = arcadeCategory;
arcadeMode.physicsBody.collisionBitMask = classicCategory;
arcadeMode.physicsBody.contactTestBitMask = classicCategory;回答 1
Stack Overflow用户
发布于 2014-09-27 18:02:13
1)代码中的第一个问题是，两个静态实体永远不会发生冲突，从而使它们成为动态的。因此，至少使一个或两个身体为动力学。
2)其次，对于线性运动，对动态身体使用body.physicsBody.velocity属性。
3)修改位掩码类别classicMode.physicsBody.categoryBitMask = classicCategory；classicMode.physicsBody.collisionBitMask = arcadeCategory；classicMode.physicsBody.contactTestBitMask = arcadeCategory；
arcadeMode.physicsBody.categoryBitMask = arcadeCategory;请记住，当两个物体相互接触或碰撞时，contactTestBitMask在spritekit中使用，而collisionBitMask用于使它们相互重叠或穿过
我从您的代码中删除了arcadeMode.physicsBody.collisionBitMask = classicCategory；arcadeMode.physicsBody.contactTestBitMask = classicCategory；，因为您已经在classicMode.physicsBody.categoryBitMask = classicCategory；classicMode.physicsBody.collisionBitMask = arcadeCategory；classicMode.physicsBody.contactTestBitMask = arcadeCategory；中定义了它，所以不需要修改它
当您想要两个类别相互交互时，只能使用contactTestBitMask和collisionBitMask一次
4)在didbegincontact和didEndContact中处理所有的冲突和冲突逻辑
https://stackoverflow.com/questions/26028844
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