I want to make a soccer ball by IOS SpriteKit - ios

Question

I want to make a soccer ball by IOS SpriteKit
I was able to create a ball in the code such as the following.
However, it does not bounce at all.
To make rebound rate, How can I do this?
(UITouch *touch in touches) {
SKSpriteNode *sprite = [SKSpriteNode spriteNodeWithImageNamed:#"Ball"];
sprite.position = location;
const CGFloat radius = 20.0f;
SKPhysicsBody *pbody = [SKPhysicsBody bodyWithCircleOfRadius:radius];
sprite.physicsBody = pbody;
sprite.size = (CGSize){radius * 2, radius * 2};
sprite.physicsBody.linearDamping=0.12f;
[self addChild:sprite];
}
I have declared like this.
　　
-(id)initWithSize:(CGSize)size {
if (self = [super initWithSize:size]) {
self.backgroundColor = [SKColor colorWithRed:0.15 green:0.15 blue:0.3 alpha:1.0];
self.physicsBody = [SKPhysicsBody bodyWithEdgeLoopFromRect:(CGRect){CGPointZero, size}];
self.physicsWorld.gravity=CGVectorMake(0, -100);
}
return self;
}

Answer 1

This looks like a ball to me
- (void) soccerBallExample
{
// the world bounds
self.physicsBody = [SKPhysicsBody bodyWithEdgeLoopFromRect:CGRectMake(0, 0, self.size.width, self.size.height)];
// the ball
SKShapeNode *ball;
ball = [[SKShapeNode alloc] init];
CGMutablePathRef myPath = CGPathCreateMutable();
CGPathAddArc(myPath, NULL, 0,0, 30, 0, M_PI*2, YES);
ball.path = myPath;
CGPathRelease(myPath);
ball.fillColor = [SKColor blueColor];
ball.position = CGPointMake(200, 200);
[self addChild:ball];
// set the physics
ball.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:30];
ball.physicsBody.restitution = 0.8;
}
In your example, you use a sprite so for radius use
// ball.size.width * 0.5;