How to move&jump animation sprite in box2d - xcode4

Question

in this code created a animation sprite using spritesheet. the sprite created body. there boy can move on world using button.
//spritesheet plist
[[CCSpriteFrameCache sharedSpriteFrameCache]
addSpriteFramesWithFile:#"boyRunning.plist"];
// Create a sprite sheet with the boyRunning images
spriteSheet = [CCSpriteBatchNode batchNodeWithFile:#"boyRunning.png"];
[self addChild:spriteSheet];
// Load up the frames of our animation
NSMutableArray *walkAnimFrames = [NSMutableArray array];
for(int i = 2; i <=7; ++i) {
[walkAnimFrames addObject:[[CCSpriteFrameCache sharedSpriteFrameCache] spriteFrameByName:[NSString stringWithFormat:#"boyRunning%d.png", i]]];
}
walkAnim = [CCAnimation animationWithFrames:walkAnimFrames delay:0.1f];
// Create a sprite for our boy
CGSize winSize = [CCDirector sharedDirector].winSize;
self.boy = [CCSprite spriteWithSpriteFrameName:#"boyRunning1.png"];
_boy.position = ccp(100, 90);
self.walkAction = [CCRepeatForever actionWithAction:[CCAnimate actionWithAnimation:walkAnim restoreOriginalFrame:NO]];
[_boy runAction:_walkAction];
[spriteSheet addChild:_boy];
// boy body creation
b2BodyDef boyBodyDef;
boyBodyDef.type = b2_dynamicBody;
boyBodyDef.linearDamping = 1;
boyBodyDef.angularDamping = 1;
boyBodyDef.position.Set(230.0f/PTM_RATIO,(FLOOR_HEIGHT+91.0f)/PTM_RATIO);
boyBodyDef.userData = _boy;
boyBody = world->CreateBody(&boyBodyDef);
b2Body* dynamicBody = world->CreateBody(&boyBodyDef);
// Define another box shape for our dynamic body.
b2PolygonShape boxshape;
boxshape.SetAsBox(11.0f/PTM_RATIO, 30.0f/PTM_RATIO);//These are mid points for our 1m box
// Define the dynamic body fixture.
b2FixtureDef fixtureDef;
fixtureDef.shape = &boxshape;
fixtureDef.density = 1.0f;
fixtureDef.friction = 0.3f;
armFixture = boyBody->CreateFixture(&fixtureDef);
dynamicBody->SetTransform( b2Vec2( 10, 20 ), 1 );

Answer 1

When the button is pressed
For movement use
body->ApplyForce( b2Vec2(0,50), bodiy]->GetWorldCenter() );
For jump
body[0]->ApplyLinearImpulse( b2Vec2(50,50), body->GetWorldCenter() );
Where body is your body attached to sprite and b2ve2(x,y) is the direction .