Sprite Kit编程指南(19)

ios原生游戏开发

hull.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:hull.size];

2. newSpaceship hull.physicsBody.dynamic = NO;

。

3. createSceneContents SKAction * makeRocks = [SKAction sequence:@ [

[SKAction performSelector:@selector(addRock) onTarget:self]

[SKAction waitForDuration:0.10 withRange:0.15]

]];

[self runAction:[SKAction repeatActionForever:makeRocks];

”

4. addRock static inline CGFloat skRandf() {

return rand()/(CGFloat)RAND_MAX;

}