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+ How to animate a rocket.
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+Learn how to animate a rocket
in Objective-C using SpriteKit
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+ Begin by setting up your scene.
+<
+
+ -(id)initWithSize:(CGSize)size {
+ if (self = [super initWithSize:size]) {
+ /* Setup your scene here */
+
+
+
+ self.backgroundColor = [SKColor colorWithRed:0.05 green:0.05 blue:0.3 alpha:1.0];
+ self.view.backgroundColor = [UIColor clearColor];
+ self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"Spaceship.png"]];
+
+ SKLabelNode *myLabel = [SKLabelNode labelNodeWithFontNamed:@"HelveticaNeue"];
+
+ myLabel.text = @"How To Build A Rocket";
+ myLabel.fontSize = 15;
+ myLabel.position = CGPointMake(CGRectGetMidX(self.frame),
+ CGRectGetMidY(self.frame));
+
+ [self addChild:myLabel];
+ }
+ return self;
+ }
+
+
Now call the nosecone when touch begins.
+
+ -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
+ /* Called when a touch begins */
+
+ for (UITouch *touch in touches) {
+ CGPoint location = [touch locationInNode:self];
+
+ SKSpriteNode *sprite = [SKSpriteNode spriteNodeWithImageNamed:@"nosecone"];
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+ sprite.position = location;
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+ SKAction *action = [SKAction rotateByAngle:M_PI duration:1];
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+ [sprite runAction:[SKAction repeatActionForever:action]];
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+ [self addChild:sprite];
+ }
+ }
+ Call the ship when dragging the touch across your screen.
+
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+ -(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
+ /* Called when a touch moves */
+
+ for (UITouch *touch in touches) {
+ CGPoint location = [touch locationInNode:self];
+
+ SKSpriteNode *sprite = [SKSpriteNode spriteNodeWithImageNamed:@"spacecraft"];
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+ sprite.position = location;
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+ SKAction *action = [SKAction rotateByAngle:M_PI duration:1];
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+ [sprite runAction:[SKAction repeatActionForever:action]];
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+ [self addChild:sprite];
+ }
+ }
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+
Finally, call the trunk on touch release.
+
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+ -(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
+ /* Called when a touch ends */
+
+ for (UITouch *touch in touches) {
+ CGPoint location = [touch locationInNode:self];
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+ SKSpriteNode *sprite = [SKSpriteNode spriteNodeWithImageNamed:@"trunk"];
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+ sprite.position = location;
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+ SKAction *action = [SKAction rotateByAngle:M_PI duration:1];
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+ [sprite runAction:[SKAction repeatActionForever:action]];
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+ [self addChild:sprite];
+ }
+ }
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+
Now hit Run, and enjoy:
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+The full Obj C repo is available here.
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+