iOS - SpriteKit探索

一、粒子效果：SKEmitterNode

1. 雪花效果 <转换出来的gif有点模糊嗯>

   
   
   mm.gif

2. 烟花效果<转换出来的gif有点模糊嗯>

   
   
   qqp.gif

3. 火焰效果、冒烟效果、下雨效果等等

4. 自定义效果

   
   
   图片.png

创建粒子效果步骤<以雪花举例>

1. 创建.sks文件 : File - file - SpriteKit Particle file , 选择对应粒子效果

   
   
   图片.png

2. 更改Main.storyboard 文件中view对应的父视图层级结构

   
   
   图片.png

3. 创建Scene类 ： File - file - SpriteKit Scene ,

    @property(nonatomic,strong)SKEmitterNode* emitter;
   
    - (void)didMoveToView:(SKView *)view {
   
        NSString*burstPath =[[NSBundle mainBundle] pathForResource:@"snow"ofType:@"sks"];
   
        self.emitter = [NSKeyedUnarchiver unarchiveObjectWithFile:burstPath];
   
        _emitter.position=CGPointMake(self.size.width/2,self.size.height/2-100);
   
        [self addChild:_emitter];
   
    }
   

5.如果想滑动、点击等也实现对应效果的话，实现下列代码

 - (void)touchDownAtPoint:(CGPoint)pos {
    SKEmitterNode *n = [_emitter copy];
    n.position = pos;
//    n.strokeColor = [SKColor greenColor];
    [self addChild:n];
}

//- (void)touchMovedToPoint:(CGPoint)pos {
//    SKEmitterNode *n = [_emitter copy];
//    n.position = pos;
////    n.strokeColor = [SKColor blueColor];
//    [self addChild:n];
//}

- (void)touchUpAtPoint:(CGPoint)pos {
    SKEmitterNode *n = [_emitter copy];
    n.position = pos;
//    n.strokeColor = [SKColor blueColor];
    [self addChild:n];
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    // Run 'Pulse' action from 'Actions.sks'

    for (UITouch *t in touches) {[self touchDownAtPoint:[t     locationInNode:self]];}
}

//- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
//    for (UITouch *t in touches) {[self touchMovedToPoint:[t locationInNode:self]];}
//}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    for (UITouch *t in touches) {[self touchUpAtPoint:[t locationInNode:self]];}
}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
    for (UITouch *t in touches) {[self touchUpAtPoint:[t locationInNode:self]];}
}

6. 加载效果

    GameScene *scene = (GameScene *)[SKScene nodeWithFileNamed:@"GameScene"];
    //    scene.size = CGSizeMake(KScreenWidth, KScreenHeight);
        // Set the scale mode to scale to fit the window
    scene.scaleMode = SKSceneScaleModeAspectFill;
    SKView *skView = (SKView *)self.view;
    skView.frame = CGRectMake(0, 0, KScreenWidth, KScreenHeight);
      // Present the scene
    [skView presentScene:scene];
    skView.showsFPS = YES;
    skView.showsNodeCount = YES;
   

二、拖曳效果：SKShapeNode

qwr.gif

1. 更改Main.storyboard 文件中view对应的父视图层级结构

2. 创建Scene类 ： File - file - SpriteKit Scene

     @property(nonatomic,strong) SKShapeNode * spinnyNode;
   
    - (void)didMoveToView:(SKView *)view{
   
        CGFloat w = (self.size.width + self.size.height) * 0.05;
   
        // Create shape node to use during mouse interaction
        _spinnyNode = [SKShapeNode         shapeNodeWithRectOfSize:CGSizeMake(w, w) cornerRadius:w * 0.3];
        _spinnyNode.lineWidth = 2.5;
   
        [_spinnyNode runAction:[SKAction repeatActionForever:[SKAction rotateByAngle:M_PI duration:1]]];
        [_spinnyNode runAction:[SKAction sequence:@[
            [SKAction waitForDuration:0.5],
            [SKAction fadeOutWithDuration:0.5],
            [SKAction removeFromParent],
        ]]];
    }
   

3. 拖动等代码实现

    - (void)touchDownAtPoint:(CGPoint)pos {
        SKShapeNode *n = [_spinnyNode copy];
        n.position = pos;
        n.strokeColor = [SKColor greenColor];
        [self addChild:n];
    }
   
    - (void)touchMovedToPoint:(CGPoint)pos {
        SKShapeNode *n = [_spinnyNode copy];
        n.position = pos;
        n.strokeColor = [SKColor blueColor];
        [self addChild:n];
    }
   
    - (void)touchUpAtPoint:(CGPoint)pos {
        SKShapeNode *n = [_spinnyNode copy];
        n.position = pos;
        n.strokeColor = [SKColor redColor];
        [self addChild:n];
    }
   
    - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
        // Run 'Pulse' action from 'Actions.sks'
   
        for (UITouch *t in touches) {[self touchDownAtPoint:[t locationInNode:self]];}
    }
   
    - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
        for (UITouch *t in touches) {[self touchMovedToPoint:[t locationInNode:self]];}
    }
   
    - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
        for (UITouch *t in touches) {[self touchUpAtPoint:[t locationInNode:self]];}
    }
   
    - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
        for (UITouch *t in touches) {[self touchUpAtPoint:[t locationInNode:self]];}
    }