https://github.com/imwcl/WclEmitterButton

.h

//兩種不同的CAEmitterLayer
@property (strong, nonatomic) CAEmitterLayer *explosionLayer;

/**
 *  開始噴射
 */
- (void)startAnimate;

/**
 *  停止噴射
 */
- (void)stop;

- (void)destroy;

.m

/*
 CAKeyframeAnimation       // 核心動畫-關(guān)鍵幀動畫
 CAEmitterLayer            // 粒子發(fā)射器(其實就是一個Layer,其父類是CALayer)
 CAEmitterCell             // 粒子
 PS:核心動畫應該不用多說了;
 CAEmitterLayer和CAEmitterCell惨篱，其實可以比喻成“炮”和“炮彈”,應該不難理解;
 */

- (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        [self setup];
    }
    return self;
}

/**
 *  配置WclEmitterButton
 */
- (void)setup {
    //參數(shù)詳情請見博客詳解：http://blog.csdn.net/wang631106979/article/details/51258020
    CAEmitterCell *explosionCell = [CAEmitterCell emitterCell];
    explosionCell.name           = @"explosion";
    explosionCell.alphaRange     = 0.50;// 一個粒子的顏色alpha能改變的范圍
    explosionCell.alphaSpeed     = -0.7;// 粒子透明度在生命周期內(nèi)的改變速度
    explosionCell.lifetime       = 5;// 生命周期
    explosionCell.lifetimeRange  = 1;// 生命周期范圍 lifetime= lifetime(+/-) lifetimeRange
    explosionCell.birthRate      = 0;// 每秒發(fā)射的粒子數(shù)量
    explosionCell.velocity       = 10.00;// 速度
    explosionCell.velocityRange  = 1500.00;// 速度范圍
    explosionCell.scale          = 0.8;// 縮放比例
    explosionCell.scaleRange     = 0.4;// 縮放比例范圍
    explosionCell.contents       = (id)[UIImage imageNamed:@"scene_finish_fly_star.png"].CGImage;// 是個CGImageRef的對象,既粒子要展現(xiàn)的圖片
    
    _explosionLayer               = [CAEmitterLayer layer];
    _explosionLayer.name          = @"emitterLayer";
    _explosionLayer.emitterShape  = kCAEmitterLayerCircle;// 發(fā)射源的形狀
    _explosionLayer.emitterMode   = kCAEmitterLayerOutline;// 渲染模式
    _explosionLayer.emitterSize   = CGSizeMake(30, 0);// 發(fā)射源的大小
    _explosionLayer.emitterCells  = @[explosionCell];// 粒子發(fā)射的粒子的數(shù)組
    _explosionLayer.renderMode    = kCAEmitterLayerOldestFirst;// 渲染模式
    _explosionLayer.masksToBounds = NO;// 是否圓角
    _explosionLayer.position      = CGPointMake(self.frame.size.width/2.0, self.frame.size.height/2.0);// 位置
    _explosionLayer.zPosition     = -1; // z軸位置
    [self.layer addSublayer:_explosionLayer];
}

/**
 *  開始噴射
 */
- (void)startAnimate {
    //explosionLayer開始時間
    self.explosionLayer.beginTime = CACurrentMediaTime();
    //explosionLayer每秒噴射的個數(shù)
    [self.explosionLayer setValue:@40 forKeyPath:@"emitterCells.explosion.birthRate"];
}

/**
 *  停止噴射
 */
- (void)stop {
    //explosionLayer每秒噴射的0個
    [self.explosionLayer setValue:@0 forKeyPath:@"emitterCells.explosion.birthRate"];
}

- (void)destroy {
    [self stop];
}