iOS粒子特效实现

粒子效果.gif

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百度百科介绍:

粒子特效-百度百科.png

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创建发射源

 emitterLayer = [CAEmitterLayer layer];

设置粒子发送器 每秒钟发送的数量

emitterLayer.birthRate = self.emitterBirthRate?self.emitterBirthRate:1.0f;

发射源位置

emitterLayer.emitterPosition = emitterPosition;

发射源尺寸

emitterLayer.emitterSize = emitterSize;

发射形状的样式

emitterLayer.emitterShape = kCAEmitterLayerLine;

发射模式

emitterLayer.emitterMode = kCAEmitterLayerPoints;

创建粒子

CAEmitterCell *emitterCell = [CAEmitterCell emitterCell];

设置粒子内容

emitterCell.contents = (__bridge id _Nullable)(self.cellContents[i].CGImage);

粒子出生量

emitterCell.birthRate = self.cellBirthRate?self.cellBirthRate:10.0f;

生命周期

emitterCell.lifetime = self.cellLifetime?self.cellLifetime:120.0f;

生命周期范围

emitterCell.lifetimeRange = self.cellLifetimeRange?self.cellLifetimeRange:10.50f;

发射的速度

emitterCell.velocity = self.cellVelocity?self.cellVelocity:0.0f;

发射速度的范围

emitterCell.velocityRange = self.cellVelocityRange?self.cellVelocityRange:10.0f;

发射的纬度

emitterCell.emissionLatitude = self.cellEmissionLatitude?self.cellEmissionLatitude:0.0f;

发射的范围

emitterCell.emissionRange = self.cellEmissionRange?self.cellEmissionRange:M_PI/4;

加速度

emitterCell.yAcceleration = self.cellYAcceleration?self.cellYAcceleration:0.0f;

把粒子的cell 放到粒子发送器上

emitterLayer.emitterCells = cellArrM;

将粒子发射器添加到layer

[view.layer addSublayer:emitterLayer];

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封装文件的使用

封装文件.png

更多使用方式详见GitHub:https://github.com/dwanghello/DWParticleEmitter