CAEmitterLayer CAEmitterCell animation bug - caemittercell

Question

CAEmitterCell contents picCAEmitterLayer emits multiple CAEmitterCells with specified trajectories. When the trajectory CAEmitterCells fly to the end of time, it will become a particle graph displayed by CAEmitterCells, and then the particle graph will be scattered 360 °. However, only one trajectory particle can be animated completely, but more than two particles will appear. The trajectory particle graph will turn white
Adding a boomEmitterCell will cause the contents of CAEmitterCell in getDogLeftDownEmitterWithImageName and getRedLeftEmitterWithImageName to not display the picture and white blocks
CAEmitterLayer *emitterLayer = [[CAEmitterLayer alloc] init];
emitterLayer.emitterPosition = CGPointMake(self.view.layer.bounds.size.width -100, self.view.layer.bounds.size.height - 100);
emitterLayer.emitterSize = CGSizeMake(50, 100.f);
emitterLayer.emitterShape = kCAEmitterLayerLine;
emitterLayer.emitterMode = kCAEmitterLayerOutline;
emitterLayer.renderMode = kCAEmitterLayerOldestLast;
CAEmitterCell *dogleftEmitterCell = [self getRedLeftEmitterWithImageName:[imageArray objectAtIndex:0]];
CAEmitterCell *redLeftEmitterCell = [self getRedLeftEmitterWithImageName:[imageArray objectAtIndex:0]];
emitterLayer.emitterCells = #[dogleftEmitterCell,redLeftEmitterCell];
[self.view.layer addSublayer:emitterLayer];
//狗头左下
- (CAEmitterCell *)getDogLeftDownEmitterWithImageName:(NSString *)imageName {
CAEmitterCell *emitterCell = [[CAEmitterCell alloc] init];
emitterCell.name = #"左下狗头";
emitterCell.contents = (__bridge id _Nullable)[UIImage imageNamed:#"emoji_6"].CGImage;
//产生频率
emitterCell.birthRate = 1;
//存活时长
emitterCell.lifetime = 0.6;
//速度
emitterCell.velocity = 100;
emitterCell.xAcceleration = -1000.f; // 模拟重力影响
emitterCell.scale = 0.2;
emitterCell.scaleSpeed = 0.25;
emitterCell.emissionLongitude = M_PI_2;
// emitterCell.emissionRange = M_PI_4;
emitterCell.emitterCells = #[[self boomEmitterCell]];
return emitterCell;
}
//红包左上
- (CAEmitterCell *)getRedLeftEmitterWithImageName:(NSString *)imageName {
CAEmitterCell *emitterCell = [[CAEmitterCell alloc] init];
emitterCell.name = #"红包";
emitterCell.contents = (__bridge id _Nullable)[UIImage imageNamed:#"emoji_7"].CGImage;
//产生频率
emitterCell.birthRate = 10;
//存活时长
emitterCell.lifetime = 0.6;
// emitterCell.beginTime = self.beginTime;
//速度
emitterCell.velocity = 100;
emitterCell.yAcceleration = -1000.f; // 模拟重力影响
emitterCell.scale = 0.2;
// emitterCell.scaleRange = 0.06;
emitterCell.scaleSpeed = 0.25;
emitterCell.emissionLongitude = M_PI;
// CAEmitterCell *emitterCell = [self boomEmitterCell];
emitterCell.emitterCells = #[[self boomEmitterCell]];
return emitterCell;
}
- (CAEmitterCell *)boomEmitterCell {
// 爆炸
CAEmitterCell * explodeCell = [CAEmitterCell emitterCell];
explodeCell.name = #"explodeCell";
explodeCell.birthRate = 2.f;
explodeCell.lifetime = 0.6f;
// explodeCell.velocity = 0.f;
// explodeCell.scale = 1.0;
// explodeCell.redSpeed = -1.5; //爆炸的时候变化颜色
// explodeCell.blueRange = 1.5; //爆炸的时候变化颜色
// explodeCell.greenRange = 1.f; //爆炸的时候变化颜色
// explodeCell.birthRate = 1.0;
// explodeCell.velocity = 0;
// explodeCell.scale = 2.5;
// explodeCell.redSpeed =-1.5;
// explodeCell.blueSpeed =+1.5;
// explodeCell.greenSpeed =+1.0;
// explodeCell.lifetime = 0.35;
explodeCell.contents = (__bridge id _Nullable)[[UIImage imageNamed:#"allStart"] CGImage];
// 火花
// CAEmitterCell * sparkCell = [CAEmitterCell emitterCell];
// sparkCell.name = #"sparkCell";
//
// sparkCell.birthRate = 3.f;
// sparkCell.lifetime = 3.f;
// sparkCell.velocity = 125.f;
//// sparkCell.yAcceleration = 75.f; // 模拟重力影响
// sparkCell.emissionRange = M_PI * 2; // 360度
//
// sparkCell.scale = 1.2f;
// sparkCell.contents = (id)[[UIImage imageNamed:#"star_white_stroke"] CGImage];
// sparkCell.redSpeed = 0.4;
// sparkCell.greenSpeed = -0.1;
// sparkCell.blueSpeed = -0.1;
// sparkCell.alphaSpeed = -0.25;
// explodeCell.emitterCells = #[sparkCell];
return explodeCell;
}