无法让CAEmitterLayer显示粒子

Question

我读过一些教程，并查看了文档，但我无法让我的CAEmitterLayer显示任何粒子。我有一个CAEmitterLayer和CAEmitterCell属性，这两个属性都具有非原子属性和存储属性。也许我错过了一个步骤，但是我已经导入了QuartzCore，下面是我在viewDidLoad中调用的设置层和单元格的方法：

-(void) setupEmitter{

 self.emitterLayer = [CAEmitterLayer layer];
 self.emitterLayer.bounds = CGRectMake(0, 0, 200,200);
 self.emitterLayer.position = CGPointMake(100,100);
 self.emitterLayer.backgroundColor = [[UIColor clearColor] CGColor];
 self.emitterLayer.emitterPosition = CGPointMake(100, 100);
 self.emitterLayer.emitterSize = CGSizeMake(100, 100);
 [self.view.layer addSublayer:self.emitterLayer];
}


-(void) setupEmitterCell {

 self.emitterCell = [CAEmitterCell emitterCell];
 self.emitterCell.name = @"goldstar";
 self.emitterCell.contents = (id)[UIImage imageNamed:@"bokeh.png"].CGImage;
 self.emitterCell.birthRate = 66;
 self.emitterCell.lifetime = 0.5;;
 self.emitterCell.lifetimeRange = 0.6;
 self.emitterCell.velocity = 300;
 self.emitterCell.emissionRange = 2 * M_PI;
 self.emitterCell.spin = 0.0;
 self.emitterCell.spinRange = 4 * M_PI;
 self.emitterCell.color = [[UIColor colorWithRed:0.6 green:0.6 blue:0.6 alpha:1.0] CGColor];
 self.emitterCell.scale = 1.0;
 self.emitterCell.scaleRange = 1.0;
 self.emitterCell.emitterCells = [NSArray arrayWithObjects:self.emitterCell, nil];
}

Answer 1

我可能错了，但问题似乎是，你忘了告诉发射器它应该用什么细胞？也许使用[self.emitterLayer setEmitterCells:self.emitterCell];可能会有所帮助。