粒子动画CAEmitterLayer CAEmitterCell

CAEmitterLayer属性

//装着CAEmitterCell对象的数组，被用于把粒子投放到layer上
@property(nullable, copy) NSArray *emitterCells;
//粒子产生系数，默认1.0
@property float birthRate;
//粒子生命周期
@property float lifetime;
//发射位置
@property CGPoint emitterPosition;
//发射源的z坐标位置
@property CGFloat emitterZPosition;
//发射源的大小
@property CGSize emitterSize;
//决定粒子形状的深度联系：emitter shape
@property CGFloat emitterDepth;

//发射源的形状
@property(copy) NSString *emitterShape;
- 取值
NSString * const kCAEmitterLayerPoint;
NSString * const kCAEmitterLayerLine;
NSString * const kCAEmitterLayerRectangle;
NSString * const kCAEmitterLayerCuboid;
NSString * const kCAEmitterLayerCircle;
NSString * const kCAEmitterLayerSphere;

//发射模式
@property(copy) NSString *emitterMode;
- 取值
NSString * const kCAEmitterLayerPoints;
NSString * const kCAEmitterLayerOutline;
NSString * const kCAEmitterLayerSurface;
NSString * const kCAEmitterLayerVolume;

//渲染模式
@property(copy) NSString *renderMode;
- 取值
NSString * const kCAEmitterLayerUnordered;
NSString * const kCAEmitterLayerOldestFirst;
NSString * const kCAEmitterLayerOldestLast;
NSString * const kCAEmitterLayerBackToFront;
NSString * const kCAEmitterLayerAdditive;

//不是多很清楚（粒子是平展在层上）
@property BOOL preservesDepth;
//粒子速度
@property float velocity;
//粒子的缩放比例
@property float scale;
//自旋转速度
@property float spin;
//用于初始化随机数产生的种子
@property unsigned int seed;

CAEmitterCell属性

//初始化方法
+ (instancetype)emitterCell;
//根据健 获 得 值
+ (nullable id)defaultValueForKey:(NSString *)key;
//是否 归 档莫 键值
- (BOOL)shouldArchiveValueForKey:(NSString *)key;
//粒子的名字
@property(nullable, copy) NSString *name;
//粒子是否被渲染
@property(getter=isEnabled) BOOL enabled;
//粒子参数的速度乘数因子
@property float birthRate;
//生命周期
@property float lifetime;
//生命周期范围
@property float lifetimeRange;
//发射的 z 轴方向的角度 
@property CGFloat emissionLatitude;
//x-y 平面的 发 射方向
@property CGFloat emissionLongitude;
//周 围发射角度
@property CGFloat emissionRange;
//速度
@property CGFloat velocity;
//速度范围
@property CGFloat velocityRange;
//粒子 x 方向的加速度分量
@property CGFloat xAcceleration;
//粒子 y 方向的加速度分量
@property CGFloat yAcceleration;
//粒子 z 方向的加速度分量
@property CGFloat zAcceleration;
//缩放比例
@property CGFloat scale;
//缩放比例范围
@property CGFloat scaleRange;
//缩放比例速度
@property CGFloat scaleSpeed;
//子旋转角度
@property CGFloat spin;
//子旋转角度范围
@property CGFloat spinRange;
//粒子的颜色
@property(nullable) CGColorRef color;
//一个粒子的 颜 色 red   能改 变 的范 围
@property float redRange;
//一个粒子的 颜 色 green   能改 变 的范 围
@property float greenRange;
//一个粒子的 颜 色 blue   能改 变 的范 围
@property float blueRange;
//一个粒子的 颜 色 alpha 能改 变 的范 围
@property float alphaRange;
//粒子 red 在生命周期内的改变速度
@property float redSpeed;
//粒子 green 在生命周期内的改变速度
@property float greenSpeed;
//粒子 blue 在生命周期内的改变速度
@property float blueSpeed;
//粒子透明度在生命周期内的改变速度
@property float alphaSpeed;
//是个 CGImageRef 的对象 , 既粒子要展现的图片
@property(nullable, strong) id contents;
//应该画在 contents 里的子 rectangle
@property CGRect contentsRect;
//定义了寄宿图的像素尺寸和视图大小的比例，默认情况下它是一个值为1.0的浮点数
@property CGFloat contentsScale;
//减小自己的大小
@property(copy) NSString *minificationFilter;
//不是很清楚好像增加自己的大小
@property(copy) NSString *magnificationFilter;
//减小大小的因子
@property float minificationFilterBias;
//粒子发射的粒子
@property(nullable, copy) NSArray *emitterCells;
//类似于层的继承的属性(不是很清楚)
@property(nullable, copy) NSDictionary *style;

例子

粒子效果.gif

.h文件
@interface EmitterButton : UIControl
/**是否选中***/
@property (assign,nonatomic,readonly) BOOL chose;
/**选中回调***/
@property (nonatomic, copy) void (^choseClick)(EmitterButton *button);

-(instancetype)initWithFrame:(CGRect)frame andNormalImage:(UIImage *)image andHighlightImage:(UIImage *)highlightImage andEffectImage:(UIImage *)EffImage;
@end

.m文件
#import "EmitterButton.h"
@interface EmitterButton ()
{
    UIImage *Nimage;
    UIImage *Himage;
    UIImage *Eimage;
    UIImageView *imageView;
    BOOL isChose;
    CAEmitterLayer *emitterLayer;
    CAEmitterCell *emitterCell;
}
@end
@implementation EmitterButton
-(instancetype)initWithFrame:(CGRect)frame{
    self=[super initWithFrame:frame];
    if (self) {
        Himage = [UIImage imageNamed:@"Zan"];
        Nimage = [UIImage imageNamed:@"UnZan"];
        Eimage = [UIImage imageNamed:@"EffectImage"];
        [self setUpSubviews];
    }
    return self;
}
-(instancetype)initWithFrame:(CGRect)frame andNormalImage:(UIImage *)image andHighlightImage:(UIImage *)highlightImage andEffectImage:(UIImage *)EffImage
{
    self = [super initWithFrame:frame];
    if (self) {
        Nimage = image;
        Himage = highlightImage;
        Eimage = EffImage;
        [self setUpSubviews];
    }
    return self;
}

-(void)setUpSubviews
{
    imageView = [[UIImageView alloc]init];
    imageView.frame = self.bounds;
    imageView.userInteractionEnabled = YES;
    [imageView setImage:Nimage];
    [self addSubview:imageView];
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(imageViewTap)];
    [imageView addGestureRecognizer:tap];
    
    emitterLayer = [CAEmitterLayer layer];
    //设置发射位置
    [emitterLayer setEmitterPosition:CGPointMake(CGRectGetWidth(self.frame)/2.0, CGRectGetHeight(self.frame)/2.0)];
    //设置发射源的大小
    [emitterLayer setEmitterSize:CGSizeMake(CGRectGetWidth(self.frame), CGRectGetHeight(self.frame))];
    //设置发射源的形状
    [emitterLayer setEmitterShape:kCAEmitterLayerCircle];
    //设置发射模式
    [emitterLayer setEmitterMode:kCAEmitterLayerOutline];
    [self.layer addSublayer:emitterLayer];
    
    emitterCell = [CAEmitterCell emitterCell];
    //设置粒子的名字
    [emitterCell setName:@"emitterButton"];
    //设置粒子速度
    [emitterCell setVelocity:50];
    //设置粒子速度范围
    [emitterCell setVelocityRange:50];
    //设置粒子参数的速度乘数因子
    [emitterCell setBirthRate:0];
    //设置粒子生命周期
    [emitterCell setLifetime:1.0];
    //设置粒子透明度在生命周期内的改变速度
    [emitterCell setAlphaSpeed:-1];
    //设置粒子要展现的图片,是个 CGImageRef 的对象
    [emitterCell setContents:(__bridge id)Eimage.CGImage];
    
    [emitterLayer setEmitterCells:@[emitterCell]];
}

-(void)imageViewTap{
    isChose = !isChose;
    [self setCurrentImage];
    imageView.bounds = CGRectZero;
    [UIView animateWithDuration:0.25 delay:0 options:0.3 animations:^{
        [imageView setBounds:self.bounds];
        if (isChose)
        {
            CABasicAnimation *baseAnimat = [CABasicAnimation animationWithKeyPath:@"emitterCells.emitterButton.birthRate"];
            [baseAnimat setFromValue:[NSNumber numberWithFloat:100]];
            [baseAnimat setToValue:[NSNumber numberWithFloat:0]];
            baseAnimat.duration = 0;
            baseAnimat.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];
            [emitterLayer addAnimation:baseAnimat forKey:@"effectButton"];
        }
    } completion:nil];
    
}
-(void)setCurrentImage
{
    if (isChose) {
        [imageView setImage:Himage];
    }else{
        [imageView setImage:Nimage];
    }
}

-(BOOL)chose
{
    return isChose;
}
@end

文章来自http://blog.csdn.net/hufengvip/article/details/7617042

粒子动画CAEmitterLayer CAEmitterCell

CAEmitterLayer属性

CAEmitterCell属性

例子

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