iOS based on Caemitterlayer of snowflakes, fireworks, flames, love and other effects demo (turn)

 Reprinted from: http://blog.csdn.net/mad2man/article/details/16898369Category: Cocoa SDK2013-11-23 11:52 388 People read comments (0) favorite reports

Demo function: Based on Caemitterlayer snowflakes, fireworks, flames, love and other effects.

Demo Description: Based on the core animation particle emission system, particles are initialized with Caemittercell. The particles are drawn on the background layer box boundary

Demo screenshot:

Emitterposition: Launch position

Emittersize: The size of the transmitting source;

Emittermode: Launch mode

1. NSString * Const kcaemitterlayerpoints;
2. NSString * Const Kcaemitterlayeroutline;
3. NSString * Const Kcaemitterlayersurface;
4. NSString * Const Kcaemitterlayervolume;

Copy code Emittershape: The shape of the emitter source:

1. NSString * Const Kcaemitterlayerpoint;
2. NSString * Const Kcaemitterlayerline;
3. NSString * Const Kcaemitterlayerrectangle;
4. NSString * Const kcaemitterlayercuboid;
5. NSString * Const kcaemitterlayercircle;
6. NSString * Const Kcaemitterlayersphere;

Copy code Rendermode: Render Mode:

1. NSString * Const kcaemitterlayerunordered;
2. NSString * Const Kcaemitterlayeroldestfirst;
3. NSString * Const Kcaemitterlayeroldestlast;
4. NSString * Const Kcaemitterlayerbacktofront;
5. NSString * Const kcaemitterlayeradditive;

Copy Code properties:

birthrate: particle generation coefficient, default 1.0;

Emittercells: An array of Caemittercell objects that are used to put particles on a layer;

Emitterdepth: Determining the depth of particle shape contact: emitter shape

Emitterzposition: the z-coordinate position of the transmitting source;

Lifetime: Particle life cycle

Preservesdepth: Not much clear (particles are flattened on the layer)


Scale: The scaling ratio of the particles:

Seed: Used to initialize seeds generated by random numbers

Spin: self-rotating speed

Velocity: particle velocity

Caemittercell

Caemittercell the particles emitted from the caemitterlayer; The emitter cell defines the direction of the particle emission.

Alpharange: The extent to which a particle's color alpha can change;

Alphaspeed: The speed at which particle transparency changes over the life cycle;

birthrate: Velocity multiplier factor for particle parameters; number of particles emitted per second

Bluerange: The color of a particle blue can change the range;

Bluespeed: The speed at which particle blue changes over the life cycle;

Color: The colors of the particles

Contents: is a Cgimageref object, both particles to show the picture;

Contentsrect: Should be drawn in the contents of the sub-rectangle:

Emissionlatitude: Angle of the z-axis direction of the launch

The direction of transmission of emissionlongitude:x-y plane

Emissionrange: The angle of the surrounding emission

Emittercells: particles emitted by a particle

Enabled: whether particles are rendered

Greenrange: The color of a particle green can change the range;

Greenspeed: The speed at which particle green changes over the life cycle;

Lifetime: Life cycle

Lifetimerange: Life cycle Range lifetime= lifetime (+/-) Lifetimerange

Magnificationfilter: Not so clear as to increase your size

Minificatonfilter: Reduce your size

Minificationfilterbias: Reducing the size factor

Name: the names of the particles

Redrange: The color of a particle red can change the range;

RedSpeed; The speed at which particle red changes over the life cycle;

Scale: Zoom:

Scalerange: scale scale range;

Scalespeed: Scale speed:

Spin: Sub-rotation angle

Spinrange: Sub-rotation angle range

Style: Not very clear:

Velocity: Velocity

Velocityrange: Speed Range

Xacceleration: Particle x-direction acceleration component

Yacceleration: Acceleration component in Y-direction of particles

Zacceleration: Acceleration component in Z-direction of particles

-(void) viewdidload

{

[Super Viewdidload];

Caemitterlayer *snowemitter = [Caemitterlayer layer];

Snowemitter.emitterposition = Cgpointmake (self.view.bounds.size.width/2.0,-30);

Snowemitter.emittersize = Cgsizemake (self.view.bounds.size.width, 0.0);

Snowemitter.emittermode = Kcaemitterlayeroutline;

Snowemitter.emittershape = Kcaemitterlayerline;

Caemittercell *snowflake = [Caemittercell Emittercell];

snowflake.birthrate = 2.0;

Snowflake.lifetime = 120.0;

snowflake.velocity =-10;

Snowflake.velocityrange = 10;

Snowflake.yacceleration = 2;

Snowflake.emissionrange = 0.5 * M_PI;

Snowflake.spinrange = 0.25 * M_PI;

Snowflake.contents = (ID) [[UIImage imagenamed:@ "Dazflake"] cgimage];

Snowflake.color = [[Uicolor colorwithred:0.600 green:0.658 blue:0.743 alpha:1.000] cgcolor];

Snowemitter.shadowopacity = 1.0;

Snowemitter.shadowradius = 0.0;

Snowemitter.shadowoffset = Cgsizemake (0.0, 1.0);

Snowemitter.shadowcolor = [[Uicolor blackcolor] cgcolor];

Snowemitter.emittercells = [Nsarray arraywithobject:snowflake];

[Self.view.layer Insertsublayer:snowemitter above:0];

Do any additional setup after loading the view.

}