ios - CAEmitterLayer not Shown -


i'm adding uiview storyboard view controller , creating uiview class display particle effect. change uiview's class name of custom class created. code i'm using in uiview class not display particle effect expected. code follows:

- (void)drawrect:(cgrect)rect {     // drawing code          cgrect viewbounds = rect;      fireworksemitter.emitterposition = cgpointmake(viewbounds.size.width/2.0, viewbounds.size.height);     fireworksemitter.emittersize    = cgsizemake(viewbounds.size.width/2.0, 0.0);     fireworksemitter.emittermode    = kcaemitterlayeroutline;     fireworksemitter.emittershape   = kcaemitterlayerline;     fireworksemitter.rendermode     = kcaemitterlayeradditive;     fireworksemitter.seed = (arc4random()%100)+1;      // create rocket     caemittercell* rocket = [caemittercell emittercell];      rocket.birthrate        = 1.0;     rocket.emissionrange    = 0.25 * m_pi;  // variation in angle     rocket.velocity         = 380;     rocket.velocityrange    = 100;     rocket.yacceleration    = 75;     rocket.lifetime         = 1.02; // cannot set birthrate < 1.0 burst      rocket.contents         = (id) [[uiimage imagenamed:@"dazring"] cgimage];     rocket.scale            = 0.2;     rocket.color            = [[uicolor redcolor] cgcolor];     rocket.greenrange       = 1.0;      // different colors     rocket.redrange         = 1.0;     rocket.bluerange        = 1.0;     rocket.spinrange        = m_pi;     // slow spin        // burst object cannot seen, spawn sparks     // change color here, since sparks inherit value     caemittercell* burst = [caemittercell emittercell];      burst.birthrate         = 1.0;      // @ end of travel     burst.velocity          = 0;     burst.scale             = 2.5;     burst.redspeed          =-1.5;      // shifting     burst.bluespeed         =+1.5;      // shifting     burst.greenspeed        =+1.0;      // shifting     burst.lifetime          = 0.35;      // , finally, sparks      caemittercell* spark = [caemittercell emittercell];      spark.birthrate         = 400;     spark.velocity          = 125;     spark.emissionrange     = 2* m_pi;  // 360 deg     spark.yacceleration     = 75;       // gravity     spark.lifetime          = 3;      spark.contents          = (id) [[uiimage imagenamed:@"dazstaroutline"] cgimage];     spark.scalespeed        =-0.2;     spark.greenspeed        =-0.1;     spark.redspeed          = 0.4;     spark.bluespeed         =-0.1;     spark.alphaspeed        =-0.25;     spark.spin              = 2* m_pi;     spark.spinrange         = 2* m_pi;      // putting     fireworksemitter.emittercells   = [nsarray arraywithobject:rocket];     rocket.emittercells             = [nsarray arraywithobject:burst];     burst.emittercells              = [nsarray arraywithobject:spark];     [self.layer addsublayer:fireworksemitter];      [self setneedsdisplay]; }

1) remove of code drawrect, , put uiview subclass init method, or, since you're using storyboard, put awakefromnib:

- (void)awakefromnib {     [super awakefromnib];      cgrect viewbounds = rect;      fireworksemitter = (caemitterlayer*)self.layer;     fireworksemitter.emitterposition = cgpointmake(viewbounds.size.width/2.0, viewbounds.size.height);     fireworksemitter.emittersize    = cgsizemake(viewbounds.size.width/2.0, 0.0);     fireworksemitter.emittermode    = kcaemitterlayeroutline;     fireworksemitter.emittershape   = kcaemitterlayerline;     fireworksemitter.rendermode     = kcaemitterlayeradditive;     fireworksemitter.seed = (arc4random()%100)+1;      // create rocket     caemittercell* rocket = [caemittercell emittercell];      rocket.birthrate        = 1.0;     rocket.emissionrange    = 0.25 * m_pi;  // variation in angle     rocket.velocity         = 380;     rocket.velocityrange    = 100;     rocket.yacceleration    = 75;     rocket.lifetime         = 1.02; // cannot set birthrate < 1.0 burst      rocket.contents         = (id) [[uiimage imagenamed:@"dazring"] cgimage];     rocket.scale            = 0.2;     rocket.color            = [[uicolor redcolor] cgcolor];     rocket.greenrange       = 1.0;      // different colors     rocket.redrange         = 1.0;     rocket.bluerange        = 1.0;     rocket.spinrange        = m_pi;     // slow spin      caemittercell* burst = [caemittercell emittercell];     burst.birthrate         = 1.0;      // @ end of travel     burst.velocity          = 0;     burst.scale             = 2.5;     burst.redspeed          =-1.5;      // shifting     burst.bluespeed         =+1.5;      // shifting     burst.greenspeed        =+1.0;      // shifting     burst.lifetime          = 0.35;      caemittercell* spark = [caemittercell emittercell];     spark.birthrate         = 400;     spark.velocity          = 125;     spark.emissionrange     = 2* m_pi;  // 360 deg     spark.yacceleration     = 75;       // gravity     spark.lifetime          = 3;      spark.contents          = (id) [[uiimage imagenamed:@"dazstaroutline"] cgimage];     spark.scalespeed        =-0.2;     spark.greenspeed        =-0.1;     spark.redspeed          = 0.4;     spark.bluespeed         =-0.1;     spark.alphaspeed        =-0.25;     spark.spin              = 2* m_pi;     spark.spinrange         = 2* m_pi;      fireworksemitter.emittercells   = [nsarray arraywithobject:rocket];     rocket.emittercells             = [nsarray arraywithobject:burst];     burst.emittercells              = [nsarray arraywithobject:spark]; }

Comments

Post a Comment

Popular posts from this blog

Why does Ruby on Rails generate add a blank line to the end of a file? -

running rails generate controller foo home results in: class foocontroller < application controller def home end end (there's nothing on line in actual file, blank line) is there purpose blank line? it's common use newline indicate end of line, last line. many editors (like vi, use) add in newline silently. consensus text files (especially in unix world) should end in newline, , there have been problems historically if wasn't present. why should text files end newline? the tool used count lines in file "wc" counts newlines in file, without trailing newline show 3 instead of 4. it improves readability of templates used in generator. consider: https://github.com/rails/rails/blob/master/railties/lib/rails/generators/rails/controller/templates/controller.rb to remove trailing newline, template have last line of: end<% end -%> instead of: end <% end -%> that seems less readable me. the discussion below refers ...
Read more

keyboard - Smiles and long press feature in Android -

i've created android keyboard. how add features inserting smilies, , using long keypresses display symbols? to create long-press behavior allows select several options pop-up menu, follow guide (specifically pop-up menu section): http://developer.android.com/guide/topics/ui/menus.html smileys (also known emoticons) combination of keys, understood programs , parsed same way. have do, when clicks smiley face on keyboard, simulate pressing of key combination matching emoticon. example, when clicks smiley, should simulate key presses ':' , ')' :). here's list of emoticons: http://en.wikipedia.org/wiki/list_of_emoticons
Read more

node.js - Bad Request - node js ajax post -

i'm using express 3.0 , node v0.11.0. have button submits form , i'm using ajax post data json object node server. client code is: $('#contact').submit(function(e) { console.log('submit called'); var formdata = json.stringify($('form').serializeobject()); console.log(formdata); $.ajax({ url: "http://localhost:3000/savedata/", type: "post", datatype: 'json', data: {objectdata: formdata}, contenttype: "application/json", complete: function() { console.log('process complete'); }, success: function(data) { console.log('process sucess'); }, error: function() { console.log('process error'); }, }); return false; }); then on server: var express = require('express'); var app = express(); app.set('views', __dirname + '/views'); app.set('view engine', 'jade'); app.use(express.bodyparser());...
Read more