IOS实现签到特效(散花效果)的实例代码

#import <foundation/foundation.h>
/// 领取奖励成功
@interface rewardsuccess : nsobject
/**
 * 成功动画
 */
+ (void)show;

@end

#import "rewardsuccess.h"
#import "rewardsuccesswindow.h"
#define emittercolor_red [uicolor colorwithred:255/255.0 green:0 blue:139/255.0 alpha:1]
#define emittercolor_yellow [uicolor colorwithred:251/255.0 green:197/255.0 blue:13/255.0 alpha:1]
#define emittercolor_blue [uicolor colorwithred:50/255.0 green:170/255.0 blue:207/255.0 alpha:1]
@implementation rewardsuccess
+ (void)show
{
 uiwindow *window = [uiapplication sharedapplication].keywindow;
 uiview *backgroundview = [[uiview alloc] initwithframe:window.bounds];
 backgroundview.backgroundcolor = [uicolor colorwithred:0 green:0 blue:0 alpha:0.8];
 [window addsubview:backgroundview];
 rewardsuccesswindow *successwindow = [[rewardsuccesswindow alloc] initwithframe:cgrectzero];
 [backgroundview addsubview:successwindow];
 //缩放
 successwindow.transform=cgaffinetransformmakescale(0.01f, 0.01f);
 successwindow.alpha = 0;
 [uiview animatewithduration:0.4 animations:^{
 successwindow.transform = cgaffinetransformmakescale(1.0f, 1.0f);
 successwindow.alpha = 1;
 }];
 //3s 消失
 double delayinseconds = 3;
 dispatch_time_t delayinnanoseconds = dispatch_time(dispatch_time_now, delayinseconds * nsec_per_sec);
 dispatch_after(delayinnanoseconds, dispatch_get_main_queue(), ^(void){
 [uiview animatewithduration:0.4 animations:^{
  successwindow.transform = cgaffinetransformmakescale(.3f, .3f);
  successwindow.alpha = 0;
 }completion:^(bool finished) {
  [backgroundview removefromsuperview];
 }];
 });
 //开始粒子效果
 caemitterlayer *emitterlayer = addemitterlayer(backgroundview,successwindow);
 startanimate(emitterlayer);
}
caemitterlayer *addemitterlayer(uiview *view,uiview *window)
{
 //色块粒子
 caemittercell *subcell1 = subcell(imagewithcolor(emittercolor_red));
 subcell1.name = @"red";
 caemittercell *subcell2 = subcell(imagewithcolor(emittercolor_yellow));
 subcell2.name = @"yellow";
 caemittercell *subcell3 = subcell(imagewithcolor(emittercolor_blue));
 subcell3.name = @"blue";
 caemittercell *subcell4 = subcell([uiimage imagenamed:@"success_star"]);
 subcell4.name = @"star";
 caemitterlayer *emitterlayer = [caemitterlayer layer];
 emitterlayer.emitterposition = window.center;
 emitterlayer.emitterposition = window.center;
 emitterlayer.emittersize = window.bounds.size;
 emitterlayer.emittermode = kcaemitterlayeroutline;
 emitterlayer.emittershape = kcaemitterlayerrectangle;
 emitterlayer.rendermode = kcaemitterlayeroldestfirst;
 emitterlayer.emittercells = @[subcell1,subcell2,subcell3,subcell4];
 [view.layer addsublayer:emitterlayer];
 return emitterlayer;

}
void startanimate(caemitterlayer *emitterlayer)
{
 cabasicanimation *redburst = [cabasicanimation animationwithkeypath:@"emittercells.red.birthrate"];
 redburst.fromvalue = [nsnumber numberwithfloat:30];
 redburst.tovalue  = [nsnumber numberwithfloat: 0.0];
 redburst.duration = 0.5;
 redburst.timingfunction = [camediatimingfunction functionwithname:kcamediatimingfunctionlinear];
 cabasicanimation *yellowburst = [cabasicanimation animationwithkeypath:@"emittercells.yellow.birthrate"];
 yellowburst.fromvalue = [nsnumber numberwithfloat:30];
 yellowburst.tovalue  = [nsnumber numberwithfloat: 0.0];
 yellowburst.duration = 0.5;
 yellowburst.timingfunction = [camediatimingfunction functionwithname:kcamediatimingfunctionlinear];
 cabasicanimation *blueburst = [cabasicanimation animationwithkeypath:@"emittercells.blue.birthrate"];
 blueburst.fromvalue = [nsnumber numberwithfloat:30];
 blueburst.tovalue  = [nsnumber numberwithfloat: 0.0];
 blueburst.duration = 0.5;
 blueburst.timingfunction = [camediatimingfunction functionwithname:kcamediatimingfunctionlinear];
 cabasicanimation *starburst = [cabasicanimation animationwithkeypath:@"emittercells.star.birthrate"];
 starburst.fromvalue = [nsnumber numberwithfloat:30];
 starburst.tovalue  = [nsnumber numberwithfloat: 0.0];
 starburst.duration = 0.5;
 starburst.timingfunction = [camediatimingfunction functionwithname:kcamediatimingfunctionlinear];
 caanimationgroup *group = [caanimationgroup animation];
 group.animations = @[redburst,yellowburst,blueburst,starburst];
 [emitterlayer addanimation:group forkey:@"heartsburst"];
}
caemittercell *subcell(uiimage *image)
{
 caemittercell * cell = [caemittercell emittercell];
 cell.name = @"heart";
 cell.contents = (__bridge id _nullable)image.cgimage;
 // 缩放比例
 cell.scale = 0.6;
 cell.scalerange = 0.6;
 // 每秒产生的数量
 // cell.birthrate = 40;
 cell.lifetime = 20;
 // 每秒变透明的速度
 // snowcell.alphaspeed = -0.7;
 // snowcell.redspeed = 0.1;
 // 秒速
 cell.velocity = 200;
 cell.velocityrange = 200;
 cell.yacceleration = 9.8;
 cell.xacceleration = 0;
 //掉落的角度范围
 cell.emissionrange = m_pi;
 cell.scalespeed = -0.05;
 //// cell.alphaspeed = -0.3;
 cell.spin  = 2 * m_pi;
 cell.spinrange = 2 * m_pi;
 return cell;
}
uiimage *imagewithcolor(uicolor *color)
{
 cgrect rect = cgrectmake(0, 0, 13, 17);
 uigraphicsbeginimagecontext(rect.size);
 cgcontextref context = uigraphicsgetcurrentcontext();
 cgcontextsetfillcolorwithcolor(context, [color cgcolor]);
 cgcontextfillrect(context, rect);
 uiimage *image = uigraphicsgetimagefromcurrentimagecontext();
 uigraphicsendimagecontext();
 return image;
}
@end

#import <uikit/uikit.h>
/// 领取奖励成功提示框
@interface rewardsuccesswindow : uiview
@end

#import "rewardsuccesswindow.h"
static cgfloat successwindow_width = 270;
static cgfloat successwindow_hight = 170;
@implementation rewardsuccesswindow
 (instancetype)initwithframe:(cgrect)frame
{
 cgsize screensize = [uiscreen mainscreen].bounds.size;
 self = [super initwithframe:cgrectmake((screensize.width - successwindow_width)/2.0 , (screensize.height - successwindow_hight)/2.0, successwindow_width, successwindow_hight)];
 if (self)
 {
 [self configsubviews];
 }
 return self;
}
- (void)configsubviews
{
 self.backgroundcolor = [uicolor whitecolor];
 self.layer.cornerradius = 10;
 self.layer.maskstobounds = yes;
 uilabel *titlelabel = [[uilabel alloc] initwithframe:cgrectmake(0, 45, successwindow_width, 22)];
 titlelabel.text = @"恭喜您，领取成功！";
 titlelabel.font = [uifont systemfontofsize:19.0];
 titlelabel.textalignment = nstextalignmentcenter;
 [self addsubview:titlelabel];
 uilabel *explabel = [[uilabel alloc] initwithframe:cgrectmake(0, 75, successwindow_width, 43)];
 explabel.font = [uifont systemfontofsize:15];
 explabel.textalignment = nstextalignmentcenter;
 [self addsubview:explabel];
 nsstring *string = @"获得经验：+6";
 nsmutableattributedstring *attributedstring = [[nsmutableattributedstring alloc] initwithstring:string];
 [attributedstring addattribute:nsfontattributename value:[uifont systemfontofsize:15] range:nsmakerange(0, string.length)];
 [attributedstring addattribute:nsfontattributename value:[uifont fontwithname:@"markerfelt-thin" size:35] range:nsmakerange(5,2)];
 nsshadow *shadow =[[nsshadow alloc] init];
 shadow.shadowoffset = cgsizemake(1, 3);
 [attributedstring addattribute:nsshadowattributename value:shadow range:nsmakerange(5,2)];
 [attributedstring addattribute:nsforegroundcolorattributename value:[uicolor yellowcolor] range:nsmakerange(5,2)];
 explabel.attributedtext = attributedstring;
 uilabel *bottomlabel = [[uilabel alloc] initwithframe:cgrectmake(0, 135, successwindow_width, 22)];
 bottomlabel.text = @"可以在我的->我的奖励中查看获得奖励";
 bottomlabel.font = [uifont systemfontofsize:13.0];
 bottomlabel.textalignment = nstextalignmentcenter;
 bottomlabel.textcolor = [uicolor colorwithred:177/255.0 green:177/255.0 blue:177/255.0 alpha:1];
 [self addsubview:bottomlabel];
}

@end