//此動畫效果分三個階段 程實原創(chuàng)
//1阱扬、從白色變?yōu)榛疑?br>
程實原創(chuàng)
//2幽污、灰色變?yōu)殚偕僮優(yōu)榛疑就矗底魅?程實原創(chuàng)
//3痢甘、會后從灰色變?yōu)榘咨?br>
程實原創(chuàng)
define RGBCOLOR(r,g,b) [UIColor colorWithRed:(r)/255.0f green:(g)/255.0fblue:(b)/255.0f alpha:1]
//此時做背景色漸變一定用CGColor
//要使用的三個顏色
CGColorRef originColor = [UIColor whiteColor].CGColor;
CGColorRef darkGray = RGBCOLOR(207, 205, 205).CGColor;
CGColorRef orange = RGBCOLOR(240, 221, 185).CGColor;
CGFloat
duration = 0.75
;
//1、從白色變?yōu)榛疑?br>
程實原創(chuàng)
CABasicAnimation *anim1 = [CABasicAnimationanimationWithKeyPath:@"backgroundColor"];
anim1.duration = duration;
anim1.fromValue = (id)originColor;
anim1.toValue = (id)darkGray;
//填充效果：動畫結(jié)束后茉贡，動畫將保持最后的表現(xiàn)狀態(tài)
anim1.fillMode = kCAFillModeForwards;
anim1.removedOnCompletion = NO;
anim1.beginTime = 0.0f;
//下面介紹一下fillMode這個枚舉
kCAFillModeRemoved 動畫結(jié)束后塞栅，將會移除掉做的動畫效果
kCAFillModeForwards 動畫結(jié)束后，動畫將保持最后的表現(xiàn)狀態(tài)
kCAFillModeBackwards 與kCAFillModeForwards相對應(yīng)
kCAFillModeBoth 是kCAFillModeForwards和kCAFillModeBackwards的結(jié)合
kCAFillModeFrozen 4.0之后就不推薦使用了腔丧。
CABasicAnimation *anim = [CABasicAnimationanimationWithKeyPath:@"backgroundColor"];
anim.duration = duration;
anim.fromValue = (id)darkGray;
anim.toValue = (id)orange;
anim.repeatCount = 3;
anim.autoreverses = YES;
//此時anim.removedOnCompletion和anim.fillMode設(shè)不設(shè)置都行放椰。因為會被middleGroup的參數(shù)覆蓋
anim.removedOnCompletion = NO;
anim.fillMode = kCAFillModeBoth;
anim.beginTime = 0.0f;
CAAnimationGroup * middleGroup = [CAAnimationGroup animation];
//一次動畫用時duration作烟，往返乘以2，做三次砾医，用時*3拿撩，所以是6倍
middleGroup.duration = duration*6;
middleGroup.animations = @[anim];
middleGroup.removedOnCompletion = NO;
//此autoreverses設(shè)為yes則會坐動畫還原
middleGroup.autoreverses = YES;
middleGroup.fillMode = kCAFillModeForwards;
//設(shè)置此動畫的開始時間
middleGroup.beginTime = duration;
//變回原來顏色
CABasicAnimation *anim3 = [CABasicAnimationanimationWithKeyPath:@"backgroundColor"];
anim3.duration = duration;
anim3.fromValue = (id)darkGray;
anim3.toValue = (id)originColor;
anim3.removedOnCompletion = NO;
anim3.beginTime = duration * 7;
anim3.fillMode = kCAFillModeForwards;
CAAnimationGroup * theGroup = [CAAnimationGroup animation];
theGroup.duration = duration*8;
theGroup.animations = @[anim1,middleGroup,anim3];
theGroup.removedOnCompletion = NO;
theGroup.fillMode = kCAFillModeBoth;
[self.holderView.layer addAnimation:theGroup forKey:@"backgroundColor"];
