练习实现效果:
挑战自我练习:
一.CAReplicatorLayer属性
@property NSInteger instanceCount;
要创建的拷贝数,可以做成动画
@property BOOL preservesDepth;
定义这个层是否将它的子层压平到它的平面上不(也就是说，它是否与转换层相似,默认NO)如果是，则应用标准限制(参见CATransformLayer.h
@property CFTimeInterval instanceDelay;
延时多久创建一个映射layer
@property CATransform3D instanceTransform;
创建映射的CATransform3D位置变化
@property(nullable) CGColorRef instanceColor;
在原对象的基础上添加的颜色,可做动画
@property float instanceRedOffset;
@property float instanceGreenOffset;
@property float instanceBlueOffset;
@property float instanceAlphaOffset;
在原对象基础颜色上做变化,可做动画
二.实现效果
1.创建CAReplicatorLayer对象并设置响应属性
CAReplicatorLayer *replicator = [CAReplicatorLayer layer];
replicator.frame = CGRectMake(0, 100, KScreen_W / 4.0f, KScreen_W / 4.0f);
[self.view.layer addSublayer:replicator];
//映射layer对象的次数
replicator.instanceCount = 10;
//创建CATransform3D对象设置位置依次变化
CATransform3D transform = CATransform3DIdentity;
//每次角度变化2*M_PI / 10 ,Z轴稍微变化为止否则会重叠
transform = CATransform3DRotate(transform, M_PI / 5.0, 0, 0, 0.001);
replicator.instanceTransform = transform;
//设置颜色渐变
replicator.instanceBlueOffset = -0.2;
replicator.instanceGreenOffset = -0.2;
2.创建源对象,并设置给CAReplicatorLayer对象
UIBezierPath *bezierPath = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(KScreen_W / 8.0f - 2.5, 20.0f, 5.0f, 5.0f)];
maskLayer = [CAShapeLayer layer];
maskLayer.fillColor = [UIColor redColor].CGColor;
maskLayer.path = bezierPath.CGPath;
maskLayer.fillColor = [UIColor colorWithWhite:0.9 alpha:1].CGColor;
maskLayer.fillRule = kCAFillRuleEvenOdd;
[replicator addSublayer:maskLayer];
3.做旋转动画
CABasicAnimation* rotationAnimation;
rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
rotationAnimation.toValue = [NSNumber numberWithFloat: M_PI / 10 - 0.001 ];
rotationAnimation.duration = 0.05;
rotationAnimation.cumulative = YES;
rotationAnimation.repeatCount = CGFLOAT_MAX;
[replicator addAnimation:rotationAnimation forKey:@"aa"];
Copyright © 2017年ZaneWangWang. All rights reserved.
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