CALayer的基本属性

CALayer *superLayer=self.view.layer;

//创建CALayer

CALayer *subLayer =[CALayer layer];

//添加到父图层

[superLayer addSublayer:subLayer];

//尺寸

subLayer.bounds =CGRectMake(0, 0, 200, 200);

//颜色

subLayer.backgroundColor =[UIColor greenColor].CGColor;

//位置

subLayer.position=CGPointMake(100, 100);

//锚点

subLayer.anchorPoint =CGPointMake(0 , 0);

//圆角

subLayer.cornerRadius =100;

//context内容

UIImage *image =[UIImage imageNamed:@"b"];

subLayer.contents =(__bridge id)(image.CGImage);

//超出范围剪裁

subLayer.masksToBounds =YES;

//边框颜色

subLayer.borderColor=[UIColor yellowColor].CGColor;

//边框大小

subLayer.borderWidth =5;

// 阴影

// 阴影和边界剪裁是不能同时使用的，因为阴影本身就是渲染到边界外面的

//再从新创建CALyer，这样可以添加阴影

CALayer *shadowLayer =[CALayer layer];

shadowLayer.bounds =subLayer.bounds;

shadowLayer.position =subLayer.position;

shadowLayer.anchorPoint = CGPointMake(0, 0);

//圆角

shadowLayer.cornerRadius =100;

// CALayer的默认背景色不是白色，而是透明色

shadowLayer.backgroundColor =[UIColor whiteColor].CGColor;

//阴影颜色

shadowLayer.shadowColor =[UIColor grayColor].CGColor;

//阴影偏移量

shadowLayer.shadowOffset =CGSizeMake(10, 10);

//阴影不透明度

shadowLayer.shadowOpacity =1;

//添加视图

[superLayer insertSublayer:shadowLayer below:subLayer];

//形变

//位移01

subLayer.transform =CATransform3DMakeTranslation(-100, 100, 0);

//位移02

subLayer.transform =CATransform3DMakeTranslation(100, -100, 0);

//放大，缩小

subLayer.transform=CATransform3DMakeScale(.5, .5, .5);

//旋转 (-1,0,1) 倒着转，不转，正着转;旋转中心以锚点为中心点

subLayer.transform =CATransform3DMakeRotation(-M_PI_4, -1, 0, 1);

CALayer *transLayer =[CALayer layer];

transLayer.bounds =CGRectMake(0, 0, 100, 100);

transLayer.position =CGPointMake(100, 100);

transLayer.backgroundColor =[UIColor brownColor].CGColor;

[self.view.layer addSublayer:transLayer];

//近大远小

CATransform3D trans =CATransform3DIdentity;

trans.m34 =-1/800.f;

subLayer.transform =trans;

trans =CATransform3DRotate(trans, M_PI_4, 0, -1, -1);

transLayer.transform =trans;

CALayer *textLayer =[CALayer layer];

textLayer.bounds =transLayer.bounds;

textLayer.position =transLayer.position;

textLayer.backgroundColor =[UIColor blueColor].CGColor;

[self.view.layer insertSublayer:textLayer below:transLayer];