//

//  ViewController.m

//  CALayer12.22

//

//  Created by dc008 on 15/12/22.

//  Copyright © 2015年 崔晓宇. All rights reserved.

//

#import "ViewController.h"

#define WIDTH [UIScreen mainScreen].bounds.size.width

#define HEIGHT [UIScreen mainScreen].bounds.size.height

#define LayerWidth 50

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

CALayer *layer = [[CALayer alloc]init];

//设置宽高

layer.bounds = CGRectMake(0, 0, LayerWidth, LayerWidth);

layer.position = CGPointMake(WIDTH/2.0, HEIGHT/2.0);

layer.backgroundColor = [UIColor colorWithRed:0.3 green:0.2 blue:0.7 alpha:0.7].CGColor;

[self.view.layer addSublayer:layer];

//设置圆角

layer.cornerRadius = LayerWidth/ 2;

//设置阴影

layer.shadowColor = [UIColor grayColor].CGColor;

//阴影偏移量

layer.shadowOffset = CGSizeMake(2, 2);

//阴影透明度(0-1),默认是0

layer.shadowOpacity = 0.9;

NSLog(@"CALayer内存地址:%@",layer);

//(mao)锚点 (x和y的范围0-1)

//    layer.anchorPoint = CGPointMake(1, 1);

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

//获取点击位置

UITouch *touch = [touches anyObject];

NSLog(@"点击的位置是:%@",NSStringFromCGPoint([touch locationInView: self.view]));

//获取layer

NSLog(@"%@",self.view.layer.sublayers);

CALayer *layer = [[CALayer alloc]init];

layer = self.view.layer.sublayers[2];

layer.position = [touch locationInView:self.view];

//放大

CGFloat width = layer.bounds.size.width;

if (width == LayerWidth) {

width = LayerWidth * 4;

}

else {

width = LayerWidth;

}

layer.bounds = CGRectMake(0, 0, width, width);

layer.cornerRadius = width/2;//圆角是根据当前图形宽度来设置

}

@end