核心动画2

// ViewController.m

// UI-NO-36-1 核心动画-2

// Created by 容伟 on 15/9/15.

#import "ViewController.h"

@interface ViewController (){

CALayer *myLayer;

CGFloat width;

CALayer *imageLayer;

}

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

self.view.backgroundColor = [UIColor whiteColor];

[self addLayer];

[self addImageLayer];

}

- (void)addLayer {

width = 100;

myLayer = [[CALayer alloc] init];

myLayer.backgroundColor = [UIColor whiteColor].CGColor;

myLayer.shadowOpacity = 1.0; // 阴影默认的透明度是 0

myLayer.shadowColor = [UIColor yellowColor].CGColor;

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

myLayer.position = self.view.center;

myLayer.borderWidth = 2;

myLayer.borderColor = [UIColor blackColor].CGColor;

myLayer.cornerRadius = width/2;

myLayer.shadowOffset = CGSizeMake(-1, -1);

// myLayer.contents = (__bridge id)([UIImage imageNamed:@"12.jpg"].CGImage);

// myLayer.masksToBounds = YES;

[self.view.layer addSublayer:myLayer];

}

- (void)addImageLayer {

imageLayer = [[CALayer alloc] init];

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

imageLayer.position = self.view.center;

imageLayer.cornerRadius = myLayer.cornerRadius;

imageLayer.contents = (__bridge id)([UIImage imageNamed:@"12.jpg"].CGImage);

imageLayer.masksToBounds = YES;

imageLayer.borderWidth = 2;

imageLayer.borderColor = [UIColor whiteColor].CGColor;

[self.view.layer addSublayer:imageLayer];

}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

UITouch *touch = [touches anyObject];

[self changeStateWith:[touch locationInView:self.view]];

}

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

UITouch *touch = [touches anyObject];

[self changeStateWith:[touch locationInView:self.view]];

}

- (void)changeStateWith:(CGPoint)position {

myLayer.position = position;

width = width == 100 ? 300:100;

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

myLayer.cornerRadius = width/2;

imageLayer.position = position;

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

imageLayer.cornerRadius = myLayer.cornerRadius;

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end