2016-1-10 组动画学习 动画实例

//
//  ViewController.m
//  车晓迪demo
//
//  Created by Mac on 16/1/11.
//  Copyright © 2016年 Mac. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIImageView *circleView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    // 添加三个扇形按钮
    for (int i = 0;  i< 3; i ++) {
        NSString *imgName = [NSString stringWithFormat:@"circle%d",i +1];
        UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom ];
        UIImage *img = [UIImage imageNamed:imgName];
        [btn setBackgroundImage:img forState:UIControlStateNormal];
        // 因为给定按钮图片的frame已经和背景图片的尺寸是对应好的，此处需要注意一下
        btn.frame = self.circleView.bounds;
        [self.circleView addSubview:btn];
    }
    
    
    // 向背景中添加中心按钮
    UIButton *centerBtn = [UIButton buttonWithType:UIButtonTypeCustom];
    [centerBtn setBackgroundImage:[UIImage imageNamed:@"home_btn_dealer_had_bind"] forState:UIControlStateNormal];
    // 添加进去
    [self.view addSubview:centerBtn];
    centerBtn.bounds = CGRectMake(0, 0, 112, 112);
    centerBtn.center = self.circleView.center;
    [centerBtn addTarget:self action:@selector(centerBtnClick:) forControlEvents:(UIControlEventTouchUpInside)];
    
}
- (void)centerBtnClick:(UIButton *)centerBtn
{
    CGFloat currentAlpha = self.circleView.alpha;
    if (currentAlpha  == 1) {
        self.circleView.alpha =0;
    }else{
        self.circleView.alpha =1;
    }
    // 创建组动画
    CAAnimationGroup *groupAni = [CAAnimationGroup animation];
    // 创建核心动画
      // 隐藏动画
    CABasicAnimation *opacityAni = [CABasicAnimation animation];
    opacityAni.keyPath = @"opacity";
    // 缩放动画
    CAKeyframeAnimation *scaleAni = [CAKeyframeAnimation animation];
    scaleAni.keyPath = @"transform.scale";
    // 旋转动画
    CABasicAnimation *rotationAni = [CABasicAnimation animation];
    rotationAni.keyPath = @"transform.rotation";
    

    if (currentAlpha == 1) {// 需要隐藏
        opacityAni.fromValue = @1;
        opacityAni.toValue = @0;
        scaleAni.values = @[@1,@1.2,@0];
        rotationAni.fromValue =@[@0];
        rotationAni.toValue = @[@(M_PI_4)];
    }else{// 需要显示
        opacityAni.fromValue = @0;
        opacityAni.toValue = @1;
        scaleAni.values = @[@0,@1.2,@1];
        rotationAni.fromValue =@[@(M_PI_4)];
        rotationAni.toValue = @[@0];

    }
    groupAni.animations = @[opacityAni,scaleAni,rotationAni];
    groupAni.duration = 2;
    [self.circleView.layer addAnimation:groupAni forKey:nil];
    
}

@end