#import "HMViewController.h"

#import "HMWheelView.h"

@interface HMViewController ()

@property (nonatomic, weak) HMWheelView *wheelView;

@end

@implementation HMViewController

- (IBAction)start:(id)sender {

    [_wheelView startRotating];

}

- (IBAction)stop:(id)sender {

    [_wheelView stopRotating];

}

- (void)viewDidLoad

{

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    HMWheelView *wheel = [HMWheelView wheelView];

    wheel.center = self.view.center;

    [self.view addSubview:wheel];

    _wheelView = wheel;

}

- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end

#import "HMWheelView.h"

#import "HMWheelButton.h"

#define angle2radian(x) ((x) / 180.0 * M_PI)

@interface HMWheelView ()

@property (weak, nonatomic) IBOutlet UIImageView *rotationView;

@property (nonatomic, weak) UIButton *selectedButton;

@property (nonatomic, strong) CADisplayLink *link;

@end

@implementation HMWheelView

+ (instancetype)wheelView

{

    return [[NSBundle mainBundle] loadNibNamed:@"HMWheelView" owner:nil options:nil][];

}

// 还有没连号线

- (id)initWithCoder:(NSCoder *)aDecoder

{

    if (self = [super initWithCoder:aDecoder]) {

        NSLog(@"initWithCoder----%@",_rotationView);

    }

    return self;

}

// 连好线

#warning 添加按钮

- (void)awakeFromNib

{

    _rotationView.userInteractionEnabled = YES;

    // 裁剪的大图片

    UIImage *bigImage = [UIImage imageNamed:@"LuckyAstrology"];

    UIImage *selectedImage = [UIImage imageNamed:@"LuckyAstrologyPressed"];

    // 图片的尺寸

    CGFloat imageW =  * [UIScreen mainScreen].scale;

    CGFloat imageH =  * [UIScreen mainScreen].scale;

    for (int i = ; i < ; i++) {

        // 创建按钮

        HMWheelButton *button = [HMWheelButton buttonWithType:UIButtonTypeCustom];

        // 锚点

        button.layer.anchorPoint = CGPointMake(0.5, );

        // 位置

        button.layer.position = CGPointMake(self.bounds.size.width * 0.5, self.bounds.size.height * 0.5);

        // 旋转按钮

        button.layer.transform = CATransform3DMakeRotation(angle2radian(i * ), , , );

        // 尺寸

        button.bounds = CGRectMake(, , , );

        // 设置选中时候的背景图片

        [button setBackgroundImage:[UIImage imageNamed:@"LuckyRototeSelected"] forState:UIControlStateSelected];

        // 设置按钮的图片

        // image:裁剪的图片

        // rect:裁剪的尺寸

       CGRect clipRect = CGRectMake(i * imageW, , imageW, imageH);

       CGImageRef smallImage = CGImageCreateWithImageInRect(bigImage.CGImage, clipRect);

        [button setImage:[UIImage imageWithCGImage:smallImage] forState:UIControlStateNormal];

        // 设置选中的图片

        CGImageRef selectedSmallImage = CGImageCreateWithImageInRect(selectedImage.CGImage, clipRect);

        [button setImage:[UIImage imageWithCGImage:selectedSmallImage] forState:UIControlStateSelected];

        // 监听点击事件

        [button addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchDown];

        if (i == ) {

            [self btnClick:button];

        }

        [_rotationView addSubview:button];

    }

}

#warning 监听按钮点击

- (void)btnClick:(UIButton *)button

{

    _selectedButton.selected = NO;

    button.selected = YES;

    _selectedButton = button;

}

#warning 开始旋转

- (void)startRotating

{

    self.link.paused = NO;

}

- (void)stopRotating

{

    _link.paused = YES;

}

- (CADisplayLink *)link

{

    if (_link == nil) {

        CADisplayLink *link = [CADisplayLink displayLinkWithTarget:self selector:@selector(update)];

        [link addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];

        _link = link;

    }

    return _link;

}

// 60  45 / 60.0

- (void)update

{

    _rotationView.transform = CGAffineTransformRotate(_rotationView.transform, angle2radian( / 60.0));

}

- (IBAction)start:(id)sender {

    // 1.不要和用户交互

    _rotationView.userInteractionEnabled = NO;

    // 2.取消慢慢的旋转

    [self stopRotating];

    CABasicAnimation *anim = [CABasicAnimation animation];

    anim.keyPath = @"transform.rotation";

    anim.toValue = @(M_PI *  * );

    anim.duration = 0.5;

    anim.delegate = self;

    [_rotationView.layer addAnimation:anim forKey:nil];

}

- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag

{

    _rotationView.userInteractionEnabled = YES;

    // 让选中按钮回到最在上面的中间位置:

    CGFloat angle = atan2(_selectedButton.transform.b, _selectedButton.transform.a);

    NSLog(@"%f",angle);

    // 把我们的转盘反向旋转这么多°

    _rotationView.transform = CGAffineTransformMakeRotation(-angle);

    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)( * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{

        [self startRotating];

    });

}

@end

#import <UIKit/UIKit.h>

@interface HMWheelView : UIView

+ (instancetype)wheelView;

// 开始旋转

- (void)startRotating;

// 停止旋转

- (void)stopRotating;

@end

#import "HMWheelButton.h"

@implementation HMWheelButton

 //转盘  按钮

- (CGRect)imageRectForContentRect:(CGRect)contentRect

{

    CGFloat imageW = ;

    CGFloat imageH = ;

    CGFloat imageX = (contentRect.size.width - imageW) * 0.5;

    CGFloat imageY = ;

    return CGRectMake(imageX, imageY, imageW, imageH);

}

//去除高亮

- (void)setHighlighted:(BOOL)highlighted

{

}

@end

#import <UIKit/UIKit.h>

@interface HMWheelButton : UIButton

@end