//  WheelButton.m//  12-转盘(了解)#import "WheelButton.h"@implementation WheelButton// 设置UIImageView的尺寸// contentRect:按钮的尺寸- (CGRect)imageRectForContentRect:(CGRect)contentRect{    // 计算UIImageView控件尺寸    CGFloat imageW = 40;    CGFloat imageH = 46;    CGFloat imageX = (contentRect.size.width - imageW) * 0.5;    CGFloat imageY = 20;    return CGRectMake(imageX, imageY, imageW, imageH);}// 取消高亮状态- (void)setHighlighted:(BOOL)highlighted{    }@end

////  WheelView.h//  12-转盘(了解)#import <UIKit/UIKit.h>@interface WheelView : UIView+ (instancetype)wheelView;- (void)start;- (void)pause;@end

////  WheelView.m//  12-转盘(了解)#import "WheelView.h"#import "WheelButton.h"@interface WheelView ()@property (weak, nonatomic) IBOutlet UIImageView *centerView;@property (nonatomic, weak) UIButton *selBtn;@end@implementation WheelView+ (instancetype)wheelView{   return  [[NSBundle mainBundle] loadNibNamed:@"WheelView" owner:nil options:nil][0];}// 注意这个方法只是加载xib的时候会调用，但是并没有连好线//- (id)initWithCoder:(NSCoder *)aDecoder//{//    if (self = [super initWithCoder:aDecoder]) {//        NSLog(@"-%@",_centerView);//    }//    return self;//}- (void)awakeFromNib{    _centerView.userInteractionEnabled = YES;    CGFloat btnW = 68;    CGFloat btnH = 143;         CGFloat wh = self.bounds.size.width;        // 加载大图片    UIImage *bigImage = [UIImage imageNamed:@"LuckyAstrology"];            // 加载大图片    UIImage *selBigImage = [UIImage imageNamed:@"LuckyAstrologyPressed"];        // 获取当前使用的图片像素和点的比例    CGFloat scale = [UIScreen mainScreen].scale;    CGFloat imageW = bigImage.size.width / 12 * scale;    CGFloat imageH = bigImage.size.height * scale;    // CGImageRef image:需要裁减的图片    // rect：裁减区域    // 裁减区域是以像素为基准//    CGImageCreateWithImageInRect(CGImageRef image, CGRect rect)        // 添加按钮    for (int i = 0; i < 12; i++) {        WheelButton *btn = [WheelButton buttonWithType:UIButtonTypeCustom];                // 设置按钮的位置        btn.layer.anchorPoint = CGPointMake(0.5, 1);                btn.bounds = CGRectMake(0, 0, btnW, btnH);                btn.layer.position = CGPointMake(wh * 0.5, wh * 0.5);                        // 按钮的旋转角度        CGFloat radion = (30 * i) / 180.0 * M_PI;                btn.transform = CGAffineTransformMakeRotation(radion);                [_centerView addSubview:btn];                // 加载按钮的图片        // 计算裁减区域        CGRect clipR = CGRectMake(i * imageW, 0, imageW, imageH);                // 裁减图片        CGImageRef imgR =  CGImageCreateWithImageInRect(bigImage.CGImage, clipR);                UIImage *image = [UIImage imageWithCGImage:imgR];                // 设置按钮的图片        [btn setImage:image forState:UIControlStateNormal];                // 设置选中状态下图片        imgR = CGImageCreateWithImageInRect(selBigImage.CGImage, clipR);        image = [UIImage imageWithCGImage:imgR];                // 设置按钮的图片        [btn setImage:image forState:UIControlStateSelected];                // 设置选中背景图片        [btn setBackgroundImage:[UIImage imageNamed:@"LuckyRototeSelected"] forState:UIControlStateSelected];                // 监听按钮的点击        [btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];                // 默认选中第一个        if (i == 0) {            [self btnClick:btn];        }                }}- (void)btnClick:(UIButton *)btn{    _selBtn.selected = NO;    btn.selected = YES;    _selBtn = btn;}#pragma mark - 开始旋转- (void)start{    CABasicAnimation *anim = [CABasicAnimation animation];        anim.keyPath = @"transform.rotation";        anim.toValue = @(M_PI * 2);        anim.duration = 2;        anim.repeatCount = MAXFLOAT;        [_centerView.layer addAnimation:anim forKey:nil];}#pragma mark - 暂停旋转- (void)pause{    }@end