記錄
https://github.com/nicklockwood/iCarousel

測試自己想要的效果類似 iCarouselTypeInvertedWheel

#import "iCarousel.h"
@interface ViewController ()<iCarouselDataSource,iCarouselDelegate>
/* <#描述#> */
@property (nonatomic, strong) iCarousel    * myCarousel;
@property (nonatomic, strong) NSMutableArray    * dataSource;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    [self.view addSubview:self.myCarousel];
}

- (iCarousel *)myCarousel {
    
    if (!_myCarousel) {
        _myCarousel = [[iCarousel alloc] initWithFrame:CGRectMake(0, 100, self.view.frame.size.width, 200)];
        _myCarousel.dataSource = self;
        _myCarousel.delegate = self;
        _myCarousel.bounces = NO;
        _myCarousel.pagingEnabled = YES;
        _myCarousel.type = iCarouselTypeInvertedWheel;
        _myCarousel.layer.borderColor = UIColor.redColor.CGColor;
        _myCarousel.layer.borderWidth = 1;
    }
    return _myCarousel;
}
#pragma mark - iCarouselDataSource

- (NSUInteger)numberOfItemsInCarousel:(iCarousel *)carousel {
    return 10;
}

- (UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSUInteger)index reusingView:(UIView *)view {
    if (view == nil) {
        view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 50, 50)];
        view.backgroundColor = UIColor.redColor;
    }
    
    return view;
}

#pragma mark - iCarouselDelegate
- (CGFloat)carousel:(iCarousel *)carousel valueForOption:(iCarouselOption)option withDefault:(CGFloat)value
{
    switch (option)
    {
        case iCarouselOptionWrap:
        {
            return YES;
        }
        case iCarouselOptionFadeMax:
        {
            if (carousel.type == iCarouselTypeCustom)
            {
                return 0.0f;
            }
            return value;
        }
        case iCarouselOptionArc:
        {
            return 2 * M_PI * 0.35;
        }
        case iCarouselOptionRadius:
        {
            return value * 1.8;
        }
        case iCarouselOptionTilt:
        {
            return 1;
        }
        case iCarouselOptionSpacing:
        {
            return value * 1;
        }
        default:
        {
            return value;
        }
    }
}

//- (CATransform3D)carousel:(iCarousel *)carousel itemTransformForOffset:(CGFloat)offset baseTransform:(CATransform3D)transform {
//    
//    static CGFloat max_sacle = 1.0f;
//    static CGFloat min_scale = 0.6f;
//    if (offset <= 1 && offset >= -1) {
//        float tempScale = offset < 0 ? 1+offset : 1-offset;
//        float slope = (max_sacle - min_scale) / 1;
//        
//        CGFloat scale = min_scale + slope*tempScale;
//        transform = CATransform3DScale(transform, scale, scale, 1);
//    }else{
//        transform = CATransform3DScale(transform, min_scale, min_scale, 1);
//    }
//    
//    return CATransform3DTranslate(transform, offset * self.myCarousel.itemWidth * 1.4, 0.0, 0.0);
//}

- (void)carousel:(iCarousel *)carousel didSelectItemAtIndex:(NSInteger)index {
//    [self showHudTipStr:[NSString stringWithFormat:@"點擊了第%ld張圖片",(long)index]];
}