#import@interface LoopView : UIView
@property (nonatomic, assign) int imgCount;
@end
#import "LoopView.h"@interface LoopView ()@property (nonatomic, strong) NSTimer *timer;
@property (nonatomic)CGPoint offSet;
@property (nonatomic,strong)NSTimer *repeatingTimer;
@end
@implementation LoopView
- (void)awakeFromNib{
[super awakeFromNib];
UIScrollView *scrollView = [[UIScrollView alloc]init];
scrollView.showsHorizontalScrollIndicator = NO;
scrollView.pagingEnabled = YES;
scrollView.userInteractionEnabled = YES;
scrollView.delegate = self;
scrollView.tag = 100;
[self addSubview:scrollView];
UIImageView *currentImageView = [[UIImageView alloc]init];
currentImageView.image = [UIImage imageNamed:@"1"];
[scrollView addSubview:currentImageView];
currentImageView.tag = 102;
UIImageView *nextImageView = [[UIImageView alloc]init];
nextImageView.image = [UIImage imageNamed:@"2"];
[scrollView addSubview:nextImageView];
nextImageView.tag = 103;
UIImageView *preImageView = [[UIImageView alloc]init];
preImageView.image = [UIImage imageNamed:@"5"];
[scrollView addSubview:preImageView];
preImageView.tag = 101;
UIPageControl *pageControl = [[UIPageControl alloc]init];
pageControl.numberOfPages = 6;
pageControl.currentPage = 0;
pageControl.tag = 104;
[self addSubview:pageControl];
self.timer = [NSTimer scheduledTimerWithTimeInterval:5.0f target:self selector:@selector(update:) userInfo:nil repeats:YES];
[[NSRunLoop mainRunLoop] addTimer:self.timer forMode:NSRunLoopCommonModes];
NSInvocationOperation *peration = [[NSInvocationOperation alloc]initWithTarget:self selector:@selector(update:) object:nil];
NSOperationQueue *queue = [[NSOperationQueue alloc]init];
[queue addOperation:peration];
}
// 调整按钮的frame最好在这个方法里面
- (void)layoutSubviews
{
[super layoutSubviews];
UIPageControl *pageControl = [self viewWithTag:104];
UIScrollView *scrollview = [self viewWithTag:100];
UIImageView *currentImageView = [self viewWithTag:102];
UIImageView *preImageView = [self viewWithTag:101];
UIImageView *nextImageView = [self viewWithTag:103];
CGFloat width = self.frame.size.width;
CGFloat hight = self.frame.size.height;
scrollview.contentOffset = CGPointMake(width, 0);
scrollview.frame = CGRectMake(0, 0, width, hight);
[scrollview setContentSize:CGSizeMake(width * imgCount, hight)];
currentImageView.frame = CGRectMake(width, 0, width, hight);
nextImageView.frame = CGRectMake(width * 2, 0, width, hight);
preImageView.frame = CGRectMake(0, 0, width, hight);
pageControl.frame = CGRectMake(self.bounds.size.width/2 - 40, self.bounds.size.height - 100, 80, 20);
}
- (void)update:(NSTimer *)timer{
CGFloat width = self.frame.size.width;
_offSet = CGPointMake(width, 0);
NSTimer *timerSecond = [NSTimer scheduledTimerWithTimeInterval:0.002 target:self selector:@selector(updateImage) userInfo:nil repeats:YES];／／0.002 更改图片速度
self.repeatingTimer = timerSecond;
}
- (void) updateImage{
UIScrollView *scrollview = [self viewWithTag:100];
_offSet.x += _offSet.x / 200;
[scrollview setContentOffset:_offSet animated:YES];
if (_offSet.x > self.frame.size.width * 2) {
[self.repeatingTimer invalidate];
self.repeatingTimer = nil;
}
}
#pragma mark -UISrollViewDelegate
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
[self.timer invalidate];
[self.repeatingTimer invalidate];
self.repeatingTimer = nil;
}
- (void) scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
self.timer = [NSTimer scheduledTimerWithTimeInterval:5.0f target:self selector:@selector(update:) userInfo:nil repeats:YES];
[[NSRunLoop mainRunLoop] addTimer:self.timer forMode:NSRunLoopCommonModes];
}
- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
UIScrollView *scrollview = [self viewWithTag:100];
UIImageView *currentImageView = [self viewWithTag:102];
UIImageView *preImageView = [self viewWithTag:101];
UIImageView *nextImageView = [self viewWithTag:103];
UIPageControl *pControl = (UIPageControl *)[self viewWithTag:104];
static int i = 1;
float offset = scrollview.contentOffset.x;
if (nextImageView.image == nil || preImageView.image == nil){
NSString *nextImgName = [NSString stringWithFormat:@"%d",i == imgCount ? 1 : i+1];
nextImageView.image = [UIImage imageNamed:nextImgName];
NSString *preImgName = [NSString stringWithFormat:@"%d", i == 1 ? imgCount : i-1];
preImageView.image = [UIImage imageNamed:preImgName];
}
if (offset == 0) {
currentImageView.image = preImageView.image;
scrollview.contentOffset = CGPointMake(scrollview.bounds.size.width,0);
preImageView.image = nil;
if (i == 1) {
i = imgCount;
pControl.currentPage = i - 1;
}else{
i = i - 1;
pControl.currentPage = i - 1;
}
}
if (offset == scrollview.bounds.size.width * 2) {
currentImageView.image = nextImageView.image;
scrollview.contentOffset = CGPointMake(scrollview.bounds.size.width, 0);
nextImageView.image = nil;
if (i == imgCount) {
i = 1;
pControl.currentPage = i - 1;
}else{
i += 1;
pControl.currentPage = i - 1;
}
}
}
@end
为什么用oc，swift2.3 到 3.0 改动较大，在Xcode7.3.1 和 Xcode8.0版本中改动较多。而此模块从网上下载下来就直接可以用。github连接 https://github.com/fanbo1101020133/Carousel-figure-Model 。
特点：1，自定义轮播图大小，拖View控件即可。在下图的class中加入LoopView。
2，无限轮播，任意多张图片，imgCount表示图片的个数。
3，可以改变轮播速度，文中已有标注。