以前老是用别人写的banner滚动图，用起来总感觉不顺手，很多东西改了再改，结果改的面目全非，本着创新精神，博主今天自己封装了一个banner滚动图，这里资源来自爱卡汽车的banner滚动图，这不算侵权吧，仅仅写一个小Demo而已，首先来看下效果吧
下面看代码：
// // TopScrollView.h // 无限轮播 // // Created by 刘浩浩 on 16/6/12. // Copyright © 2016年 CodingFire. All rights reserved. // #import <UIKit/UIKit.h> @class TopScrollView; @protocol TopScrollViewDelegate <NSObject> /* *UIScrollViewDelegate 协议方法，把点击的图片的位置传给使用者 */ -(void)didClickScrollViewWithIndex:(NSInteger)index; @end @interface TopScrollView : UIView<UIScrollViewDelegate> @property (weak,nonatomic) id<TopScrollViewDelegate>delegate; /* *初始化scrollView及其部件 */ -(instancetype)initWithDataArray:(NSMutableArray *)dataArray; @end
// // TopScrollView.m // 无限轮播 // // Created by 刘浩浩 on 16/6/12. // Copyright © 2016年 CodingFire. All rights reserved. // #import "TopScrollView.h" #import "DataModel.h" #import "UIImageView+WebCache.h" @implementation TopScrollView { UIScrollView *_mainScrollView; UILabel *contentLabel; UIImageView *currentImageView; NSInteger _currentIndex; NSMutableArray *_dataArray; UIView *pageSubView; } /* *初始化部件，添加点击手势和定时器 */ -(instancetype)initWithDataArray:(NSMutableArray *)dataArray { if (self=[super initWithFrame:CGRectMake(0, 64, WIDTH, 170)]) { _mainScrollView = [[UIScrollView alloc] init]; _mainScrollView.frame = CGRectMake(0, 0, WIDTH, 170); _mainScrollView.contentSize = CGSizeMake(WIDTH*3, 170); _mainScrollView.backgroundColor = [UIColor whiteColor]; _mainScrollView.delegate = self; _mainScrollView.pagingEnabled = YES; _mainScrollView.userInteractionEnabled=YES; _mainScrollView.showsHorizontalScrollIndicator = NO; _mainScrollView.showsVerticalScrollIndicator=NO; _mainScrollView.bounces = NO; [_mainScrollView setContentOffset:CGPointMake(WIDTH, 0)]; [self addSubview:_mainScrollView]; _currentIndex = 0; _dataArray=[NSMutableArray arrayWithArray:dataArray]; [self setUpWithDataArray:_dataArray]; [self cretPageControlAndTitle]; // 手势 UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapClick)]; [self addGestureRecognizer:tap]; [NSTimer scheduledTimerWithTimeInterval:4 target:self selector:@selector(timerAction) userInfo:nil repeats:YES]; } return self; } /* *创建标题和pageControl，此处pageCOntrol为自定义的，如需要可修改为系统的，或更换图片即可 */ -(void)cretPageControlAndTitle { contentLabel = [[UILabel alloc] init]; contentLabel.frame = CGRectMake(0, self.frame.size.height-30, WIDTH, 30); contentLabel.textAlignment = NSTextAlignmentLeft; contentLabel.font=[UIFont systemFontOfSize:12]; contentLabel.text = ((DataModel *)[_dataArray firstObject]).title; contentLabel.backgroundColor = [UIColor blackColor]; contentLabel.textColor=[UIColor whiteColor]; contentLabel.alpha=0.6; [self addSubview:contentLabel]; pageSubView=[[UIView alloc]initWithFrame:CGRectMake(0, self.frame.size.height-30, WIDTH, 30)]; pageSubView.backgroundColor=[UIColor clearColor]; [self addSubview:pageSubView]; for(int i=0;i<_dataArray.count;i++) { UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"News_Pic_Number02@2x.png"]]; imageView.frame = CGRectMake(WIDTH-(_dataArray.count*12)-10+i*12, 11, 7, 7); if(i == 0) { imageView.image = [UIImage imageNamed:@"News_Pic_Number01@2x.png"]; } [pageSubView addSubview:imageView]; } } /* *定时器方法，使banner页无限轮播 */ -(void)timerAction { UIImageView *imageView = [pageSubView.subviews objectAtIndex:_currentIndex]; imageView.image = [UIImage imageNamed:@"News_Pic_Number02@2x.png"]; if (_currentIndex+1<_dataArray.count) { _currentIndex++; } else { _currentIndex=0; } [UIView animateWithDuration:1 animations:^{ [_mainScrollView setContentOffset:CGPointMake(WIDTH*2, 0)]; } completion:^(BOOL finished) { [_mainScrollView setContentOffset:CGPointMake(WIDTH, 0)]; [self setUpWithDataArray:_dataArray]; }]; contentLabel.text = ((DataModel *)[_dataArray objectAtIndex:_currentIndex]).title; UIImageView *imageView1 = [pageSubView.subviews objectAtIndex:_currentIndex]; imageView1.image = [UIImage imageNamed:@"News_Pic_Number01@2x.png"]; } /* *此处为scrollView的复用，比目前网上大部分的同类型控件油画效果好，只需要三张图片依次替换即可实现轮播，不需要有几张图就使scrollView的contentSize为图片数＊宽度 */ -(void)setUpWithDataArray:(NSArray *)dataArray { for(UIView *view in _mainScrollView.subviews) { if([view isKindOfClass:[UIImageView class]]) [view removeFromSuperview]; } // 中间图 currentImageView = [[UIImageView alloc] init]; [currentImageView sd_setImageWithURL:[NSURL URLWithString:((DataModel *)[dataArray objectAtIndex:_currentIndex]).imgURL]]; currentImageView.userInteractionEnabled=YES; currentImageView.frame = CGRectMake(WIDTH, 0, WIDTH, 170); [_mainScrollView addSubview:currentImageView]; // 左侧图 UIImageView *preImageView = [[UIImageView alloc] init]; NSString *imageStr = _currentIndex-1>=0?((DataModel *)[dataArray objectAtIndex:_currentIndex-1]).imgURL:((DataModel *)[dataArray lastObject]).imgURL; preImageView.userInteractionEnabled=YES; [preImageView sd_setImageWithURL:[NSURL URLWithString:imageStr]]; preImageView.frame = CGRectMake(0, 0, WIDTH, 170); [_mainScrollView addSubview:preImageView]; // 右侧 UIImageView *nextImageView = [[UIImageView alloc] init]; nextImageView.userInteractionEnabled=YES; NSString *imageStr1 = _currentIndex+1<dataArray.count?((DataModel *)[dataArray objectAtIndex:_currentIndex+1]).imgURL:((DataModel *)[dataArray firstObject]).imgURL; [nextImageView sd_setImageWithURL:[NSURL URLWithString:imageStr1]]; nextImageView.frame = CGRectMake(WIDTH*2, 0, WIDTH, 170); [_mainScrollView addSubview:nextImageView]; } /* *图片的点击响应方法 */ -(void)tapClick { if ([self.delegate respondsToSelector:@selector(didClickScrollViewWithIndex:)]) { [self.delegate didClickScrollViewWithIndex:_currentIndex]; } } /* *UIScrollViewDelegate 协议方法，拖动图片的处理方法 */ #pragma mark - UIScrollViewDelegate - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView { if(scrollView == _mainScrollView) { UIImageView *imageView = [pageSubView.subviews objectAtIndex:_currentIndex]; imageView.image = [UIImage imageNamed:@"News_Pic_Number02@2x.png"]; int index = scrollView.contentOffset.x/WIDTH; if(index>1) { _currentIndex = _currentIndex+1<_dataArray.count?_currentIndex+1:0; [UIView animateWithDuration:1 animations:^{ [_mainScrollView setContentOffset:CGPointMake(WIDTH*2, 0)]; } completion:^(BOOL finished) { [_mainScrollView setContentOffset:CGPointMake(WIDTH, 0)]; [self setUpWithDataArray:_dataArray]; }]; } else if(index<1) { _currentIndex = _currentIndex-1>=0?_currentIndex-1:_dataArray.count-1; [UIView animateWithDuration:1 animations:^{ [_mainScrollView setContentOffset:CGPointMake(0, 0)]; } completion:^(BOOL finished) { [_mainScrollView setContentOffset:CGPointMake(WIDTH, 0)]; [self setUpWithDataArray:_dataArray]; }]; } else NSLog(@"没滚动不做任何操作"); contentLabel.text = ((DataModel *)[_dataArray objectAtIndex:_currentIndex]).title; UIImageView *imageView1 = [pageSubView.subviews objectAtIndex:_currentIndex]; imageView1.image = [UIImage imageNamed:@"News_Pic_Number01@2x.png"]; } } /* // Only override drawRect: if you perform custom drawing. // An empty implementation adversely affects performance during animation. - (void)drawRect:(CGRect)rect { // Drawing code } */ @end
// // DataModel.h // 无限轮播 // // Created by 刘浩浩 on 16/6/12. // Copyright © 2016年 CodingFire. All rights reserved. // #import <Foundation/Foundation.h> @interface DataModel : NSObject /* *此模型不可省略，为的是传入图片链接，标题，链接地址，内容ID等数据 */ @property(nonatomic,strong)NSString *imgURL; @property(nonatomic,strong)NSString *title; @property(nonatomic,strong)NSString *webLink; @property(nonatomic,strong)NSString *contentID; @end
以上就是工程中的主要代码，下面附上下载地址，请自取banner滚动图自定义
