OC封装的轮播图->只用调用即可

来源：互联网发布：json 数组如何表示编辑：程序博客网时间：2024/06/03 11:42

先来使用方法

1.//创建显示本地图片view

UIView *imageScorll=[WTImageScroll ShowLocationImageScrollWithFream:CGRectMake(0, 0, SCREENWIDTH, 200) andImageArray:array andBtnClick:^(NSInteger tagValue) {NSLog(@"点击的图片----%@",@(tagValue));

 self.didSelectedImageIndex(tagValue)
}];

2.//创建显示网络图片view

UIView *imageScorll=[WTImageScroll ShowNetWorkImageScrollWithFream:CGRectMake(0, 20, SCREENWIDTH, 200) andImageArray:netArray andBtnClick:^(NSInteger tagValue) {    NSLog(@"点击的图片--%@",@(tagValue));

     self.didSelectedImageIndex(tagValue)
    }];

3.//添加到父视图

[self.view addSubview:imageScorll];

4.//清楚网络图片的缓存

[WTImageScroll clearNetImageChace];

#import <UIKit/UIKit.h>
typedef enum{
    
    ImageShowStyleLocation=0,
    ImageShowStyleNetwork=1
    
}ImageShowStyle;
typedef void (^BtnClickBlock)(NSInteger tagValue);
@interface WTImageScroll : UIView<UIScrollViewDelegate>
/**
 *显示本地图片
 *rect:在父视图中的位置
 *array:加载的图片数组
 *btnClick:点击图片回调
 */
+(UIView *)ShowLocationImageScrollWithFream:(CGRect)rect andImageArray:(NSArray *)array andBtnClick:(BtnClickBlock)btnClick ;
/**
 *显示网络图片
 *rect:在父视图中的位置
 *array:加载的图片数组--(网络图片地址)
 *btnClick:点击图片回调
 */
+(UIView *)ShowNetWorkImageScrollWithFream:(CGRect)rect andImageArray:(NSArray *)array andBtnClick:(BtnClickBlock)btnClick ;
/**
 *清理网络缓存到内存中的图片
 */
+(void)clearNetImageChace;
@end

.m

#import "WTImageScroll.h"
#import <CommonCrypto/CommonDigest.h>
#pragma  mark 创建md5加密
@interface NSString (MD5)
//返回一个当前字符串md5加密后的结果
- (NSString* )md5;
@end
@implementation NSString (MD5)
- (NSString* )md5 {
    CC_MD5_CTX md5;
    CC_MD5_Init (&md5);
    CC_MD5_Update (&md5, [self UTF8String], (CC_LONG)[self length]);
    
    unsigned char digest[CC_MD5_DIGEST_LENGTH];
    CC_MD5_Final (digest, &md5);
    NSString *s = [NSString stringWithFormat: @"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
                   digest[0],  digest[1],
                   digest[2],  digest[3],
                   digest[4],  digest[5],
                   digest[6],  digest[7],
                   digest[8],  digest[9],
                   digest[10], digest[11],
                   digest[12], digest[13],
                   digest[14], digest[15]];
    return s;
}
@end
@implementation WTImageScroll
{
    NSArray *imgArray;  //图片数组
    UIPageControl *pageView;//分页
    BtnClickBlock btnClicks;//block
    UIScrollView *myScroll;
    NSTimer *timer;//计时器
    NSInteger scrollIndex;//下表值
    NSDictionary *imgChaceDic; //图片缓存
}
+(UIView *)ShowLocationImageScrollWithFream:(CGRect)rect andImageArray:(NSArray *)array andBtnClick:(BtnClickBlock)btnClick
{
    WTImageScroll *selfImageScroll=[[WTImageScroll alloc]initWithFrame:rect];
    [selfImageScroll ShowImageScrollWithImageArray:array andBtnClick:btnClick andShowImageStyle:ImageShowStyleLocation];
    return selfImageScroll;
}
+(UIView *)ShowNetWorkImageScrollWithFream:(CGRect)rect andImageArray:(NSArray *)array andBtnClick:(BtnClickBlock)btnClick
{
    WTImageScroll *selfImageScroll=[[WTImageScroll alloc]initWithFrame:rect];
    [selfImageScroll ShowImageScrollWithImageArray:array andBtnClick:btnClick andShowImageStyle:ImageShowStyleNetwork];
    return selfImageScroll;
}
+(void)clearNetImageChace
{
   [[WTImageScroll alloc] clearNetImageChace];
}
//控制显示
-(void)ShowImageScrollWithImageArray:(NSArray *)array andBtnClick:(BtnClickBlock)btnClick andShowImageStyle:(ImageShowStyle)showStyle
{
    
    imgArray=array;
    btnClicks=btnClick;
    
    myScroll=[[UIScrollView alloc]initWithFrame:CGRectMake(0, 0,self.bounds.size.width, self.bounds.size.height)];
    myScroll.delegate=self;
    myScroll.pagingEnabled=YES;
    myScroll.contentSize=CGSizeMake(self.bounds.size.width*(array.count+2), 200);
    myScroll.contentOffset=CGPointMake(self.bounds.size.width, 0);
    myScroll.showsHorizontalScrollIndicator=NO;
    [self addSubview:myScroll];
    
    scrollIndex=1;
    
    for(NSInteger i = 0 ; i <array.count+1 ; i++){
        
        UIButton *btn=[UIButton buttonWithType:UIButtonTypeCustom];
        btn.frame=CGRectMake(self.bounds.size.width*(i+1), 0, self.bounds.size.width, self.bounds.size.height);
        btn.tag=100+i;
        if(showStyle==ImageShowStyleLocation){
            [btn setImage:[UIImage imageNamed:array[i>(array.count-1)?0:i]] forState:UIControlStateNormal];
        }else{
            [self networkImageSettingWithString:array[i>(array.count-1)?0:i] AndShowImageView:btn];
        }
        [btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
        [myScroll addSubview:btn];
        
    }
    
    UIButton *regitBtn=[UIButton buttonWithType:UIButtonTypeCustom];
    regitBtn.frame=CGRectMake(self.bounds.size.width*(array.count+1), 0, self.bounds.size.width, self.bounds.size.height);
    [myScroll addSubview:regitBtn];
    
    UIButton *leftBtn=[UIButton buttonWithType:UIButtonTypeCustom];
    leftBtn.frame=CGRectMake(0, 0, self.bounds.size.width, self.bounds.size.height);
    [myScroll addSubview:leftBtn];
    
    if(showStyle==ImageShowStyleNetwork){
        [self networkImageSettingWithString:[array firstObject] AndShowImageView:regitBtn];
        [self networkImageSettingWithString:[array lastObject] AndShowImageView:leftBtn];
    }else{
        [regitBtn setImage:[UIImage imageNamed:[array firstObject]] forState:UIControlStateNormal];
        [leftBtn setImage:[UIImage imageNamed:[array lastObject]] forState:UIControlStateNormal];
    }
    
    pageView=[[UIPageControl alloc]initWithFrame:CGRectMake(0, self.bounds.size.height-20, self.bounds.size.width, 20)];
    pageView.numberOfPages=array.count;
    pageView.currentPage=0;
    pageView.userInteractionEnabled=NO;
    pageView.currentPageIndicatorTintColor=[UIColor greenColor];
    pageView.pageIndicatorTintColor=[UIColor grayColor];
    [self addSubview:pageView];
    
    [self startTime];
}
#pragma mark   ScrollView delegate
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView;
{
    NSInteger index=scrollView.contentOffset.x/320;
    
    if(index==(imgArray.count+1)){
        
        scrollView.contentOffset=CGPointMake(self.bounds.size.width, 0);
        pageView.currentPage=0;
        scrollIndex=1;
        
    }else if(index==0){
        
        scrollView.contentOffset=CGPointMake(imgArray.count*self.bounds.size.width, 0);
        pageView.currentPage=imgArray.count-1;
        scrollIndex=imgArray.count;
        
    }else{
        
        pageView.currentPage=index-1;
        scrollIndex=index;
        
    }
    
    [self startTime];
}
-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
    //关闭计时器
    if(timer!=nil){
        [timer invalidate];
        timer=nil;
    }
}
#pragma mark 按钮点击
-(void)btnClick:(UIButton *)aBtn
{
    if(btnClicks){
        btnClicks(aBtn.tag-100);
    }
}
#pragma mark 添加滚动
-(void)scrollForTime:(NSTimer *)time
{
    scrollIndex=scrollIndex+1;
    
    if(scrollIndex==imgArray.count+1){
        
        [myScroll setContentOffset:CGPointMake(self.bounds.size.width*scrollIndex, 0) animated:YES];
        scrollIndex=1;
        
        [self performSelector:@selector(scrollToInit) withObject:nil afterDelay:0.5];
    }else{
        
        [myScroll setContentOffset:CGPointMake(self.bounds.size.width*scrollIndex, 0) animated:YES];
        
    }
    
    pageView.currentPage=scrollIndex-1;
}
//开启定时器
-(void)startTime
{
    if(timer==nil){
        timer=[NSTimer scheduledTimerWithTimeInterval:3 target:self selector:@selector(scrollForTime:) userInfo:nil repeats:YES];
    }
}
//回到原点
-(void)scrollToInit
{
    [myScroll setContentOffset:CGPointMake(self.bounds.size.width*scrollIndex, 0) animated:NO];
}
#pragma  mark 网络图片处理
-(void)networkImageSettingWithString:(NSString *)str AndShowImageView:(UIButton *)aBtn
{
    /*
     *缓存图片原理, 三级缓存
     */
    NSString *md5Str=[str md5];
    
    NSData *imgData=[imgChaceDic objectForKey:md5Str];
    if(imgData){
        
        UIImage *img=[[UIImage alloc]initWithData:imgData];
        
        [aBtn setImage:img forState:UIControlStateNormal];
    }
    
    NSString *paths = [NSHomeDirectory() stringByAppendingPathComponent:@"Library/Caches/Image"];
    
    [self imgFileDataLocationSettingWithPath:paths];
    
    NSString *path=[NSString stringWithFormat:@"%@/%@",paths,md5Str];
    
    if([[NSFileManager defaultManager] fileExistsAtPath:path]){
        
        UIImage *img=[[UIImage alloc]initWithContentsOfFile:path];
        
        [aBtn setImage:img forState:UIControlStateNormal];
        
        [imgChaceDic setValue:UIImagePNGRepresentation(img) forKey:@"md5Str"];
    }else{
        
        dispatch_async(dispatch_get_global_queue(0, 0), ^{
           
            NSData *data=[[NSData alloc]initWithContentsOfURL:[NSURL URLWithString:str]];
            
            UIImage *img=[[UIImage alloc]initWithData:data];
            
            dispatch_async(dispatch_get_main_queue(), ^{
                
                [aBtn setImage:img forState:UIControlStateNormal];
                
                [imgChaceDic setValue:UIImagePNGRepresentation(img) forKey:@"md5Str"];
                
                NSData *imgData=UIImagePNGRepresentation(img);
                
                [imgData writeToFile:path atomically:YES];
            });
        });
    }
}
//处理缓存路径
-(void)imgFileDataLocationSettingWithPath:(NSString *)path
{
    NSFileManager *fileManager=[NSFileManager defaultManager];
    
    if(![fileManager fileExistsAtPath:path]){
        
        [fileManager createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];
        
    }
    
}
//清理沙盒中的图片缓存
-(void)clearNetImageChace
{
    NSString *paths = [NSHomeDirectory() stringByAppendingPathComponent:@"Library/Caches/Image"];
    
    NSFileManager *fileManager=[NSFileManager defaultManager];
    
    if([fileManager fileExistsAtPath:paths]){
        [fileManager removeItemAtPath:paths error:nil];
    }
    
    [fileManager createDirectoryAtPath:paths withIntermediateDirectories:YES attributes:nil error:nil];
}
@end

//点击相应方法

func didSelectedImageIndex(_ index: Int) {
        
        print("index:\(index)")
        
        let detailVC = BannerDetailVC()
        
        let model = imageArr[index] as! HeadImageModel
        
        //        print("model:\(model.id)")
        
        detailVC.titleText = model.title
        
        detailVC.context = model.context
        
        self.navigationController?.pushViewController(detailVC, animated: true)
    }

//web页面显示  ///此处为swift3.0书写的

import UIKit
class BannerDetailVC: UIViewController {
    var titleText : String? = ""
    
    var context : String? = ""
    
    var url : String? = ""
    
    override func viewDidLoad() {
        
        super.viewDidLoad()
        
        self.view.backgroundColor = RGBA(r: 246, g: 246, b: 250, a: 1.0)
        
        let webView = UIWebView(frame: CGRect.init(x: 0, y: 0, width: SCREEN_WIDTH, height: SCREEN_HEIGHT))
        
        webView.backgroundColor=UIColor.white
        
        self.view.addSubview(webView)
        
        let path = Bundle.main.bundlePath
        
        let url = NSURL(fileURLWithPath: path)
        
        webView.loadHTMLString(context!, baseURL: url as URL)
        
        self.title = titleText
        
    }
}

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