首页 > 代码库 > 获取网页上数据（图片、文字、视频）－b
获取网页上数据（图片、文字、视频）－b
Demo地址：http://download.csdn.net/detail/u012881779/8831835
获取网页上所有图片、获取所有html、获取网页title、获取网页内容文字。。。
.h 文件 代码:
//网页 //NSString *strPath = [NSString stringWithFormat:@"http://www.baidu.com/s?wd=%@&cl=3",theWord]; //视频 //NSString *strPath = [NSString stringWithFormat:@"http://www.itinge.com/music/16241.mp4"]; //图片 NSString *strPath = [NSString stringWithFormat:@"http://image.baidu.com/search/index?tn=baiduimage&istype=2&ie=utf-8&word=%@",theWord]; strPath = [strPath stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];.m 文件 代码:
@interface ViewController ()<UISearchBarDelegate , UIWebViewDelegate,UIGestureRecognizerDelegate> @property (weak, nonatomic) IBOutlet UISearchBar *searchBar; @property (weak, nonatomic) IBOutlet UIWebView *webview; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; _searchBar.delegate = self; _webview.delegate = self; [self addTapOnWebView]; } -(void)addTapOnWebView{ UITapGestureRecognizer* singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTap:)]; [_webview addGestureRecognizer:singleTap]; singleTap.delegate = self; singleTap.cancelsTouchesInView = NO; } #pragma mark- TapGestureRecognizer - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{ return YES; } //被点击位置对应链接 -(void)handleSingleTap:(UITapGestureRecognizer *)sender{ CGPoint pt = [sender locationInView:_webview]; NSString *imgURL = [NSString stringWithFormat:@"document.elementFromPoint(%f, %f).src", pt.x, pt.y]; NSString *urlToSave = [_webview stringByEvaluatingJavaScriptFromString:imgURL]; NSLog(@"image url=%@", urlToSave); NSString * JsToGetHTMLSource = @"top.location.href"; NSString * pageSource = [_webview stringByEvaluatingJavaScriptFromString:JsToGetHTMLSource]; NSLog(@"\n\n__url=%@", pageSource); if (urlToSave.length > 4) { NSString *substr = [urlToSave substringFromIndex:urlToSave.length-3]; if([substr isEqualToString:@"jpg"] || [substr isEqualToString:@"png"]){ [self showImageURL:urlToSave point:pt]; } } } //呈现图片，HTML是否适配分辨率将影响点击资源与获取到得资源是否一致 -(void)showImageURL:(NSString *)url point:(CGPoint)point { UIImageView *showView = [[UIImageView alloc] initWithFrame:[[UIScreen mainScreen]bounds]]; showView.center = point; CGPoint newPoint = self.view.center; showView.center = newPoint; showView.backgroundColor = [UIColor blackColor]; showView.alpha = 1; showView.userInteractionEnabled = YES; [self.view addSubview:showView]; [showView setContentMode:UIViewContentModeScaleAspectFit]; [showView showImageFromURL:url placeHolder:nil CompletionBlock:nil]; UITapGestureRecognizer* singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleViewTap:)]; [showView addGestureRecognizer:singleTap]; [self.navigationController setNavigationBarHidden:YES animated:YES]; } //移除图片查看视图 -(void)handleSingleViewTap:(UITapGestureRecognizer *)sender { for (id obj in self.view.subviews) { if ([obj isKindOfClass:[UIImageView class]]) { [obj removeFromSuperview]; } } [self.navigationController setNavigationBarHidden:YES animated:YES]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } /* *JavaScript获取网页信息总结 获取所有html:NSString *lJs = @"document.documentElement.innerHTML"; 获取网页title:NSString *lJs2 = @"document.title"; UIWebView *lWebView = [self getCurrentWebView]; NSString *lHtml1 = [lWebView stringByEvaluatingJavaScriptFromString:lJs]; NSString *lHtml2 = [lWebView stringByEvaluatingJavaScriptFromString:lJs2]; JavaScript获取网页信息总结 JavaScript获取当前页面URL、title等 thisURL = document.URL; thisHREF = http://www.mamicode.com/document.location.href; "\n\n 视频名称 : %@",getVideoTitle); double getVideoDuration = [_webview getVideoDuration]; NSLog(@"\n\n 视频总时间 : %f",getVideoDuration); double getVideoCurrentTime = [_webview getVideoCurrentTime]; NSLog(@"\n\n 视频当前时间 : %f",getVideoCurrentTime); */ /*2网页*/ /* //获取网页中所有图片 NSString *imageUrls = [_webview stringByEvaluatingJavaScriptFromString:@"var str=new Array();""$(‘img‘).each(function(){str.push($(this).attr(‘src‘));});" "str.join(‘,‘);"]; NSLog(@"\n\n 所有图片 : %@",imageUrls); //获取所有html NSString *lJs = @"document.documentElement.innerHTML"; NSString *lHtml1 = [_webview stringByEvaluatingJavaScriptFromString:lJs]; //NSLog(@"1.%@",lHtml1); //获取网页title: NSString *lJs2 = @"document.title"; NSString *lHtml2 = [_webview stringByEvaluatingJavaScriptFromString:lJs2]; NSLog(@"2.%@",lHtml2); //thisURL = document.URL NSString *lJs3 = @"document.URL"; NSString *lHtml3 = [_webview stringByEvaluatingJavaScriptFromString:lJs3]; NSLog(@"3.%@",lHtml3); //获取网页内容文字 NSString *lJs4 = @"document.documentElement.innerText"; NSString *lHtml4 = [_webview stringByEvaluatingJavaScriptFromString:lJs4]; NSLog(@"4.%@",lHtml4); //获取网页内容文字 NSString *lJs5 = @"document.body.innerText"; NSString *lHtml5 = [_webview stringByEvaluatingJavaScriptFromString:lJs5]; NSLog(@"5.%@",lHtml5); */ /*3图片*/ /**/ //获取所有html NSString *innerHTML = @"document.documentElement.innerHTML"; NSString *innerHTMLString = [_webview stringByEvaluatingJavaScriptFromString:innerHTML]; //检索图片 if(![innerHTMLString isEqualToString:@"<head></head><body></body>"]){ [self searchPictureFromHTML:innerHTMLString]; }else{ UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:@"请先搜索关键字" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil nil]; [alert show]; } } //检索图片 -(void)searchPictureFromHTML:(NSString *)theHTML{ //"http://img0.bdstatic.com/img/image/shouye/qwscmeb02.jpg” NSMutableArray *picMutableArr = [[NSMutableArray alloc] init]; NSMutableArray *picHttpArr = [[theHTML componentsSeparatedByString:@"http://"] mutableCopy]; for (int i = 0; i < picHttpArr.count ; i ++) { NSString *tempStr = [picHttpArr objectAtIndex:i]; NSArray *tempArr = [tempStr componentsSeparatedByString:@".jpg"]; NSString *firstStr = [tempArr firstObject]; //判断字符串是否为图片 if([self judgeStringIsPicture:firstStr]){ if([self judgeStringIsNull:firstStr]){ NSString *picUrl = [NSString stringWithFormat:@"http://%@.jpg",firstStr]; [picMutableArr addObject:picUrl]; } }else{ } } //清除重复图片 picMutableArr = [self cleanRepeatPicture:picMutableArr]; //展示获取图片 PictureViewController *picVc = [[PictureViewController alloc] initWithNibName:@"PictureViewController" bundle:nil]; picVc.valueArr = picMutableArr; [self.navigationController pushViewController:picVc animated:YES]; } //判断字符串是否为图片链接 -(BOOL)judgeStringIsPicture:(NSString *)string{ BOOL result = YES; NSMutableArray *mutable = [[NSMutableArray alloc] initWithObjects:@"<",@">",@"{",@"}",@"[",@"]",@"(",@")",@"|",@"||",@"$",@"?",@";", nil nil]; if(string != nil && string.length > 0){ for (int i = 0; i < string.length; i ++) { NSString *subStr = [string substringWithRange:NSMakeRange(i, 1)]; for (int j = 0; j < mutable.count ; j ++) { NSString *markStr = [mutable objectAtIndex:j]; if([subStr isEqualToString:markStr]){ result = NO; } } } } return result; } //清除重复图片 -(NSMutableArray *)cleanRepeatPicture:(NSMutableArray *)picarr{ NSMutableArray *tempArr = [[NSMutableArray alloc] init]; for (int i = picarr.count-1 ; i >= 0 ; i --) { NSString *tempStr = [picarr objectAtIndex:i]; NSArray *oneArr = [tempStr componentsSeparatedByString:@"&fm"]; if(tempArr.count == 0){ [tempArr insertObject:tempStr atIndex:0]; }else{ BOOL result = YES; for (int j = 0 ; j < tempArr.count ; j ++) { NSString *jstr = [tempArr objectAtIndex:j]; if([jstr isEqualToString:tempStr]){ result = NO; }else{ if(oneArr.count > 1){ NSArray *twoArr = [jstr componentsSeparatedByString:@"&fm"]; if([[oneArr firstObject] isEqualToString:[twoArr firstObject]]){ result = NO; } } } } if(result){ [tempArr insertObject:tempStr atIndex:0]; } } } return tempArr; } //HTML -(void)detailsWithUrl:(NSString *)urlStr{ NSURL *url =[NSURL URLWithString:urlStr]; NSURLRequest *request =[NSURLRequest requestWithURL:url]; [_webview loadRequest:request]; [_webview setScalesPageToFit:YES]; //隐藏滚动条 _webview.backgroundColor=[UIColor clearColor]; _webview.opaque = NO; for (UIView *aView in [_webview subviews]){ [aView setBackgroundColor:[UIColor clearColor]]; if ([aView isKindOfClass:[UIScrollView class]]){ UIScrollView *tempSV = (UIScrollView *)aView; tempSV.tag = 1321; [tempSV setShowsHorizontalScrollIndicator:NO]; //右侧的滚动条 （水平的类似） [tempSV setShowsVerticalScrollIndicator:NO]; [tempSV setBounces:NO]; [tempSV setContentSize:CGSizeMake(1,tempSV.contentSize.height )]; for (UIView *shadowView in tempSV.subviews){ if ([shadowView isKindOfClass:[UIImageView class]]){ shadowView.hidden = YES; //上下滚动出边界时的黑色的图片 也就是拖拽后的上下阴影 } } } } } //判断字符串不全为空 -(BOOL)judgeStringIsNull:(NSString *)string{ BOOL result = NO; if(string != nil && string.length > 0){ for (int i = 0; i < string.length; i ++) { NSString *subStr = [string substringWithRange:NSMakeRange(i, 1)]; if(![subStr isEqualToString:@" "] && ![subStr isEqualToString:@""]){ result = YES; } } } return result; } #pragma mark UISearchBarDelegate - (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar{ if([self judgeStringIsNull:searchBar.text]){ //搜索接口 NSString *urlStr = [NetPortShared baiduSearchDelegate:self andTag:33333 andWord:_searchBar.text]; [self detailsWithUrl:urlStr]; }else{ UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:@"请输入关键字" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil nil]; [alert show]; } } @end
示意图：
文/作者:枫志应明
c博客地址:http://blog.csdn.net/wsyx768/article/details/46618125
获取网页上数据（图片、文字、视频）－b
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