UIWebView的HTML5扩展

////  UIWebView+HTML5.h//  WebViewJS////  Created by 杜子兮(duzixi) on 14-6-30.//  Edited  by 杜子兮(duzixi) on 14-7-11. 修改网页图片显示大小//                                       添加(jQuery)//  Copyright (c) 2014年 lanou3g.com 蓝鸥. All rights reserved.//#import <UIKit/UIKit.h>@interface UIWebView (JavaScript)#PRagma mark -#pragma mark 获取网页中的数据///  获取某个标签的结点个数- (int)nodeCountOfTag:(NSString *)tag;///  获取当前页面URL- (NSString *) getCurrentURL;///  获取标题- (NSString *) getTitle;///  获取图片- (NSArray *) getImgs;///  获取当前页面所有链接- (NSArray *) getOnClicks;#pragma mark -#pragma mark 改变网页样式和行为///  改变背景颜色- (void) setBackgroundColor:(UIColor *)color;///  为所有图片添加点击事件(网页中有些图片添加无效)- (void) addClickEventOnImg;///  改变所有图像的宽度- (void) setImgWidth:(int)size;///  改变所有图像的高度- (void) setImgHeight:(int)size;///  改变指定标签的字体颜色- (void) setFontColor:(UIColor *) color withTag:(NSString *)tagName;///  改变指定标签的字体大小- (void) setFontSize:(int) size withTag:(NSString *)tagName;@end

////  UIWebView+HTML5.m////  Created by 杜子兮(duzixi) on 14-6-30.//  Edited  by 杜子兮(duzixi) on 14-7-11. 修改网页图片显示大小//                                       添加(jQuery)//  Copyright (c) 2014年 lanou3g.com 蓝鸥. All rights reserved.//#import "UIWebView+HTML5.h"#import "UIColor+Change.h"@implementation UIWebView (JavaScript)#pragma mark -#pragma mark 获取网页中的数据///  获取某个标签的结点个数- (int)nodeCountOfTag:(NSString *)tag{    NSString *jsString = [NSString stringWithFormat:@"document.getElementsByTagName('%@').length", tag];    int len = [[self stringByEvaluatingJavaScriptFromString:jsString] intValue];    return len;}///  获取当前页面URL- (NSString *)getCurrentURL{    return [self stringByEvaluatingJavaScriptFromString:@"document.location.href"];}///  获取标题- (NSString *)getTitle{    return [self stringByEvaluatingJavaScriptFromString:@"document.title"];}///  获取所有图片链接- (NSArray *)getImgs{    NSMutableArray *arrImgURL = [[NSMutableArray alloc] init];        for (int i = 0; i < [self nodeCountOfTag:@"img"]; i++) {        NSString *jsString = [NSString stringWithFormat:@"document.getElementsByTagName('img')[%d].src", i];        [arrImgURL addObject:[self stringByEvaluatingJavaScriptFromString:jsString]];    }    return arrImgURL;}///  获取当前页面所有点击链接- (NSArray *)getOnClicks{    NSMutableArray *arrOnClicks = [[NSMutableArray alloc] init];        for (int i = 0; i < [self nodeCountOfTag:@"a"]; i++) {        NSString *jsString = [NSString stringWithFormat:@"document.getElementsByTagName('a')[%d].getAttribute('onclick')", i];        NSString *clickString = [self stringByEvaluatingJavaScriptFromString:jsString];        NSLog(@"%@", clickString);        [arrOnClicks addObject:clickString];    }    return arrOnClicks;}#pragma mark -#pragma mark 改变网页样式和行为///  改变背景颜色- (void)setBackgroundColor:(UIColor *)color{    NSString * jsString = [NSString stringWithFormat:@"document.body.style.backgroundColor = '%@'",[color webColorString]];    [self stringByEvaluatingJavaScriptFromString:jsString];}///  为所有图片添加点击事件(网页中有些图片添加无效,需要协议方法配合截取)- (void)addClickEventOnImg{    for (int i = 0; i < [self nodeCountOfTag:@"img"]; i++) {        //利用重定向获取img.src，为区分，给url添加'img:'前缀        NSString *jsString = [NSString stringWithFormat:            @"document.getElementsByTagName('img')[%d].onclick = /              function() { document.location.href = 'img' + this.src; }",i];        [self stringByEvaluatingJavaScriptFromString:jsString];    }}///  改变所有图像的宽度- (void) setImgWidth:(int)size{    for (int i = 0; i < [self nodeCountOfTag:@"img"]; i++) {        NSString *jsString = [NSString stringWithFormat:@"document.getElementsByTagName('img')[%d].width = '%d'", i, size];        [self stringByEvaluatingJavaScriptFromString:jsString];    }}///  改变所有图像的高度- (void) setImgHeight:(int)size{    for (int i = 0; i < [self nodeCountOfTag:@"img"]; i++) {        NSString *jsString = [NSString stringWithFormat:@"document.getElementsByTagName('img')[%d].height = '%d'", i, size];        [self stringByEvaluatingJavaScriptFromString:jsString];    }}///  改变指定标签的字体颜色- (void)setFontColor:(UIColor *)color withTag:(NSString *)tagName{    NSString *jsString = [NSString stringWithFormat:        @"var nodes = document.getElementsByTagName('%@'); /          for(var i=0;i<nodes.length;i++){/              nodes[i].style.color = '%@';}", tagName, [color webColorString]];    [self stringByEvaluatingJavaScriptFromString:jsString];}///  改变指定标签的字体大小- (void)setFontSize:(int)size withTag:(NSString *)tagName{    NSString *jsString = [NSString stringWithFormat:        @"var nodes = document.getElementsByTagName('%@'); /          for(var i=0;i<nodes.length;i++){/              nodes[i].style.fontSize = '%dpx';}", tagName, size];    [self stringByEvaluatingJavaScriptFromString:jsString];}@end