给 富文本添加 头信息, 然后用webView展示

在实际开发中, 我们经常会用到 UIWebView, 但是有时候 富文本里面有图片时就会有问题,(图片的宽度往往会超过屏幕宽),这个时候就需要我们手动添加CSS样式, 拼接HTML格式.

| OC 版

- (void)dealNewsData:(NSDictionary *)dataDic{
    // 取出所有的内容
    NSDictionary * allData = dataDic[@"BJ5NRE5T00031H2L"];
    // 取出body中的内容
    NSString * bodyData = allData[@"body"];
    // 取出标题
    NSString * title = allData[@"title"];
    // 取出发布时间
    NSString * ptime = allData[@"ptime"];
    // 取出来源
    NSString * source = allData[@"source"];
    // 取出图片资源
    NSArray * imgArr = allData[@"img"];
    // 遍历
    for (int i = 0; i < imgArr.count; i ++) {
        NSDictionary * imgItem = imgArr[i];
        // 取出占位符
        NSString * ref = imgItem[@"ref"];
        // 取出图片标题
        NSString * imgTitle = imgItem[@"alt"];
        // 取出src
        NSString * src = imgItem[@"src"];
        //        NSString * imgHTML = @"
 
 ";
        NSString * imgHtml = [NSString stringWithFormat:@"
%@
",src,imgTitle];
        bodyData = [bodyData stringByReplacingOccurrencesOfString:ref withString:imgHtml];
    }
    
    // 创建标题的HTML标签
    NSString * titleHTML = [NSString stringWithFormat:@"
%@
",title];
    // 创建子标签的HTML标签
    NSString * subTitleHtml = [NSString stringWithFormat:@"
%@%@
",ptime,source];
    
    // 加载css的url 路径
    
    NSURL * css = [[NSBundle mainBundle] URLForResource:@"newsDetail" withExtension:@"css"];
    
    
    // 创建html 标签
    
    NSString * cssHtml = [NSString stringWithFormat:@"",css];
    
    // 加载js的URL 路径
    
    NSURL * js = [[NSBundle mainBundle] URLForResource:@"test" withExtension:@"js"];
    // 创建html标签
    
    NSString * jsHtml = [NSString stringWithFormat:@"",js];
    
    
    NSString * html = [NSString stringWithFormat:@"%@%@%@%@%@",cssHtml,titleHTML,subTitleHtml,bodyData,jsHtml];
    //NSLog(@"html -%@",html);
    [self.webView loadHTMLString:html baseURL:nil];
    
}

| Swift版

let ImageCss = NSBundle.mainBundle().URLForResource("newsDetail", withExtension: "css")
let cssHtml = ""
let html = "\(cssHtml)\(dataInfo["content"] as! String)"
self.web.loadHTMLString(html, baseURL: nil)

注意: id 用 # class 用 .

| css 样式表

body{
    background-color:red;
}

img{
    width:100%;
}

#mainTitle{
    text-align:center;
    font-size:20px;
    margin-top:25px;
    margin-bottom:10px;
}

#subTitle{
    color:gray;
    text-align:left;
}

.time{
    margin-right:10px;
    margin-bottom:10px;
}

.all-img{
    color;gray;
    text-align:center;
    margin:8px 0;
}

通过上面的方法,就能解决图片太宽问题