在我们对一些界面的详情页面进行编程时(类似如新闻app,团购app等),有时候详情页面在使用一段时间后,需要不同排版效果,如果重新布置view页面布局,可能会浪费很多时间,产生一些麻烦。由于Html已经可以在iOS上嵌入,因此我们可以使用Html模版来,嵌套进UIwebview中进行使用,如果需要新的页面布局,只需要简单的更换Html模版,方便省事。
由于自己完全没有接触过Html编程,基本上对Html模版上的内容一窍不通,其实使用Html模版只需要了解其对应的标签,完成替换就可以了。我使用的Html模版包括三个文件:html文件(用来书写页面的内容),css文件(用来为页面布局设定),js文件(页面触发事件都在这里处理)。这三个页面我感觉类似ios的mvc开发模式。我们需要替换的标签内容主要在html文件中(代码一)。
代码一<html> <head> <meta name="viewport" content="target-densitydpi=device-dpi,width=320,user-scalable=no"/> <link href=‘content.css‘ rel=‘stylesheet‘/> <script src="content.js"></script> </head> <body> <div id="title_section" class="font_small"> <div id=‘title‘>{{title}}</div> <div id=‘subtitle‘>{{source}} <span aria-hidden="true">{{ptime}}</span></div> </div> <div id="body_section" lang="zh"> <p><div class=‘PRE‘>{{digest}}</div></p> {{body}} <p align="right">(责任编辑:{{ec}})</p> <p align="center"><a href="source:///{{source_url}}" class="border_link">查看原文<span></span></a></p> </div> </body> </html>
通过发送网络请求,将返回的json数据进行解析后得到一个nsdictionary,通过在model模型中进行赋值(如代码二,三),再将html中对应的标签进行简单的替换(代码四):将返回的nsstring,加载到webview上loadHTMLString,再添加html的模版路径(代码五),就可以实现了。
代码二@interface WebInfo : NSObject @property(nonatomic, strong) NSString *title; @property(nonatomic, strong) NSString *source; @property(nonatomic, strong) NSString *ptime; @property(nonatomic, strong) NSString *digest; @property(nonatomic, strong) NSString *body; @property(nonatomic, strong) NSString *ec; @property(nonatomic, strong) NSString *sourceurl; @property(nonatomic, strong) NSArray *images; + (instancetype)infoFromDict:(NSDictionary *)dict;
代码三
+ (instancetype)infoFromDict:(NSDictionary *)dict { WebInfo *info = [[WebInfo alloc] init]; info.title = [dict objectForKey:@"title"]; info.source = [dict objectForKey:@"source"]; info.ptime = [dict objectForKey:@"ptime"]; info.digest = [dict objectForKey:@"digest"]; info.body = [dict objectForKey:@"body"]; info.ec = [dict objectForKey:@"ec"]; info.sourceurl = [dict objectForKey:@"source_url"]; NSArray *images =[dict objectForKey:@"img"]; info.images = [ImageInfo arrayFromArray:images]; return info; }
代码四// HTML标记 #define HtmlBody @"{{body}}" #define HtmlTitle @"{{title}}" #define HtmlSource @"{{source}}" #define HtmlPTime @"{{ptime}}" #define HtmlDigest @"{{digest}}" #define HtmlSourceURL @"{{source_url}}" #define HtmlImage @"<p><img src=‘%@‘ style=‘margin:auto 0; width:100%%;‘ />" -(NSString *)htmlConvert:(WebInfo *)Info { NSString *file = [[NSBundle mainBundle]pathForResource:@"content_template2" ofType:@"html"]; NSString *html = [[NSString alloc]initWithContentsOfFile:file encoding:NSUTF8StringEncoding error:nil]; html = [html stringByReplacingOccurrencesOfString:HtmlBody withString:Info.body]; html = [html stringByReplacingOccurrencesOfString:HtmlTitle withString:Info.title]; html = [html stringByReplacingOccurrencesOfString:HtmlPTime withString:Info.ptime]; html = [html stringByReplacingOccurrencesOfString:HtmlDigest withString:Info.digest]; html = [html stringByReplacingOccurrencesOfString:HtmlSource withString:Info.source]; return html; }
代码五NSString *URLPath = [[NSBundle mainBundle]pathForResource:@"content_template" ofType:@"html"]; NSString *htmlString = [self htmlConvert:Info]; UIWebView * web = [[UIWebView alloc]initWithFrame:self.view.frame]; web.delegate = self; [self.view addSubview:web]; [web loadHTMLString:htmlString baseURL:[NSURL URLWithString:URLPath]];
时间: 2024-10-07 12:01:57