1.向后台服务器请求数据
-(void)viewDidLoad
{
[super viewDidLoad];
self.title = self.headline.title;
self.automaticallyAdjustsScrollViewInsets = NO;
// [self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:self.headline.url_3w]]];
NSString *url = [NSString stringWithFormat:@"http://c.m.163.com/nc/article/%@/full.html",self.headline.docid];
[[LTHttpManager manager] GET:url parameters:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) {
// [responseObject writeToFile:@"/Users/xiufengfan/Desktop/detail.plist" atomically:YES];
// NSLog(@"%@",self.headline.docid);
LTNewsDetail *detail = [LTNewsDetail mj_objectWithKeyValues:responseObject[self.headline.docid]];
self.detail = detail;
[self showNewsDetail];
} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
}];
}
- 初始化html,并显示
-(void)showNewsDetail
{
/*
NSMutableString *html = [NSMutableString string];
// 头内容
[html appendString:@"<html>"];
[html appendString:@"<head>"];
[html appendFormat:@"<link rel=\"stylesheet\" href=\"%@\">",[[NSBundle mainBundle] URLForResource:@"LTNewsDetail.css" withExtension:nil]];
[html appendString:@"</head>"];
// 具体内容
[html appendString:@"<body>"];
// 将图片插入body对应的标记中,比如<!--IMG#0-->
[html appendString:[self setupBody]];
[html appendString:@"</body>"];
// 尾部内容
[html appendString:@"</html>"];
*/
NSMutableString *html = [NSMutableString stringWithContentsOfURL:[[NSBundle mainBundle] URLForResource:@"LTNewsDetail.tpl" withExtension:nil] encoding:NSUTF8StringEncoding error:nil];
NSString *link = [NSString stringWithFormat:@"%@",[[NSBundle mainBundle] URLForResource:@"LTNewsDetail.css" withExtension:nil]];
[html replaceOccurrencesOfString:@"<!--LINKHREF-->" withString:link options:NSCaseInsensitiveSearch range:NSMakeRange(0, html.length)];
// 将图片插入body对应的标记中,比如<!--IMG#0-->
[html replaceOccurrencesOfString:@"<!--BODY-->" withString:[self setupBody] options:NSCaseInsensitiveSearch range:NSMakeRange(0, html.length)];
// 显示网页
[self.webView loadHTMLString:html baseURL:nil];
}
3.初始化body,并返回body
-(NSString*)setupBody
{
/*
// 手动添加标签
NSMutableString *body = [NSMutableString string];
// 拼接标题
[body appendFormat:@"<div class = \"title\">%@</div>",self.detail.title];
// 拼接时间
[body appendFormat:@"<div class = \"time\">%@</div>",self.detail.ptime];
// 拼接内容
[body appendString:self.detail.body];
*/
// 利用模板添加标签
NSMutableString *body = [NSMutableString stringWithContentsOfURL:[[NSBundle mainBundle] URLForResource:@"LTNewsDetailBody.tpl" withExtension:nil] encoding:NSUTF8StringEncoding error:nil];
[body replaceOccurrencesOfString:@"<!--DIVTITLE-->" withString:self.detail.title options:NSCaseInsensitiveSearch range:NSMakeRange(0, body.length)];
[body replaceOccurrencesOfString:@"<!--DIVTIME-->" withString:self.detail.ptime options:NSCaseInsensitiveSearch range:NSMakeRange(0, body.length)];
[body appendString:self.detail.body];
// 拼接图片
for (LTNewsDetailImg *img in self.detail.img) {
// 图片html的字符串
NSMutableString *imgHtml = [NSMutableString stringWithContentsOfURL:[[NSBundle mainBundle]URLForResource:@"LTNewsDetailBodyImg.tpl" withExtension:nil] encoding:NSUTF8StringEncoding error:nil];
/*
// 手动添加标签
[imgHtml appendString:@"<div class = \"img-parent\">"];
NSString *onload = @"this.onclick = function(){ window.location.href = 'lt:src=' + this.src;}";
NSString *imgStr = [NSString stringWithFormat:@"<img onload =\"%@\" width = \"%d\" height = \"%d\" src=\"%@\">",onload,img.imgWidth,img.imgHeight,img.src];
[imgHtml appendString:@"</div>"];
*/
// 利用模板添加标签
[imgHtml replaceOccurrencesOfString:@"<!--IMGWIDTH-->" withString:[NSString stringWithFormat:@"%d",img.imgWidth] options:NSCaseInsensitiveSearch range:NSMakeRange(0, imgHtml.length)];
[imgHtml replaceOccurrencesOfString:@"<!--IMGHEIGHT-->" withString:[NSString stringWithFormat:@"%d",img.imgHeight] options:NSCaseInsensitiveSearch range:NSMakeRange(0, imgHtml.length)];
[imgHtml replaceOccurrencesOfString:@"<!--IMGSRC-->" withString:[NSString stringWithFormat:@"%@",img.src] options:NSCaseInsensitiveSearch range:NSMakeRange(0, imgHtml.length)];
// 为图片添加需要被拦截的href
NSString *href = @"'lt:(saveImageToAlbum:)&src=' + this.src";
self.href = href;
[imgHtml replaceOccurrencesOfString:@"<!--ONLOADHREF-->" withString:self.href options:NSCaseInsensitiveSearch range:NSMakeRange(0, imgHtml.length)];
// 将img.ref替换为img标签内容
[body replaceOccurrencesOfString:img.ref withString:imgHtml options:NSCaseInsensitiveSearch range:NSMakeRange(0, body.length)];
}
return body;
}
- 在h5界面要使用原生功能时,需要监听webView的代理,使用h5 脚本语言加载 href 时调用webView的开始加载请求时调用代理方法
webView:(UIWebView *)webView shouldStartLoadWithRequest:navigationType:,可以判断请求是否需要拦截.
// MARK: pragma mark - UIWebViewDelegate
-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
NSString *url = request.URL.absoluteString;
NSRange range = [url rangeOfString:@"lt:(saveImageToAlbum:)&src="];
if (range.location != NSNotFound) {
NSUInteger loc = range.location + range.length;
NSString *src = [url substringFromIndex:loc];
// 执行协议method(saveImageToAlbum:)
NSRange firstRange = [url rangeOfString:@"("];
NSRange lastRange = [url rangeOfString:@":)"];
NSRange methodRange = NSMakeRange(firstRange.location+firstRange.length, lastRange.location - firstRange.location);
NSString *methodStr = [url substringWithRange:methodRange];
[self performSelector:NSSelectorFromString(methodStr) withObject:src afterDelay:0];
return NO;
}
return YES;
}
