有时候后台会返回多行文字，其中文字中某写大小，颜色需要特殊订制就会比较麻烦，会用HTML 字符串返回给前台。
假如后台返回的是responseData[@"activityMsg"] 这个，长这样
activityMsg = "<head>
<meta charset="UTF-8">
</head>
<div style="padding: 0px 0px;">
<p align="left" style="color: #990035;font-size: 13px; padding:0;margin:0">1.本次交易仅支持 信用卡,光大银行手机信用卡</p>
<p align="left" style="color: #990035;font-size: 13px; padding:0;margin:0">2.光大联名信用卡最高满5000元减300元</p>
<p align="left" style="color: #990035;font-size: 13px; padding:0;margin:0">3.使用银行卡满减权益的订单不支持退款</p>
</div>"
1，通过 UILabel 加载富文本的方法加载 HTML 字符串
NSString* str1 = [self htmlEntityDecode:responseData[@"content"]];
//2.将HTML字符串转换为attributeString
NSAttributedString * attributeStr = [self attributedStringWithHTMLString:str1];
//3.使用label加载html字符串
_contentLab.attributedText = attributeStr;
_contentLab.text //这个取到的值可以当成字符串往后面的页面去传
CGSize titleSize = [_contentLab.attributedText boundingRectWithSize:CGSizeMake(kScreenWidth-60, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading context:nil].size;
_contentLab.frame=CGRectMake(30, 115, kScreenWidth-60, ceilf(titleSize.height));
//将 < 等类似的字符转化为HTML中的“<”等
- (NSString *)htmlEntityDecode:(NSString *)string
{
string = [string stringByReplacingOccurrencesOfString:@""" withString:@"\""];
string = [string stringByReplacingOccurrencesOfString:@"'" withString:@"'"];
string = [string stringByReplacingOccurrencesOfString:@"<" withString:@"<"];
string = [string stringByReplacingOccurrencesOfString:@">" withString:@">"];
string = [string stringByReplacingOccurrencesOfString:@"&" withString:@"&"]; // Do this last so that, e.g. @"&lt;" goes to @"<" not @"<"
return string;
}
//将HTML字符串转化为NSAttributedString富文本字符串
- (NSAttributedString *)attributedStringWithHTMLString:(NSString *)htmlString
{
NSDictionary *options = @{ NSDocumentTypeDocumentAttribute : NSHTMLTextDocumentType,
NSCharacterEncodingDocumentAttribute :@(NSUTF8StringEncoding) };
NSData *data = [htmlString dataUsingEncoding:NSUTF8StringEncoding];
return [[NSAttributedString alloc] initWithData:data options:options documentAttributes:nil error:nil];
}
//去掉 HTML 字符串中的标签
- (NSString *)filterHTML:(NSString *)html
{
NSScanner * scanner = [NSScanner scannerWithString:html];
NSString * text = nil;
while([scanner isAtEnd]==NO)
{
//找到标签的起始位置
[scanner scanUpToString:@"<" intoString:nil];
//找到标签的结束位置
[scanner scanUpToString:@">" intoString:&text];
//替换字符
html = [html stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@"%@>",text] withString:@""];
}
// NSString * regEx = @"<([^>]*)>";
// html = [html stringByReplacingOccurrencesOfString:regEx withString:@""];
return html;
}
UIWebView * webView = [[UIWebView alloc]initWithFrame:CGRectMake(20, 300, self.view.frame.size.width - 40, 400)];
[webView loadHTMLString:str1 baseURL:nil];
[self.view addSubview:webView];
self.webView = webView;
换成wkwebview也行 也是具有这个方法
loadHTMLString:str1 baseURL:
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