http://www.cnblogs.com/wupei/p/4019963.html
/**
* 对指定内定进行着色，keywords数组与colors数组相对应
*
* @param content 全部内容
* @param keyWords 关键字数组
* @param color 关键字对应颜色，如果传空，则默认对关键字着红色
* @param repeat 关键字出现多次的时候，是否全部进行多次着色,默认否
*
* @return
*/
+(NSAttributedString*)attributeStringWithContent:(NSString*)content keyWords:(NSArray*)keyWords colors:(NSArray*)colors repeat:(BOOL)repeat;
+(NSAttributedString*)attributeStringWithContent:(NSString*)content keyWords:(NSArray*)keyWords colors:(NSArray*)colors repeat:(BOOL)repeat
{
NSMutableAttributedString*attString = [[NSMutableAttributedStringalloc] initWithString:content];
if(keyWords) {
[keyWords enumerateObjectsUsingBlock:^(idobj,NSUIntegeridx,BOOL*stop) {
NSMutableString*tmpString=[NSMutableStringstringWithString:content];
NSRangerange=[content rangeOfString:obj];
NSIntegerlocation=0;
while(range.length>0) {
UIColor *color=nil;
if(!colors[idx]) {
color=[UIColor redColor];
}else{
color=colors[idx];
}
[attString addAttribute:(NSString*)NSForegroundColorAttributeNamevalue:color range:NSMakeRange(location+range.location, range.length)];
location+=(range.location+range.length);
NSString*tmp= [tmpString substringWithRange:NSMakeRange(range.location+range.length, content.length-location)];
tmpString=[NSMutableStringstringWithString:tmp];
range=[tmp rangeOfString:obj];
if(!repeat) {
break;
}
}
}];
}
returnattString;
}
content是根据网址获得的网页源码字符串
- (NSString*)changeToString:(NSString*)content{NSRegularExpression*regularExpretion=[NSRegularExpressionregularExpressionWithPattern:@"<[^>]*>|\n"options:0error:nil]; content = [regularExpretion stringByReplacingMatchesInString:content options:NSMatchingReportProgressrange:NSMakeRange(0, content.length) withTemplate:@"-"];// 替换所有html和换行匹配元素为"-"regularExpretion = [NSRegularExpressionregularExpressionWithPattern:@"-{1,}"options:0error:nil] ; content = [regularExpretion stringByReplacingMatchesInString:content options:NSMatchingReportProgressrange:NSMakeRange(0, content.length) withTemplate:@"-"];// 把多个"-"匹配为一个"-"// 根据"-"分割到数组NSArray*arr=[NSArrayarray]; content = [NSStringstringWithString:content]; arr = [content componentsSeparatedByString:@"-"];NSMutableArray*marr=[NSMutableArrayarrayWithArray:arr]; [marr removeObject:@""];NSMutableString*string = [[NSMutableStringalloc] init];for(inti =0; i < arr.count; i++) { [string appendString:[NSStringstringWithFormat:@"%@",arr[i]]]; }returnstring;}
