我正在使用此代码在博客上显示“最近的帖子”
function showrecentpostswiththumbs(json){document.write('<ul class="recent_posts_with_thumbs">');for(var i=0;i<numposts;i++){var entry=json.feed.entry[i];var posttitle=entry.title.$t;var posturl;if(i==json.feed.entry.length)break;for(var k=0;k<entry.link.length;k++){if(entry.link[k].rel=='replies'&&entry.link[k].type=='text/html'){var commenttext=entry.link[k].title;var commenturl=entry.link[k].href;}
if(entry.link[k].rel=='alternate'){posturl=entry.link[k].href;break;}}var thumburl;try{thumburl=entry.media$thumbnail.url;}catch(error)
{s=entry.content.$t;a=s.indexOf("<img");b=s.indexOf("src=\"",a);c=s.indexOf("\"",b+5);d=s.substr(b+5,c-b-5);if((a!=-1)&&(b!=-1)&&(c!=-1)&&(d!="")){thumburl=d;}else thumburl='';}
var postdate=entry.published.$t;var cdyear=postdate.substring(0,4);var cdmonth=postdate.substring(5,7);var cdday=postdate.substring(8,10);var monthnames=new Array();monthnames[1]="Jan";monthnames[2]="Feb";monthnames[3]="Mar";monthnames[4]="Apr";monthnames[5]="May";monthnames[6]="Jun";monthnames[7]="Jul";monthnames[8]="Aug";monthnames[9]="Sep";monthnames[10]="Oct";monthnames[11]="Nov";monthnames[12]="Dec";document.write('<li class="clearfix">');if(showpostthumbnails==true)
document.write('<img class="recent_thumb" src="'+thumburl+'"/>');document.write('<b><a href="'+posturl+'" target ="_top">'+posttitle+'</a></b><br>');if("content"in entry){var postcontent=entry.content.$t;}
else
if("summary"in entry){var postcontent=entry.summary.$t;}
else var postcontent="";var re=/<\S[^>]*>/g;postcontent=postcontent.replace(re,"");if(showpostsummary==true){if(postcontent.length<numchars){document.write('<i>');document.write(postcontent);document.write('</i>');}
else{document.write('<i>');postcontent=postcontent.substring(0,numchars);var quoteEnd=postcontent.lastIndexOf(" ");postcontent=postcontent.substring(0,quoteEnd);document.write(postcontent+'...');document.write('</i>');}}
var towrite='';var flag=0;document.write('<br><strong>');if(showpostdate==true){towrite=towrite+monthnames[parseInt(cdmonth,10)]+'-'+cdday+' - '+cdyear;flag=1;}
if(showcommentnum==true)
{if(flag==1){towrite=towrite+' | ';}
if(commenttext=='1 Comments')commenttext='1 Comment';if(commenttext=='0 Comments')commenttext='No Comments';commenttext='<a href="'+commenturl+'" target ="_top">'+commenttext+'</a>';towrite=towrite+commenttext;flag=1;;}
if(displaymore==true)
{if(flag==1)towrite=towrite+' | ';towrite=towrite+'<a href="'+posturl+'" class="url" target ="_top">More -></a>';flag=1;;}
document.write(towrite);document.write('</strong></li>');if(displayseparator==true)
if(i!=(numposts-1))
document.write('<hr size=0.5>');}document.write('</ul>');}
问题在于图像的分辨率非常低。
图像的链接包含s72-c，如何将其更改为更高的质量？
如果您能为我提供帮助，我会很高兴，我需要更改什么，如何更改，对不起我的英语，谢谢！！
答案 0 :(得分：1)
缩略图的默认大小为72像素平方，因此您必须用自己的大小替换缩略图URL中的/s72-c/。
1-搜索
entry.media$thumbnail.url;
2-替换为
entry.media$thumbnail.url.replace(/\/s72\-c\//,'/s300/');
将300更改为所需的宽度。
代码段
<script>
var numposts = 5,
showpostthumbnails = true,
showpostsummary = false,
numchars = 0,
showpostdate = false,
showcommentnum = false,
displaymore = false,
displayseparator = true;
function showrecentpostswiththumbs(json) {
document.write('<ul class="recent_posts_with_thumbs">');
for (var i = 0; i < numposts; i++) {
var entry = json.feed.entry[i];
var posttitle = entry.title.$t;
var posturl;
if (i == json.feed.entry.length) break;
for (var k = 0; k < entry.link.length; k++) {
if (entry.link[k].rel == 'replies' && entry.link[k].type == 'text/html') {
var commenttext = entry.link[k].title;
var commenturl = entry.link[k].href;
}
if (entry.link[k].rel == 'alternate') {
posturl = entry.link[k].href;
break;
}
}
var thumburl;
try {
thumburl = entry.media$thumbnail.url.replace(/\/s72\-c\//,'/s300/');
} catch (error) {
s = entry.content.$t;
a = s.indexOf("<img");
b = s.indexOf("src=\"", a);
c = s.indexOf("\"", b + 5);
d = s.substr(b + 5, c - b - 5);
if ((a != -1) && (b != -1) && (c != -1) && (d != "")) {
thumburl = d;
} else thumburl = '';
}
var postdate = entry.published.$t;
var cdyear = postdate.substring(0, 4);
var cdmonth = postdate.substring(5, 7);
var cdday = postdate.substring(8, 10);
var monthnames = new Array();
monthnames[1] = "Jan";
monthnames[2] = "Feb";
monthnames[3] = "Mar";
monthnames[4] = "Apr";
monthnames[5] = "May";
monthnames[6] = "Jun";
monthnames[7] = "Jul";
monthnames[8] = "Aug";
monthnames[9] = "Sep";
monthnames[10] = "Oct";
monthnames[11] = "Nov";
monthnames[12] = "Dec";
document.write('<li class="clearfix">');
if (showpostthumbnails == true)
document.write('<img class="recent_thumb" src="' + thumburl + '"/>');
document.write('<b><a href="' + posturl + '" target ="_top">' + posttitle + '</a></b><br>');
if ("content" in entry) {
var postcontent = entry.content.$t;
} else
if ("summary" in entry) {
var postcontent = entry.summary.$t;
} else var postcontent = "";
var re = /<\S[^>]*>/g;
postcontent = postcontent.replace(re, "");
if (showpostsummary == true) {
if (postcontent.length < numchars) {
document.write('<i>');
document.write(postcontent);
document.write('</i>');
} else {
document.write('<i>');
postcontent = postcontent.substring(0, numchars);
var quoteEnd = postcontent.lastIndexOf(" ");
postcontent = postcontent.substring(0, quoteEnd);
document.write(postcontent + '...');
document.write('</i>');
}
}
var towrite = '';
var flag = 0;
document.write('<br><strong>');
if (showpostdate == true) {
towrite = towrite + monthnames[parseInt(cdmonth, 10)] + '-' + cdday + ' - ' + cdyear;
flag = 1;
}
if (showcommentnum == true) {
if (flag == 1) {
towrite = towrite + ' | ';
}
if (commenttext == '1 Comments') commenttext = '1 Comment';
if (commenttext == '0 Comments') commenttext = 'No Comments';
commenttext = '<a href="' + commenturl + '" target ="_top">' + commenttext + '</a>';
towrite = towrite + commenttext;
flag = 1;;
}
if (displaymore == true) {
if (flag == 1) towrite = towrite + ' | ';
towrite = towrite + '<a href="' + posturl + '" class="url" target ="_top">More -></a>';
flag = 1;;
}
document.write(towrite);
document.write('</strong></li>');
if (displayseparator == true)
if (i != (numposts - 1))
document.write('<hr size=0.5>');
}
document.write('</ul>');
}
</script>
<script type='text/javascript' src='https://levon-ltr.blogspot.com/feeds/posts/summary?alt=json-in-script&callback=showrecentpostswiththumbs'></script>