when customizing the method, you need to determine whether there is a file locally, so you need to call the getFileInfo method, and then process the file
.function getLocalIcon(name) {
let iconPath = "../images/category_ico/";
let tail = ".png";
var link = iconPath + name + tail;
var ret = "";
wx.getFileInfo({
filePath: link,
success: function (data) {
ret = link;
},
fail: function (data) {
ret = hosts + "icon/" + name + tail;
},
complete: function(){
console.log(ret); //
return ret;
}
})
return ret;
}call method
icon = parseInt(bean.icon) == 0 ? wxLink.getLocalIcon(bean.img_url) : wxLink.getImgLink(bean.img_url,"icon");
console.log(icon) // print order is print two print one.
executes the wx.getFielInfo method when the method getLocalIcon is called, but when executing the wx.getFielInfo result, it returns the great gods of ret, who want to consult the forum. How to set the wait to let the result pause return first when calling wx.getFieldInfo?
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var link = iconPath + name + tail;
var ret = '';
wx.getFileInfo({
filePath: link,
success: function (data) {
ret = link;
},
fail: function (data) {
ret = hosts + 'icon/' + name + tail;
return callback && callback(ret);
},
complete: function(){
console.log(ret); //
return callback && callback(null, ret);
}
})
}
if(parseInt(bean.icon) == 0) {
wxLink.getLocalIcon(bean.img_url, function(err, data) {
if(err) {
console.log(err);
} else {
console.log(data); //
}
})
} else {
icon = wxLink.getImgLink(bean.img_url,'icon');
console.log(icon); //
}
</code></pre>
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