loadFontFace回调不可用

wx.loadFontFace({

family: ‘bbt-font’,

source: ‘url(“http://qn.com/\*\*\*.ttf”)’,

success: (res) => {

console.log(res);

},

fail: (res) => {

console.log(res.status);

},

complete: () => {

console.log(‘complete’, arguments);

}

});

这三个回调都不执行？