wx.loadFontFace开发工具没问题，手机（ios）报错errMsg"loadFontFace：fail"；
wx.loadFontFace({
  family: 'MYuanPRCSemiBoldx',
  source: 'url("http://cache.supersonicwx.com/dell_common/font/MYuenPRC-SemiBold.ttf")',
  success: (res) => {
    console.log(res);
    console.log('loadedFont')
  },
  fail: (res) => {
    console.log(res);
  }
});