wx.showNavigationBarLoading(Object object)参数Object objectwx.showNavigationBarLoading(Object object)在当前页面显示导航条加载动画 参数Object object属性类型默认值必填说明successfunction否接口调用成功的回调函数failfunction否接口调用失败的回调函数completefunction否接口调用结束的回调函数(调用成功、失败都会执行)