https://developers.weixin.qq.com/miniprogram/dev/api/media/map/MapContext.addArc.html

mapCtx.addArc({
        id: 1,
        start: {
            longitude: 121.4413244560202, 
            latitude: 37.50917259663335
        },
        end: {
            longitude: 121.44547,
            latitude: 37.51104
        },
        color: '#73e6e0',
        angle: 45,
        // pass: {
        //     longitude: ul.lng,
        //     latitude: ul.lat
        // },
        success: (r) => {
            console.log('success-r', r)// 真机调试 打印 addMapArc:ok 但没有任何效果
        },
        fail: err => {
            console.log('fail-err', err)
        }
    });