regionchange真机测试为什么没有经纬度呢？
- causedBy: "update"
- currentTarget: {dataset: {…}, id: "myMap", offsetTop: 58, offsetLeft: 0}
- detail:
- gesture: undefined
- rotate: 0
- skew: 0
- type: "end"
- __proto__: Object
- mp: {target: {…}, currentTarget: {…}, timeStamp: 1605152584040, touches: Array(0), detail: {…}, …}
- preventDefault: ƒ B()
- stopPropagation: ƒ B()
- target: {dataset: {…}, id: "myMap", offsetTop: 58, offsetLeft: 0, type: "end", …}
- timeStamp: 1605152584040
- touches: []