uniapp 小程序获取当前定位的方法

getLocation() {
		let {locationEnabled }=wx.getSystemInfoSync();
		if(locationEnabled){
			return new Promise((resolve, reject) => {
				let _locationChangeFn = res => {
					console.log('location change', res);
					resolve({
						lat: res.latitude,
						lng: res.longitude
					});
					wx.offLocationChange();
					wx.stopLocationUpdate();
				};
				wx.startLocationUpdate({
					success: res => {
						wx.onLocationChange(_locationChangeFn);
					},
					fail: err => {
						console.log('获取当前位置失败', err);
						wx.showModal({
							title: '温馨提示',
							content: '获取权限失败，需要获取您的地理位置才能为您提供更好的服务！是否授权获取地理位置？',
							confirmText: '前往设置',
							cancelText: '取消',
							success: res => {
								if (res.confirm) {
									wx.openSetting({
										success: async res => {
											console.log(res);
											if (res.authSetting[
													'scope.userLocation']) {
												wx.showToast({
													title: '授权成功请继续',
													icon: 'success'
												})
											}
										}
									});
								}
							}
						});
						reject(err);
					}
				});
			});
		} else {
			wx.showToast({
				title: '请检查手机定位是否开启',
				icon: 'none'
			})
			return new Promise((resolve, reject) => {
				reject()
			})
		}
	},