小程序线上图片转本地

			saveThe(url, callback) {
				wx.getImageInfo({
					src: url, //服务器返回的图片地址
					success: res => {
						callback(res.path);
						// console.log(res);
					},
					fail: function(res) {
						this.showToast('生成失败')
					}
				});
			},

调用

that.saveThe(that.is_true[m].image, path => {
									that.isTrue = path
								})