/**
* 预览图片，并且长按保存
*
*/
export function previewImageAndSave(images, index) {
  uni.previewImage({ // 预览图片  图片路径必须是一个数组 => ["http://192.168.100.251:8970/6_1597822634094.png"]
  	current: index,
  	urls: images,
  	longPressActions: { //长按保存图片到相册
  		itemList: ['保存图片'],
  		success: (data) => {
			uni.downloadFile({
				url:images[data.index],
				success(res){
					let url = res.tempFilePath
					uni.saveImageToPhotosAlbum({
						filePath:url,
						success() {
							uni.showToast({
								title:'保存成功',
								icon:"none"
							})
						},
						fail(err) {
							uni.showToast({
								title:'保存失败',
								icon:"none"
						    })
						}
					})
				}
			})
  		},
  		fail: (err) => {
  		}
  	}
  });
}




/**
* 显示消息提示框
* @param content 提示的标题
*/
export function toast(content) {
  uni.showToast({
    icon: 'none',
    title: content
  })
}

/**
* 显示模态弹窗
* @param content 提示的标题
*/
export function showConfirm(content) {
  return new Promise((resolve, reject) => {
    uni.showModal({
      title: '提示',
      content: content,
      cancelText: '取消',
      confirmText: '确定',
      success: function(res) {
        resolve(res)
      }
    })
  })
}

/**
* 参数处理
* @param params 参数
*/
export function tansParams(params) {
  let result = ''
  for (const propName of Object.keys(params)) {
    const value = params[propName]
    var part = encodeURIComponent(propName) + "="
    if (value !== null && value !== "" && typeof (value) !== "undefined") {
      if (typeof value === 'object') {
        for (const key of Object.keys(value)) {
          if (value[key] !== null && value[key] !== "" && typeof (value[key]) !== 'undefined') {
            let params = propName + '[' + key + ']'
            var subPart = encodeURIComponent(params) + "="
            result += subPart + encodeURIComponent(value[key]) + "&"
          }
        }
      } else {
        result += part + encodeURIComponent(value) + "&"
      }
    }
  }
  return result
}