/**
|
* 获取文件扩展名
|
*/
|
export function getFileSuffix(str) {
|
if (str) return str.substring(str.lastIndexOf('.') + 1, str.length)
|
return ''
|
}
|
|
/**
|
* 文件大小单位转换
|
* from:原数据
|
* to :类型 M kb b
|
* */
|
export function getFileUnitConversion(byte, from = 'B', to = 'M') {
|
from = from
|
.toString()
|
.toUpperCase()
|
.trim();
|
to = to
|
.toString()
|
.toUpperCase()
|
.trim();
|
switch (to) {
|
case 'M':
|
if (from == 'B') return (byte / Math.pow(1024, 2)).toFixed(2);
|
if (from == 'KB') return (byte / 1024).toFixed(2);
|
return (0).toFixed(2);
|
case 'KB':
|
if (from == 'M') return (byte * 1024).toFixed(2);
|
if (from == 'B') return (byte / 1024).toFixed(2);
|
return (0).toFixed(2);
|
case 'B':
|
if (from == 'M') return (byte * Math.pow(1024, 2)).toFixed(2);
|
if (from == 'KB') return (byte * 1024).toFixed(2);
|
return (0).toFixed(2);
|
default:
|
return (0).toFixed(2);
|
}
|
};
|
|
/**
|
* 图片预览
|
* @param {Number} current = [value] 索引
|
* @param {Array} images = [value] 图片数组
|
* @param {String} oUrlKey = [value] 图片的原图地址Key
|
*/
|
export function previewImages(current, images, oUrlKey = 'url') {
|
const urls = images.map(it => {
|
return it[oUrlKey];
|
});
|
uni.previewImage({
|
current,
|
urls,
|
loop: true,
|
indicator: 'number',
|
longPressActions: {
|
itemList: ['保存图片'],
|
success: res => {
|
uni.saveImageToPhotosAlbum({
|
filePath: res.tempFilePath,
|
success: res => {
|
console.log('图片保存成功');
|
}
|
});
|
}
|
}
|
});
|
}
|
