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128 lines
3.8 KiB
128 lines
3.8 KiB
// |
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// DPClearCacheTool.m |
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// Ditpo |
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// |
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// Created by ArJun on 2017/9/24. |
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// Copyright © 2017年 Shenzhen Ditpo Technology Co. Ltd. All rights reserved. |
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// |
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#import "DPClearCacheTool.h" |
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#define fileManager [NSFileManager defaultManager] |
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#define cachePath [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject] |
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@implementation DPClearCacheTool |
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// 获取cachePath路径下文件夹大小 |
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+ (NSString *)getCacheSize { |
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// 调试 |
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#ifdef DEBUG |
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// 如果文件夹不存在或者不是一个文件夹那么就抛出一个异常 |
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// 抛出异常会导致程序闪退,所以只在调试阶段抛出，发布阶段不要再抛了,不然极度影响用户体验 |
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BOOL isDirectory = NO; |
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BOOL isExist = [fileManager fileExistsAtPath:cachePath isDirectory:&isDirectory]; |
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if (!isExist || !isDirectory) { |
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NSException *exception = [NSException exceptionWithName:@"文件错误" reason:@"请检查你的文件路径!" userInfo:nil]; |
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[exception raise]; |
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} |
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//发布 |
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#else |
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#endif |
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//获取“cachePath”文件夹下面的所有文件 |
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NSArray *subpathArray= [fileManager subpathsAtPath:cachePath]; |
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NSString *filePath = nil; |
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long long totalSize = 0; |
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for (NSString *subpath in subpathArray) { |
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// 拼接每一个文件的全路径 |
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filePath =[cachePath stringByAppendingPathComponent:subpath]; |
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// isDirectory，是否是文件夹，默认不是 |
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BOOL isDirectory = NO; |
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// isExist，判断文件是否存在 |
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BOOL isExist = [fileManager fileExistsAtPath:filePath isDirectory:&isDirectory]; |
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// 文件不存在,是文件夹,是隐藏文件都过滤 |
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if (!isExist || isDirectory || [filePath containsString:@".DS"]) continue; |
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// attributesOfItemAtPath 只可以获得文件属性，不可以获得文件夹属性，这个也就是需要遍历文件夹里面每一个文件的原因 |
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long long fileSize = [[fileManager attributesOfItemAtPath:filePath error:nil] fileSize]; |
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totalSize += fileSize; |
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} |
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// 将文件夹大小转换为 M/KB/B |
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NSString *totalSizeString = nil; |
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if (totalSize > 1000 * 1000) { |
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totalSizeString = [NSString stringWithFormat:@"%.1fM",totalSize / 1000.0f /1000.0f]; |
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} else if (totalSize > 1000) { |
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totalSizeString = [NSString stringWithFormat:@"%.1fKB",totalSize / 1000.0f ]; |
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} else { |
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totalSizeString = [NSString stringWithFormat:@"%.1fKB",totalSize / 1000.0f]; |
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} |
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return totalSizeString; |
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} |
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// 清除cachePath文件夹下缓存大小 |
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+ (BOOL)clearCaches { |
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// 拿到cachePath路径的下一级目录的子文件夹 |
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// contentsOfDirectoryAtPath:error:递归 |
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// subpathsAtPath:不递归 |
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NSArray *subpathArray = [fileManager contentsOfDirectoryAtPath:cachePath error:nil]; |
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// 如果数组为空，说明没有缓存或者用户已经清理过，此时直接return |
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if (subpathArray.count == 0) { |
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#ifdef DEBUG |
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NSLog(@"此缓存路径很干净,不需要再清理了"); |
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#else |
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#endif |
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return NO; |
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} |
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NSError *error = nil; |
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NSString *filePath = nil; |
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BOOL flag = NO; |
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for (NSString *subpath in subpathArray) { |
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filePath = [cachePath stringByAppendingPathComponent:subpath]; |
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if ([fileManager fileExistsAtPath:cachePath]) { |
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// 删除子文件夹 |
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BOOL isRemoveSuccessed = [fileManager removeItemAtPath:filePath error:&error]; |
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if (isRemoveSuccessed) { // 删除成功 |
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flag = YES; |
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} |
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} |
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} |
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if (NO == flag) { |
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#ifdef DEBUG |
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NSLog(@"提示:您已经清理了所有可以访问的文件,不可访问的文件无法删除"); // 调试阶段才打印 |
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#else |
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#endif |
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} |
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return flag; |
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} |
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@end
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