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/** * 清理缓存第二种方法 * * @param sender <#sender description#> */- (void)clearCache:(id)sender{ //彻底清除缓存第一种方法 UIButton * button = sender; [button setTitle:@"清理完毕" forState:UIControlStateNormal]; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES); NSString *path = [paths lastObject]; NSString *str = [NSString stringWithFormat:@"缓存已清除%.1fM", [self folderSizeAtPath:path]]; NSLog(@"%@",str); NSArray *files = [[NSFileManager defaultManager] subpathsAtPath:path]; for (NSString *p in files) { NSError *error; NSString *Path = [path stringByAppendingPathComponent:p]; if ([[NSFileManager defaultManager] fileExistsAtPath:Path]) { [[NSFileManager defaultManager] removeItemAtPath:Path error:&error]; } }}/** * 计算单个文件大小 */- (long long) fileSizeAtPath:(NSString*) filePath{ NSFileManager* manager = [NSFileManager defaultManager]; if ([manager fileExistsAtPath:filePath]){ return [[manager attributesOfItemAtPath:filePath error:nil] fileSize]; } return 0;}/** * 计算目录大小 遍历文件夹获得文件夹大小，返回多少M */- (float ) folderSizeAtPath:(NSString*) folderPath{ NSFileManager* manager = [NSFileManager defaultManager]; if (![manager fileExistsAtPath:folderPath]) return 0; NSEnumerator *childFilesEnumerator = [[manager subpathsAtPath:folderPath] objectEnumerator]; NSString* fileName; long long folderSize = 0; while ((fileName = [childFilesEnumerator nextObject]) != nil){ NSString* fileAbsolutePath = [folderPath stringByAppendingPathComponent:fileName]; folderSize += [self fileSizeAtPath:fileAbsolutePath]; } return folderSize/(1024.0*1024.0);} |
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原文地址：http://www.cnblogs.com/bugismyalllife/p/4884308.html
