第一步:创建工具类-BDFileManagerTool
(1).h的代码
@interface BDFileManagerTool : NSFileManager /** 计算单个文件大小*/ + (float)fileSizeAtPath:(NSString *)path; /** 计算目录大小 */ +(float)folderSizeAtPath:(NSString *)path; /** 清除缓存*/ +(void)clearCache:(NSString *)path; @end
(2).m的代码
#import "BDFileManagerTool.h" #import "SDWebImageManager.h" @implementation BDFileManagerTool /** * 计算单个文件的大小 * * @param path 文件的路径 * * @return 大小 */ + (float)fileSizeAtPath:(NSString *)path { NSFileManager *fileManager=[NSFileManager defaultManager]; if([fileManager fileExistsAtPath:path]){ long long size=[fileManager attributesOfItemAtPath:path error:nil].fileSize; return size/1024.0/1024.0; } return 0; } /** * 计算目录大小 * * @param path 目录的路径 * * @return 目录的大小 */ +(float)folderSizeAtPath:(NSString *)path{ NSFileManager *fileManager=[NSFileManager defaultManager]; float folderSize; if ([fileManager fileExistsAtPath:path]) { NSArray *childerFiles=[fileManager subpathsAtPath:path]; for (NSString *fileName in childerFiles) { NSString *absolutePath=[path stringByAppendingPathComponent:fileName]; folderSize +=[BDFileManagerTool fileSizeAtPath:absolutePath]; } //SDWebImage框架自身计算缓存的实现 folderSize += [[SDImageCache sharedImageCache] getSize]/1024.0/1024.0; return folderSize; } return 0; } /** * 清楚缓存 * * @param path 缓存的路径 */ +(void)clearCache:(NSString *)path{ NSFileManager *fileManager=[NSFileManager defaultManager]; if ([fileManager fileExistsAtPath:path]) { NSArray *childerFiles=[fileManager subpathsAtPath:path]; for (NSString *fileName in childerFiles) { //如有需要,加入条件,过滤掉不想删除的文件 NSString *absolutePath=[path stringByAppendingPathComponent:fileName]; [fileManager removeItemAtPath:absolutePath error:nil]; } } [[SDImageCache sharedImageCache] clearDisk]; [YZTools toastMake:@"清除缓存成功" isPush:NO]; } @end
第二步:运用
//获取大小 - (void)getFileData { CGFloat fileSize = [BDFileManagerTool folderSizeAtPath:[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject]]; NSLog(@"fileSize------%.2f",fileSize); } //清理缓存 - (void)clearCache { [BDFileManagerTool clearCache:[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject]]; }