计算文件大小

判断单个文件大小

//单个文件的大小- (long long) fileSizeAtPath:(NSString*) filePath{ NSFileManager* manager = [NSFileManager defaultManager]; if ([manager fileExistsAtPath:filePath]){ return [[manager attributesOfItemAtPath:filePath error:nil] fileSize]; } return 0;}

通过计算来显示大小以MB为单位

long long fileSize = [[manager attributesOfItemAtPath:outputPath error:nil] fileSize];

 NSLog(@"%f MB",fileSize/(1024.0*1024.0));

//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);}