NSFileManager计算文件/文件夹大小

 1 - (NSInteger)fileSize{
 2     //文件管理者
 3     NSFileManager *mgr = [NSFileManager defaultManager];
 4     //判断字符串是否为文件/文件夹
 5     BOOL dir = NO;
 6     BOOL exists = [mgr fileExistsAtPath:self isDirctory:&dir];
 7     //文件/文件夹不存在
 8     if (exists == NO) return 0;
 9     //self是文件夹
10     if (dir){
11          //遍历文件夹中的所有内容
12          NSArray *subpaths = [mgr subpathsAtPath:self];
13          //计算文件夹大小
14          NSInteger totalByteSize = 0;
15          for (NSString *subpath in subpaths){
16               //拼接全路径
17                NSString *fullSubPath = [self stringByAppendingPathComponent:subpath];
18             //判断是否为文件
19             BOOL dir = NO;
20             [mgr fileExistsAtPath:fullSubPath isDirectory:&dir];
21             if (dir == NO){//是文件
22                    NSDictionary *attr = [mgr attributesOffItemAtPath:fullSubPath error:ni];
23                    totalByteSize += [attr[NSFileSize] integerValue];
24              }
25          }
26          return totalByteSize;      
27     } else{//是文件
28           NSDictionary *attr = [mgr attributesOffItemAtPath:self error:ni];
29            return [attr[NSFileSize] integerValue];
30    }   
31 }    

1 NSString *caches =[[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
2 Integer cachesSize = [caches fileSize];