计算缓存

//计算缓存大小

-(

NSString

*)getCacheSize{

   

//定义变量存储总的缓存大小

   

long long sumSize = 0

;

   

   

//获取当前图片缓存路径

   

NSString *cacheFilePath = [NSHomeDirectory() stringByAppendingPathComponent:@"Library/Caches"

];

   

//创建文件管理对象

   

NSFileManager *filemanager = [NSFileManager defaultManager

];

   

   

//获取当前缓存路径下的所有子路径

   

NSArray *subPaths = [filemanager subpathsOfDirectoryAtPath:cacheFilePath error:nil

];

   

   

//遍历所有子文件

   

for (NSString *subPath in

subPaths) {

       

//拼接完整路径

       

NSString *filePath = [cacheFilePath stringByAppendingFormat:@"/%@"

,subPath];

       

//计算文件的大小

       

long long fileSize = [[filemanager attributesOfItemAtPath:filePath error:nil]fileSize

];

       

//加载到文件的大小

        sumSize += fileSize;

         }

   

float size_m = sumSize/(1000*1000

);

   

return [NSString stringWithFormat:@"%.2fM"

,size_m];

}