计算单个文件大小
+(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
+(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 +=[FileService 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;
}
清除缓存
+(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];
}
}
}
SDWebImage框架自带请缓存方法
[[SDImageCache sharedImageCache] cleanDisk];
