iOS清除缓存
参考：http://www.open-open.com/lib/view/open1425625126743.html
-(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;
}
-(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 +=[self 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;
}
-(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] cleanDisk];
}
NSString *cachPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask, YES) objectAtIndex:0]; //获取的缓存文件夹路径