iOS 清理缓存

- (void)clearCaChe
{
       NSString *cachPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];
        NSArray *files = [[NSFileManager defaultManager] subpathsAtPath:cachPath];
        for (NSString *p in files) {
            NSError *error;
            NSString *path = [cachPath stringByAppendingPathComponent:p];
            if ([[NSFileManager defaultManager] fileExistsAtPath:path]) {
                [[NSFileManager defaultManager] removeItemAtPath:path error:&error];
            }
        }
        [self performSelectorOnMainThread:@selector(clearCacheSuccess) withObject:nil waitUntilDone:YES];
}


- (void)clearCacheSuccess
{
   //清理成功后要做的操作
}