dispatch_async( dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0) , ^{ NSString *cachPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0]; NSArray *files = [[NSFileManager defaultManager] subpathsAtPath:cachPath]; NSLog(@"files :%d",[files count]); 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 { NSLog(@"清理成功"); }