// zip解压
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        NSFileManager *fileManager = [NSFileManager defaultManager];
        NSString *zipPath = [[NSBundle mainBundle] pathForResource:@"ziptest" ofType:@"zip"];
        NSString *path = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject];
        NSString *createPath = [path stringByAppendingPathComponent:@"www"];
        NSLog(@"%@", createPath);
        if (![fileManager fileExistsAtPath:createPath]) {
            NSError *error = nil;
            [fileManager createDirectoryAtPath:createPath withIntermediateDirectories:YES attributes:nil error:&error];
        }
        NSString *laterPath = [createPath stringByAppendingPathComponent:@"ziptest"];
        if (![fileManager fileExistsAtPath:laterPath]) {
            ZipArchive *zipArchive = [[ZipArchive alloc] init];
            if ([zipArchive UnzipOpenFile:zipPath]) {
                BOOL ret = [zipArchive UnzipFileTo:createPath overWrite:YES];
                if (ret == NO) {
                    [zipArchive UnzipCloseFile];
                }
            }
        }
    });