//在 UITableView 上加手势
UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hiddenKeyboard)];
[self.tableView addGestureRecognizer:gesture];
- (void) hiddenKeyboard {
[textField resignFirstResponder];
}
//以上添加手势后，屏幕上方会出现点击无响应的情况，添加下句解决无响应问题
gesture.cancelsTouchesInView = NO;