我用的是cocos2dx2.2版本，textfield的settouchsize 只是一个样式，点击输入框的时候只有点击到文字才能进行输入，当文本长度很短视，体验感差的不行

直接说方法吧，废话也没人看、、

为要点击的区域增加 imageview

exchangeTextBg = dynamic_cast<ImageView *>(ui->getWidgetByName("reward_exchange_bg_0"));
	exchangeTextBg->setTouchEnabled(true);
	exchangeTextBg->addTouchEventListener(this,toucheventselector(RewardExchangePanel::onTouchExhcangeTextBg));

exchangeTextField = dynamic_cast<TextField *>(ui->getWidgetByName("reward_exchange_text"));

void onTouchExhcangeTextBg(CCObject *target,TouchEventType type);

void RewardExchangePanel::onTouchExhcangeTextBg(CCObject *target,TouchEventType type)
{
	if( type != TouchEventType::TOUCH_EVENT_ENDED) return;
	exchangeTextField->attachWithIME();   
	exchangeTextField->setColor(ccc3(70,155,87));

}