读取plist文件数据(可显示中文)
Dictionary* dic = Dictionary::createWithContentsOfFile("string.plist");
auto s = (String*)dic->objectForKey("str");
CCLOG("%s", s->getCString());
auto lab = Label::create(s->getCString(), "Arial", 35);
lab->setPosition(Vec2(100, 100));
this->addChild(lab);

plist文件构成
