Cocos2dx Sprite&ImageView换图

Sprite

有两种方式：

1. 使用setTexture(Texture2D)函数，可以重新设置精灵类的纹理图片。
   /* Sets a new texture (from a filename) to the sprite.
   *通过文件名
   • @memberof Sprite
   • It will call setTextureRect() with the texture's content size.
     */
     virtual void setTexture(const std::string &filename );

/** @overload
* 通过纹理
* The Texture's rect is not changed.
*/
virtual void setTexture(Texture2D *texture) ;

2.精灵帧
/** @{
* Sets a new SpriteFrame to the Sprite.
/
virtual void setSpriteFrame(const std::string &spriteFrameName);
virtual void setSpriteFrame(SpriteFrame newFrame);

ImageView

只有一种方式：
/**
* Load texture for imageview.
*
* @param fileName file name of texture.
* @param texType @see Widget::TextureResType
*/
void loadTexture(const std::string& fileName,TextureResType texType = TextureResType::LOCAL);

其中：LOCAL为本地的图片，就是没有生成plist。PLIST就是通过SpriteFram加载的plist文件
/**
* Texture resource type.
* - LOCAL: It means the texture is loaded from image.
* - PLIST: It means the texture is loaded from texture atlas.
*/
enum class TextureResType
{
LOCAL = 0,
PLIST = 1
};

可视区域

sprite:
先设置setTexture;放一个大图
再进行setTextureRect设置可视区域
例如：
mj->setTexture(handAll->getTexture());
mj->setTextureRect(CCRectMake(texture->getPixelsWide() * 9 / 38, 0, texture->getPixelsWide() / 38, texture->getPixelsHigh()));