成员函数的可访问性似乎随 SFML 中的范围而变化，C++ Xcode 中也是如此

虽然我可以在创建sf：：RectangleShape对象时访问成员.setPosition，但我似乎无法在不同的范围内访问.setPosition成员。帮助？我是Xcode的新手，但C++熟悉，不确定为什么这会导致错误。

class ShapeVisual : public sf::Drawable, public sf::Transformable {
public:
    int fillShape[16];
    int shapeWidth;
    int shapeHeight;
    sf::RectangleShape shapeBlock;
    float shapeBlockWidth;
    ShapeVisual() {
        shapeWidth = 4; shapeHeight = 4;
        Tetrominos::SetShape("T", &fillShape);
        shapeBlockWidth = 10.0;
        shapeBlock = sf::RectangleShape();
        shapeBlock.setPosition(0,0);
        shapeBlock.setOutlineColor(sf::Color::Green);
        shapeBlock.setSize(sf::Vector2f(shapeBlockWidth,shapeBlockWidth));
        shapeBlock.setFillColor(sf::Color(255,100,100));
    }

    virtual void draw(sf::RenderTarget& target, sf::RenderStates states) const {
        states.transform *= getTransform();
        for (int Bx = 0; Bx < this->shapeWidth; Bx++) {
        for (int By = 0; By < this->shapeHeight; By++) {
            shapeBlock.setPosition(Bx*shapeBlockWidth, By*shapeBlockWidth);
            //ERROR HERE: No matching member call for shapeBlock.setPosition.
            if (fillShape[Bx + By*shapeWidth] != 0) {
                target.draw(shapeBlock,states);
            }
        } }
    }
};

错误的确切文本是

/Volumes/Minerva/Users/dustinfreeman/Documents/Shapeshifter/Code/Shapeshifter/shapeshifter/shapeshifter/shapes.cpp:147:20: error: no matching member function for call to 'setPosition'
        shapeBlock.setPosition(Bx*shapeBlockWidth, By*shapeBlockWidth);
       ~~~~~~~~~~~^~~~~~~~~~~

/usr/local/include/SFML/Graphics/Transformable.hpp:70:10: note: candidate function not viable: no known conversion from 'const sf::RectangleShape' to 'sf::Transformable' for object argument
void setPosition(float x, float y);
     ^

/usr/local/include/SFML/Graphics/Transformable.hpp:84:10: note: candidate function not viable: requires single argument 'position', but 2 arguments were provided
void setPosition(const Vector2f& position);
     ^

下面是 sf：：RectangleShape 类的文档： http://www.sfml-dev.org/documentation/2.0/classsf_1_1RectangleShape.php

编辑：我将shapeBlock更改为指针，现在它似乎可以编译并运行良好。但是我找不到原始代码的问题。