Swift:无法使用类型为'($ t3,NSString)'的参数列表调用'init'

Question

在第一个函数中,我无法弄清楚我做错了什么.它在行中返回一个错误, 返回compileShader(GLenum(GL_VERTEX_SHADER),ShaderCode)错误是无法使用类型'($ t3,NSString)'的参数列表调用'init'

class ShaderHelper{

    class func compileVertexShader(ShaderCode: NSString) ->GLint{
        return compileShader(GLenum(GL_VERTEX_SHADER), ShaderCode)
    }

    class func compileShader(type: GLenum, shaderCode: NSString) -> GLuint{
        var shaderObjectId = glCreateShader(type);

        if(shaderObjectId == 0){
            if(LoggerConfig.props.On){
                println("Could not create new shader!")
            }
            return 0
        }

        var shaderStringUTF8 = shaderCode.cStringUsingEncoding(NSUTF8StringEncoding)
        var shaderStringLength: GLint = GLint(Int32(shaderCode.length));

        glShaderSource(shaderObjectId, 1, &shaderStringUTF8, &shaderStringLength)
        glCompileShader(shaderObjectId)

        var compileStatus = GLint()

        glGetShaderiv(shaderObjectId, GLenum(GL_COMPILE_STATUS), &compileStatus)

        if(compileStatus == 0){
            if(LoggerConfig.props.On){
                println("Compilation of shader failed.")
            }
            glDeleteShader(shaderObjectId)
            return 0
        }else if (compileStatus == 1){
            if(LoggerConfig.props.On){
                println("Compilation Successful")
            }

        }
        return shaderObjectId;
    }

Answer 1

这里的问题不是使用init方法而是使用compileVertexShader和compileShader中的返回类型,而一个返回GLInt而其他返回GLuint.如果你改变那些匹配,你的错误应该消失.

class ShaderHelper{

    class func compileVertexShader(ShaderCode: NSString) ->GLuint{
        return compileShader(GLenum(GL_VERTEX_SHADER), shaderCode: ShaderCode)
    }

    class func compileShader(type: GLenum, shaderCode: NSString) -> GLuint{
        var shaderObjectId = glCreateShader(type);

        if(shaderObjectId == 0){
            if(LoggerConfig.props.On){
                println("Could not create new shader!")
            }
            return 0
        }

        var shaderStringUTF8 = shaderCode.cStringUsingEncoding(NSUTF8StringEncoding)
        var shaderStringLength: GLint = GLint(Int32(shaderCode.length));

        glShaderSource(shaderObjectId, 1, &shaderStringUTF8, &shaderStringLength)
        glCompileShader(shaderObjectId)

        var compileStatus = GLint()

        glGetShaderiv(shaderObjectId, GLenum(GL_COMPILE_STATUS), &compileStatus)

        if(compileStatus == 0){
            if(LoggerConfig.props.On){
                println("Compilation of shader failed.")
            }
            glDeleteShader(shaderObjectId)
            return 0
        }else if (compileStatus == 1){
            if(LoggerConfig.props.On){
                println("Compilation Successful")
            }

        }
        return shaderObjectId;
}

在调试时,错误swift提供了很多意义.你应该仔细选择参数类型和返回类型,它应该没问题.