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

Question

在第一个函数中我不知道我做错了什么。它在行中返回一个错误， return compileShader(GLenum(GL_VERTEX_SHADER), ShaderCode)错误是Cannot invoke 'init' with an argument list of type '($t3, NSString)'

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

这里的问题不在于 init 方法，而在于 compileVertexShader 和 compileShader 中的返回类型，而一个返回 GLInt，另一个返回 GLuint。如果您更改它们以匹配，您的错误应该消失。

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;
}

错误 swift 在调试时提供了很多没有意义的东西。您应该仔细选择参数类型和返回类型，它应该没问题。