Swift：无法用类型为'（$ 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。它返回行的错误， 回报compileShader（GLenum（GL_VERTEX_SHADER），ShaderCode）错误是不能援引 '初始化' 与类型的参数列表 '（$ T3，NSString的）'

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init方法，而是compileVertexShader和compileShader中的返回类型，而一个返回GLInt，其他返回GLuint。如果你改变这些以匹配，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; 
} 

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