Question

我对React还是很陌生，经常遇到一些关于语法安静的麻烦。以下代码给我错误：声明或声明应为ts（1128）

扫描互联网，我得出的结论是很可能缺少括号？！

import React, { Component } from 'react';
import AuthContext from './AuthContext';

// Then create a provider Component to update children Components once the user role changes
class AuthProvider extends Component {
    constructor() {
      super()
      this.state = {
          role: "none"
      }
  }

  render() {
    return (
      <AuthContext.Provider value={{
        state: this.state,
        isAuthenticated: () => {
          if (this.state.role == "kursleiter" || this.state.role == "admin") {
            return true
          }
          return false},
        setRole: (newRole) => this.setState({
            role: newRole
        })
      }}>
        {this.props.children}
      </AuthContext.Provider>
    )
  }
}

export default AuthProvider

Answer 1

您需要将代码提取到函数中，以便可以调用它们。示例：

  GLint modelLoc = glGetUniformLocation(ourShader.Program, "model");
  GLint viewLoc = glGetUniformLocation(ourShader.Program, "view");
  GLint projLoc = glGetUniformLocation(ourShader.Program, "projection");

  glm::mat4 projection = ... already known ...
  glUniformMatrix4fv(projLoc, 1, GL_FALSE, glm::value_ptr(projection));

  glm::mat4 view = glm::mat4(1.0f);
  // adjust to the layout of your scene
  view = glm::translate(view, glm::vec3(0.0f, 0.0f, -10.0f));
  glUniformMatrix4fv(viewLoc, 1, GL_FALSE, glm::value_ptr(view));

  for(unsigned int i = 0; i < 25; i++)
  {
    glm::mat4 model = glm::mat4(1.0f);
    model = glm::translate(model, cubePositions[i]);

    // the same rotation rate but a different offset for each object
    float angle = 20.0f * i;
    angle += std::fmod(glfwGetTime() * 20.0f, 360.0f);
    // choose x or y rotation axis
    auto axis=(i%2) ? glm::vec3(1.0f, 0.0f, 0.0f) : glm::vec3(0.0f, 1.0f, 0.0f);
    model = glm::rotate(model, glm::radians(angle), axis);

    glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(model));

    glDrawArrays(GL_TRIANGLES, 0, 36);
  }

现在，您可以使用：

const isAuthenticated = () => {
 // ...
}

之前，您使用的是函数，但不是函数。因此，React导致您对预期语句的错误抛出。

Answer 2

我的网站上超级愚蠢：文件名不匹配，仅此而已。

React组件：声明或声明应为ts（1128）

2 个答案: