Question

我想为我的blockly生成javascript，它没有任何输入。我从生成器存根获得了Javascript函数，但它需要将javascript代码汇编到 var code 变量中，而我并没有这样做。我已经尝试过了：

var code = Blockly.JavaScript.workspaceToCode(workspace);

但它显示我的代码未定义。

我收到此错误：

Cannot read property 'call' of undefined at Blockly.Generator.blockToCode (blockly_compressed.js:1572) at Blockly.Generator.workspaceToCode (blockly_compressed.js:1570)

你能帮我解决一下我如何生成javascript代码并组装它？

Answer 1

这是生成JS代码并运行它的方法：

  <script>
    var workspace = Blockly.inject('blocklyDiv',
        {media: '../../media/',
         toolbox: document.getElementById('toolbox')});
    Blockly.Xml.domToWorkspace(document.getElementById('startBlocks'),
                               workspace);

    // Generate JavaScript code and display it.
    function showCode() {
      Blockly.JavaScript.INFINITE_LOOP_TRAP = null;
      var code = Blockly.JavaScript.workspaceToCode(workspace);
      alert(code);
    }

    // Generate JavaScript code and run it.
    function runCode() {
      window.LoopTrap = 1000;
      Blockly.JavaScript.INFINITE_LOOP_TRAP =
          'if (--window.LoopTrap == 0) throw "Infinite loop.";\n';
      var code = Blockly.JavaScript.workspaceToCode(workspace);
      Blockly.JavaScript.INFINITE_LOOP_TRAP = null;
      try {
        eval(code);
      } catch (e) {
        alert(e);
      }
    }
  </script>

如何在块中生成javascript代码

1 个答案: