我正在尝试在blockly
中创建一个自定义块,但似乎无法让它工作。我从block factory生成代码,这就是我得到的:
//say_input.js
Blockly.Blocks['say_input'] = {
init: function() {
this.appendDummyInput()
.appendField("say")
.appendField(new Blockly.FieldTextInput("something"), "say_input");
this.setColour(230);
this.setTooltip("");
this.setHelpUrl("");
}
};
Blockly.JavaScript['say_input'] = function(block) {
var text_say_input = block.getFieldValue('say_input');
// TODO: Assemble JavaScript into code variable.
// var code = 'alert("Hello! I am an alert box and'+text_say_input+'!");';
var code = '...;\n';
return code;
};
然后我将它导入我的html:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Blockly Demo: Fixed Blockly</title>
<script src="js/blockly_compressed.js"></script>
<script src="js/blocks_compressed.js"></script>
<script src="js/msg/js/en.js"></script>
<script src="js/blocks/say_input.js"></script>
<style>
body {
background-color: #fff;
font-family: sans-serif;
}
h1 {
font-weight: normal;
font-size: 140%;
}
</style>
</head>
<body>
<button onclick="runCode()">Click me</button>
<div id="blocklyDiv" style="height: 480px; width: 600px;"></div>
<xml id="toolbox" style="display: none;">
<block type="say_input">
<field name="say_input">something</field>
</block>
</xml>
<script>
var demoWorkspace = Blockly.inject('blocklyDiv', {
media: 'js/media/',
toolbox: document.getElementById('toolbox')
});
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>
</body>
</html>
并将其加载到浏览器。我立刻得到了这个错误:
无法设置未定义的属性'say_input'
错误出现在以下行:
Blockly.JavaScript['say_input'] = function(block) {
我的自定义功能块出现在工作区中,因此我确信链接正常。
我检查了this video,好像我没有做错任何事。
我该如何解决这个问题?
答案 0 :(得分:1)
我找到了解决方案。我必须链接javascript_compressed.js
,然后一切正常。
<script src="js/javascript_compressed.js"></script>
请务必在custom block.js
之前将其链接。