對帳單
陳述式區塊是沒有輸出連線的區塊,行為就像
陳述式
如同 Blockly 的所有區塊,陳述式區塊也能轉換為程式碼
定義區塊程式碼產生器
import {javascriptGenerator} from 'blockly/javascript';
javascriptGenerator.forBlock['custom_block'] = function(block, generator) {
// Collect argument strings.
const fieldValue = block.getFieldValue('MY_FIELD');
const innerCode = generator.statementToCode(block, 'MY_STATEMENT_INPUT');
// Return code.
return 'my code string';
}
收集引數字串
所有區塊程式碼產生器都需要
收集欄位值並收集
內部區塊
// Collect field values.
const fieldValue = block.getFieldValue('MY_FIELD');
// Collect inner block code strings.
const innerCode = generator.statementToCode(block, 'MY_STATEMENT_INPUT');
如果多次參照內部區塊的程式碼,
引數快取。
傳回值
陳述式區塊程式碼產生器的傳回類型是代碼字串。
return 'my code string';
除非另有註明,否則本頁面中的內容是採用創用 CC 姓名標示 4.0 授權,程式碼範例則為阿帕契 2.0 授權。詳情請參閱《Google Developers 網站政策》。Java 是 Oracle 和/或其關聯企業的註冊商標。
上次更新時間:2024-10-15 (世界標準時間)。
[null,null,["上次更新時間:2024-10-15 (世界標準時間)。"],[[["Statement blocks in Blockly, similar to statements in text-based languages, lack output connections and function by defining a block-code generator to convert them into code strings."],["Generating code for statement blocks involves collecting values from fields and inner blocks using dedicated functions within the block-code generator."],["Block-code generators for statement blocks return code strings, representing the translated code for the block, and optionally incorporate argument caching for optimized code generation."]]],["Statement blocks, which lack output connections, are converted to code strings using block-code generators. This process involves collecting values from fields and code from inner blocks. The `getFieldValue` method retrieves field values, while `statementToCode` gathers inner block code. If inner block code is used multiple times, argument caching is recommended. Ultimately, a statement block-code generator returns a string representing the generated code.\n"]]