通过应用themeData更改未聚焦的文本字段图标颜色

Question

我想更改未聚焦的“文本”字段图标的颜色。

通过原色，我可以像第二个文本字段一样更改焦点图标的颜色，我想更改第一个（未单击的颜色）。

我想在整个应用程序中进行更改，因此我在主MaterialApp中使用ThemeData

例如：我希望未聚焦的文本字段图标颜色为紫色，而聚焦的为红色。

Answer 1

使用var divide = function(dividend, divisor) { var returnValue = ""; var remainder = 0; var currentDividend = 0, currentQuotient; dividend.split("").forEach(function(digit, index) { // use classical digit by digit division if (currentDividend !== 0) { currentDividend = currentDividend * 10; } currentDividend += parseInt(digit); if (currentDividend >= divisor) { currentQuotient = Math.floor(currentDividend / divisor); currentDividend -= currentQuotient * divisor; returnValue += currentQuotient.toString(); } else if (returnValue.length > 0) { returnValue += "0"; } if (index === dividend.length - 1) { remainder = currentDividend; } }); return { quotient: returnValue.length === 0 ? "0" : returnValue, remainder: remainder }; }; var convertToIPv6 = function(input, base) { base = base || 10; var blocks = []; var blockSize = Math.pow(2, 16); // 16 bit per block while (blocks.length < 8) { var divisionResult = divide(input, blockSize); // The remainder is the block value blocks.unshift(divisionResult.remainder.toString(base)); // The quotient will be used as dividend for the next block input = divisionResult.quotient; } return blocks.join(":"); }; // Examples ["63802943797675961899382738893456539648", "16894619001915479834806084984789761616", "734987203501750431791304671034703170303" ].forEach(function(input) { console.log("Input:", input); console.log("IP address (decimal):", convertToIPv6(input)); console.log("IP address (hex):", convertToIPv6(input, 16)); });确定FocusNode何时未聚焦，然后将所需的颜色分配给TextField中的Icon()，并在聚焦时显示默认主题颜色：

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