如何格式化插入字符串

本文介绍了如何格式化插入字符串的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我需要格式字符串，例如秒前发送％d ，哈利喜欢％s，我认为％1 $ s喜欢％2 $ s

I need format string like "Send %d seconds ago", "Harry like %s", "I think %1$s like %2$s". These can be implemented in Android, but i don't how to implement in Dart of Flutter.

推荐答案

Dart支持字符串插值

Dart supports string interpolation

var seconds = 5; print("Send $seconds seconds ago"); var harryLikes = 'Silvia'; var otherName = 'Erik'; var otherLikes = 'Chess'; print("Harry like $harryLikes"); print("I think $otherName like $otherLikes");

也可以使用 $ {...}

Also more complex expressions can be embedded with ${...}

print('Calc 3 + 5 = ${3 + 5}');

数字类型和 intl 软件包提供格式化数字和日期的更多方法。

The number types and the intl package provide more methods to format numbers and dates.

例如参见

• www.dartdocs/documentation/intl/latest/ intl / NumberFormat-class.html
• dart的货币格式

• www.dartdocs/documentation/intl/latest/intl/NumberFormat-class.html
• Currency format in dart