Question

我想快速在同一行上左右对齐文本。例如，我有一个字符串，其产品名称在左侧，价格在右侧。两者在同一条线上。这可能吗？

在蓝牙打印中，每行正好有32个字符。我需要这样做。

Answer 1

如果我理解正确，那么您需要这样的东西：

func alignLeftAndRight(left: String, right: String, length: Int) -> String {
    // calculate how many spaces are needed
    let numberOfSpacesToAdd = length - left.count - right.count

    // create those spaces
    let spaces = Array(repeating: " ", count: numberOfSpacesToAdd < 0 ? 0 : numberOfSpacesToAdd).joined()

    // join these three things together
    return left + spaces + right
}

用法：

print(alignLeftAndRight(left: "Product", right: "Price", length: 32))
print(alignLeftAndRight(left: "Foo", right: "1", length: 32))
print(alignLeftAndRight(left: "Product", right: "123", length: 32))
print(alignLeftAndRight(left: "Something", right: "44", length: 32))
print(alignLeftAndRight(left: "Hello", right: "7777", length: 32))

输出：

Product                    Price
Foo                            1
Product                      123
Something                     44
Hello                       7777

在同一行中左右对齐

1 个答案: