Question

我有一个像这样的字符串：

var aString = "This is a string \n\n This is the second line of the string\n\n"

textview中的内容如下：

This is a string 

This is the second line of the string


// 2 extra lines of unnecessary white space

但我希望它看起来像这样：

This is a string 
This is the second line of the string

我想从字符串的末尾删除所有“\ n”并删除\ n，它会重复自身，因此中间没有空格。

理想情况下，我猜测最终结果应该是这样的：

var aString = "This is a string \n This is the second line of the string"

Answer 1

这是怎么回事？

var aString = "This is a string \n\n\n This is the second line of the string\n\n"
// trim the string
aString.trimmingCharacters(in: CharacterSet.newlines)
// replace occurences within the string
while let rangeToReplace = aString.range(of: "\n\n") {
    aString.replaceSubrange(rangeToReplace, with: "\n")
}

Answer 2

您的代码的基本思想是用单个/ n替换所有double / n。

var aString = "This is my string"
var newString = aString.replacingOccurrences(of: "/n/n", with: "/n")

Answer 3

试试这个

cf.input :device_identifier, input_html: { readonly: !cf.object.new_record? }

从字符串中删除换行符

3 个答案: