iosswiftinternationalization

iOS internationalization: What's the meaning of the placeholder?

Within "Localizable.xcstrings" string-catalog, for example "%lld click" or even more cryptic "%1$@-%2$@"?

What's there meaning? How have it to read and understood?

Solution

  • It's just an option to format your String with input parameters, for example String(format:arguments:).

    And in this situation, they are:

    let clicks = 10
let result = String(format: "%lld click(s)", clicks)
//"10 click(s)"

    let string1 = "Hello"
let string2 = "World"
let result = String(format: "%1$@-%2$@", string2, string1)
//"World-Hello"

    Notice: an improper format will result in a crash. e.g.

    let clicks = 10
let result = String(format: "%1$@-%2$@", clicks, clicks) //<- 💥 runtime crash