Resize string in Swift

Question

With notifications I can't exceed more than 256 characters. I need to resize a string to be 200 characters maximum.

How could I, for example if I have an string of 210 characters, resize it to 197 and the rest "...". But if I have one string of 100 characters, don't resize it because it fits in the notification.

Thanks.

Answer 1

let str = "With notifications I can't exceed more than 256 characters. I need to resize a string to be 200 characters maximum. How could I, for example if I have an string of 210 characters, resize it to 197 and the rest \"...\". But if I have one string of 100 characters, don't resize it because it fits in the notification."

func foo(str: String, width: Int)->String {
    let length = str.characters.count
    if length > width {
        let d = length - width + 3
        let n = d < 0 ? 0 : d
        let head = str.characters.dropLast(n)
        return String(head) + "..."
    }
    return str
}

foo(str, width: 10) // "With no..."
print(foo(str, width: 200))
/*
With notifications I can't exceed more than 256 characters. I need to resize a string to be 200 characters maximum. How could I, for example if I have an string of 210 characters, resize it to 197 ...
*/