Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
583 views
in Technique[技术] by (71.8m points)

ios - Create a string with n blank spaces or other repeated character

I want to make a string with n blank spaces using Swift, but without using a for loop or manually like this:

// string with 5-blank space
var s = "      "
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

String already has a repeating:count: initializer just like Array (and other collections that adopt the RangeReplaceableIndexable protocol):

init(repeating repeatedValue: String, count: Int)

So you can just call:

let spaces = String(repeating: " ", count: 5) // -> "     "

Notice that the repeated parameter is a string, not just a character, so you can repeat entire sequences if you want:

let wave = String(repeating: "-=", count: 5) // -> "-=-=-=-=-="

Edit: Changed to Swift 3 syntax and removed discussion of Swift 1 type ambiguity issues. See the edit history if you need to work with old versions.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

1.4m articles

1.4m replys

5 comments

57.0k users

...