Swift 字串替換/過濾/切割/拼接

標籤：swift   string   join   split   

原創blog，轉載請註明出處
blog.csdn.net/hello_hwc

之前寫過一篇Swift String的基礎，想瞭解的同學可以看下。
http://blog.csdn.net/hello_hwc/article/details/39853023

替換

把?替換為/

var url = "http://blog.csdn.net/hello_hwc?viewmode=list"var filtered = url.stringByReplacingOccurrencesOfString("?", withString: "/", options: NSStringCompareOptions.LiteralSearch, range: nil)

結果

"http://blog.csdn.net/hello_hwc/viewmode=list"

過濾

過濾掉單個字元/

var url = "http://blog.csdn.net/hello_hwc?viewmode=list"var filtered = url.stringByReplacingOccurrencesOfString("/", withString: "", options: NSStringCompareOptions.LiteralSearch, range: nil)

結果

"http:blog.csdn.nethello_hwc?viewmode=list"

過濾掉開頭和結尾的空白

var url = "   http://blog.csdn.net/hello_hwc?viewmode=list   "var newString = url.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceCharacterSet())

結果

"http://blog.csdn.net/hello_hwc?viewmode=list"

切割

對字串使用/作為分隔字元來切割，不允許Null 字元串
使用split函數

var url = "http://blog.csdn.net/hello_hwc?viewmode=list"let splitedarray = split(url){$0 == "/"}

結果是一個數組

"http:""blog.csdn.net""hello_hwc?viewmode=list"

對字串使用/作為分隔字元來切割，允許Null 字元串

var url = "http://blog.csdn.net/hello_hwc?viewmode=list"let arrayresult = split(url, maxSplit:url.lengthOfBytesUsingEncoding(NSUTF8StringEncoding), allowEmptySlices: true) { (char:Character) -> Bool in    return char == "/"}

結果

"http:""""blog.csdn.net""hello_hwc?viewmode=list"

拼接

let splitedarray = ["1","2","3"]let result = join("/", splitedarray)

結果

"1/2/3"

Swift 字串替換/過濾/切割/拼接