下面介绍2种swift的字符串截取方法,实际上用到了substringFromIndex,substringToIndex,substringWithRange 1.将String转化为NSString再截取,代码如下: var s="1234567890"
var ns1=(s as NSString).substringFromIndex(5)
var ns2=(s as NSString)
var s="1234567890"
let index = s.startIndex.advancedBy(5) //swift 2.0+
let index2 = s.endIndex.advancedBy(-6) //swift 2.0+
var range = Range<String.Index>(start: index2,end: index)
var s1:String=s.s
什么是XPath表达式,我将用于获取每个书的“HarryPotter:”后面的字符串。 即。给定这个XML: <bookstore>
<book>
HarryPotter:Chamber of Secrets
</book>
<book>
HarryPotter:Prisoners in Azkabahn
</book>
</bookstore> 我会回来: Chamber of Se