extension String {
func substr(pos: Int,len:Int = -1) -> String {
if pos + len > count(self) {
return ""
}
let start = advance(self.startIndex,pos)
let end = (-1 == len ?self.endindex :advance(self.startIndex,pos + len))
return self.substringWithRange(Range(start:start,end:end))
}
func split(sep: String) -> [String] {
returnself.componentsSeparatedByString(sep)
}
func find(substr: String) ->Int? {
if let range = self.rangeOfString(substr) {
return distance(self.startIndex,range.startIndex)
} else {
return nil
}
}
func findLast(substr: String) -> Int? {
if let range = self.rangeOfString(substr,options:NsstringCompareOptions.BackwardsSearch) {
return distance(self.startIndex,range.startIndex)
} else {
return nil
}
}
func trimmed() -> String {
returnself.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceCharacterSet())
}
func replace(before: String,after:String) -> String {
return self.stringByReplacingOccurrencesOfString(before,withString: after)
}
func date() -> String {
var curDate = NSDate()
var timeFormatter = NSDateFormatter()
timeFormatter.dateFormat = self // "yyyyMMddHHmmss"
return timeFormatter.stringFromDate(curDate)
}
func date(date: NSDate) -> String {
var timeFormatter = NSDateFormatter()
timeFormatter.dateFormat = self
return timeFormatter.stringFromDate(date)
}
}
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