iOS关于如何去除空格和回车以及字典转json

    //去除空格和回车

    func trimLineString(str:String)->String{

       
//去除字符串首尾的空格和回车

        let nowStr0 = str.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet())

        //将回车替换成空字符

        let nowStr1 = nowStr0.stringByReplacingOccurrencesOfString("\n",
withString: "")

        //将空格替换成空字符

        let nowStr2 = nowStr1.stringByReplacingOccurrencesOfString(" ",
withString: "")

        return nowStr2

    }

    

    func toJSONString(dict:NSDictionary!)->NSString{

        

        let data =try?NSJSONSerialization.dataWithJSONObject(dict,
options:NSJSONWritingOptions.PrettyPrinted)

        let strJson =NSString(data: data!, encoding:NSUTF8StringEncoding)

        return strJson!

    }