IOS之Foundation之探究学习Swift实用基础整理<一>

 import Foundation

 //加载网络数据，查找数据的字符串
 let dataurl = "http://api.k780.com:88/?app=weather.city&&appkey=10003&sign=b59bc3ef6191eb9f747dd4e83c99f2a4&format=json"
 var url = NSURL(string: dataurl)
 var httpData = NSData(contentsOfURL: url!)
 //println(httpData) //输出来都是数字 字节码
 var httpstr = NSString(data: httpData!, encoding: NSUTF8StringEncoding)
 //println(httpstr) //转为NSString就是 可观的数据了。
 let subRange = httpstr?.rangeOfString("玉山")
 println("\(subRange!.location) 和 \(subRange!.length)")

 var findRange = NSMakeRange(subRange!.location-, )
 var findStr = httpstr!.substringWithRange(findRange)
 println(findStr)

 //读取本地文件
 let path = "/Users/HeYang/Desktop/file.txt"
 var findfileStr = String(contentsOfFile: path, encoding: NSUTF8StringEncoding, error: nil)
 var nsfindfileStr = NSString(string: findfileStr!)//转为NSString类型
 println(nsfindfileStr)

运行结果：