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-33, 76)
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：