swift怎么实现在线天气预

本篇内容主要讲解"swift怎么实现在线天气预"，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习"swift怎么实现在线天气预"吧!

实现功能简单，但知识点用到很多，比如微信搜索地理位置等。

//  ViewController.swift//  WeatherApp// 文启领航培训// bjflexedu.com// qq：376610000import UIKitimport CoreLocationclass ViewController: UIViewController,CLLocationManagerDelegate {        @IBOutlet var cityName : UILabel        @IBOutlet var icon : UIImageView        @IBOutlet var tempTxt : UILabel        @IBOutlet var busy : UIActivityIndicatorView        @IBOutlet var messageInfo : UILabel        let locationManage:CLLocationManager = CLLocationManager()        override func viewDidLoad() {        super.viewDidLoad()       busy.startAnimating()               let img = UIImage(named: "background.jpg")      self.view.backgroundColor = UIColor(patternImage: img)                locationManage.delegate = self      locationManage.desiredAccuracy = kCLLocationAccuracyBest    locationManage.requestAlwaysAuthorization()    locationManage.startUpdatingLocation()                    }    func locationManager(manager: CLLocationManager!, didUpdateLocations locations: AnyObject[]!){              var location =  locations[locations.count-1] as CLLocation        if location.horizontalAccuracy > 0{           let latitude = location.coordinate.latitude           let longitude = location.coordinate.longitude                        self.updateWeatherData(latitude,longitude:longitude)                      locationManage.stopUpdatingLocation()                                }                   }    func updateWeatherData(latitude:CLLocationDegrees,longitude:CLLocationDegrees){          let url = "http://api.openweathermap.org/data/2.5/weather"       let params = ["lat":latitude,"lon":longitude,"cnt":0]      let manage = AFHTTPRequestOperationManager()             let success = {        (operation:AFHTTPRequestOperation!, response:AnyObject!) -> Void in                //println(response)                self.busy.stopAnimating()        self.busy.hidden = true        self.messageInfo.text = nil                        //name        let jsonResult:NSDictionary =  response as NSDictionary                self.cityName.text = jsonResult["name"]? as String        var tempNum:Double        if let tempValue =   jsonResult["main"]?["temp"]? as? Double{          tempNum = round(tempValue - 273.15)           self.tempTxt.text = "\(tempNum) "                    }                        let idCon = (jsonResult["weather"]? as NSArray)[0]?["id"]? as? Int                        let nowTime = NSDate().timeIntervalSince1970        let  sunrise = jsonResult["sys"]?["sunrise"]? as? Double        let  sunset = jsonResult["sys"]?["sunset"]? as? Double        var nightTime = false//true 表示黑夜；false表示白天        if nowTime < sunrise || nowTime > sunset{            nightTime = true         }else{            nightTime = false        }                self.updateIcon(idCon!,nightTime:nightTime)                }        let failure = {            (operation:AFHTTPRequestOperation!, error:NSError!) -> Void in            println("\(error)")                        self.messageInfo.text = "远程数据取不到"                }                    manage.GET(url, parameters: params, success: success, failure: failure)                                            }            func updateIcon(condition:Int,nightTime:Bool){                if (condition < 300) {            if nightTime {                self.icon.p_w_picpath = UIImage(named: "tstorm1_night")            } else {                self.icon.p_w_picpath = UIImage(named: "tstorm1")            }        }            // Drizzle        else if (condition < 500) {            self.icon.p_w_picpath = UIImage(named: "light_rain")        }            // Rain / Freezing rain / Shower rain        else if (condition < 600) {            self.icon.p_w_picpath = UIImage(named: "shower3")        }            // Snow        else if (condition < 700) {            self.icon.p_w_picpath = UIImage(named: "snow4")        }            // Fog / Mist / Haze / etc.        else if (condition < 771) {            if nightTime {                self.icon.p_w_picpath = UIImage(named: "fog_night")            } else {                self.icon.p_w_picpath = UIImage(named: "fog")            }        }            // Tornado / Squalls        else if (condition < 800) {            self.icon.p_w_picpath = UIImage(named: "tstorm3")        }            // Sky is clear        else if (condition == 800) {            if (nightTime){                self.icon.p_w_picpath = UIImage(named: "sunny_night") // sunny night?            }            else {                self.icon.p_w_picpath = UIImage(named: "sunny")            }        }            // few / scattered / broken clouds        else if (condition < 804) {            if (nightTime){                self.icon.p_w_picpath = UIImage(named: "cloudy2_night")            }            else{                self.icon.p_w_picpath = UIImage(named: "cloudy2")            }        }            // overcast clouds        else if (condition == 804) {            self.icon.p_w_picpath = UIImage(named: "overcast")        }            // Extreme        else if ((condition >= 900 && condition < 903) || (condition > 904 && condition < 1000)) {            self.icon.p_w_picpath = UIImage(named: "tstorm3")        }            // Cold        else if (condition == 903) {            self.icon.p_w_picpath = UIImage(named: "snow5")        }            // Hot        else if (condition == 904) {            self.icon.p_w_picpath = UIImage(named: "sunny")        }            // Weather condition is not available        else {            self.icon.p_w_picpath = UIImage(named: "dunno")        }                                    }            func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!){    self.messageInfo.text = "地理位置信息找不到"        println("地理位置信息找不到\(error)")            }    override func didReceiveMemoryWarning() {        super.didReceiveMemoryWarning()        // Dispose of any resources that can be recreated.    }}

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