根据经纬度获取天气信息
let manager = AFHTTPRequestOperationManager()
let url = "http://api.openweathermap.org/data/2.5/weather"
let params = ["lat":latitude, "lon":longitude, "cnt": 0]
manager.GET(url, parameters: params, success: { (operation: AFHTTPRequestOperation!, respinseObejct: AnyObject!) in
println("JSON: " + respinseObejct.description!)
}, failure: {(operation: AFHTTPRequestOperation!, error: NSError!) in
println("Error" + error.localizedDescription)
})