Calling web service error in iPhone 6 - ios

Question

I'm facing a weird behavior in my IOs application, let me comment you a bit about it:
General method called from the UI
func GetSensorList(){
dispatch_async(dispatch_get_global_queue(priority, 0)) {
self.sensors = Sensor.GenerateSensorList()
dispatch_async(dispatch_get_main_queue()) {
self.collectionView?.reloadData()
}
}
}
I have this method that call a rest Web Service:
static func GenerateSensorList() -> [Sensor]{
var sensores = [Sensor]()
let manager: AppManager = AppManager.manager
var userData: UserData? = nil
do{
userData = try manager.GetUserData()
if let userDataAux = userData {
manager.SaveSharedUserData(userDataAux)
if(userDataAux.weatherSettings!.weatherCity != nil){
var unit = "imperial"
if(userDataAux.weatherSettings!.tempFormat! == "C"){
unit = "metric"
}
let s = userDataAux.weatherSettings!.weatherCity!.stringByReplacingOccurrencesOfString(" ", withString: "#")
let weather = try manager.GetWeatherData(s, metric: unit)
let temperatureInt = Int(weather.weatherMain!.temp!)
let description = weather.weatherItem![0].description
let temp = "Temp: " + String(temperatureInt) + "°" + (userData!.weatherSettings!.tempFormat!)
let sensorAux = Sensor(image: weather.image, label1: description , label2:temp)
sensores.append(sensorAux)
}
}
let deviceData = try? manager.RetrieveDeviceDataObject()
if(deviceData != nil){
if(deviceData!?.DeviceDataItems != nil){
let deviceDataItems = deviceData!?.DeviceDataItems!
for(var i = 0; i < deviceDataItems?.count; i++){
let catId = deviceDataItems![i].CategoryId
let devId = deviceDataItems![i].DeviceItemId
switch catId!{
case 12: break
case 16:
let devItem = try manager.GetDeviceHumiditySensorItemById(devId!)
let photo1 = UIImage(named: "ic_devices")!
var humidityValue = ""
if(devItem.DeviceItemHumiditySensorHumidity != nil){
humidityValue = (devItem.DeviceItemHumiditySensorHumidity)!
}else{
humidityValue = "0"
}
let sensorAux = Sensor(image: photo1, label1: devItem.DeviceItemName , label2: ( humidityValue + "%"))
sensores.append(sensorAux)
case 17:
let devItem = try manager.GetDeviceTemperatureSensorItemById(devId!)
let photo1 = UIImage(named: "ic_devices")!
let sensorAux = Sensor(image: photo1, label1: devItem.DeviceItemName , label2: ((devItem.DeviceItemTemperatureSensorTemperature)! + "°" + (userData!.weatherSettings!.tempFormat!)))
sensores.append(sensorAux)
case 18:
let devItem = try manager.GetDeviceLightSensorItemById(devId!)
let photo1 = UIImage(named: "ic_devices")!
let sensorAux = Sensor(image: photo1, label1: devItem.DeviceItemName , label2: ((devItem.DeviceItemLightSensorLight)!))
sensores.append(sensorAux)
case 21:
let devItem = try manager.GetDevicePowerMeterItemById(devId!)
let photo1 = UIImage(named: "ic_devices")!
let sensorAux = Sensor(image: photo1, label1: devItem.DeviceItemName , label2: ((devItem.DeviceItemPowerMeterWatts)! + "Watts"))
sensores.append(sensorAux)
default: break
}
}
}
}
}
catch{
sensores = [Sensor]()
}
return sensores
}
In the line:
let weather = try manager.GetWeatherData(s, metric: unit)
I face the following issue: When I'm using the iPad emulator the method works fine, but when I'm using an iPhone 6 emulator I found that the data is different and the application crash.
I checked and the iPhone and the iPad is running the same version of IOs (9.2), the url is exactly the same, but the NSDATA object that I got are different.
GetWeatherData code:
func GetWeatherData(cityName: String, metric: String) throws -> WeatherCondition{
do{
var weather = WeatherCondition()
let url = SERVICEURL + "/GetWeather/" + cityName + "/" + metric
let data = try ExecuteRequestServiceHeader(url, mmsAuth: nil, mmsAuthSig: nil, mmsSession: nil)
if let dataAux = data{
let json = try NSJSONSerialization.JSONObjectWithData(dataAux, options: .MutableLeaves) as! NSDictionary
let jsonleave = json["GetWeatherResult"] as? String
if let jsonLeaveAux = jsonleave{
weather = WeatherCondition.JsonToObject(jsonLeaveAux)
let iconVar = weather.weatherItem![0].icon
let urlIcon = SERVICEURL + "/GetWeatherIcon/"+iconVar!
let dataIcon = try ExecuteRequestService(urlIcon)
if let dataIconAux = dataIcon{
let jsonIcon = try NSJSONSerialization.JSONObjectWithData(dataIconAux, options: .MutableLeaves) as! NSDictionary
if let jsonleaveIcon = jsonIcon["GetWeatherIconResult"] as? NSArray{
var byteArray = [UInt8]()
for (var i = 0; i < jsonleaveIcon.count; i++){
byteArray.append(UInt8(String(jsonleaveIcon[i]))!)
}
let imData = NSData(bytes: byteArray, length: (byteArray.count))
let image = UIImage(data: imData)
weather.image = image
}
}else{
throw AppManagerError.ErrorAccessingService(url: "Getting Weather data")
}
}else{
throw AppManagerError.ErrorAccessingService(url: "Getting Weather data")
}
}else{
throw AppManagerError.ErrorAccessingService(url: "Getting Weather data")
}
return weather
}catch{
throw AppManagerError.ErrorAccessingService(url: "Getting Weather data")
}
}
The application throw an exception in this line:
let json = try NSJSONSerialization.JSONObjectWithData(dataAux, options: .MutableLeaves) as! NSDictionary
Exception Track:
caught: Error Domain=NSCocoaErrorDomain Code=3840 "JSON text did not
start with array or object and option to allow fragments not set."
UserInfo={NSDebugDescription=JSON text did not start with array or
object and option to allow fragments not set.}
I will appreciate any help on this

Answer 1

This was getting to complicated to write in a comment, so I will put this in answers.
First off, I am a bit confused by this part of your code:
do{
var weather = WeatherCondition()
let url = SERVICEURL + "/GetWeather/" + cityName + "/" + metric
let data = try ExecuteRequestServiceHeader(url, mmsAuth: nil, mmsAuthSig: nil, mmsSession: nil)
if let dataAux = data{
let json = try NSJSONSerialization.JSONObjectWithData(dataAux, options: .MutableLeaves) as! NSDictionary
You look like are you trying to create the dataAux variable based on trying to serialize dataAux not data. I would assume you want to call the JSONObjectWithData method on data. Not sure why you would see a difference on the different platforms, but that could be part of the problem.
In addition, it is worth calling the JSONObjectWithData method using .AllowFragments to see if this helps. I would also suggest taking doing something like this to see what the data actually looks like before you try to serialize it. At the very least it might help you trouble shoot the difference between the two platforms.
print(NSString(data: data, encoding: NSUTF8StringEncoding))