Trying to Reload FSCalendar with JSon data but it crashes - swift3

Question

this question is linked with the my previous account's question.
How to make API call for this web service to fetch array of present and absent dates separately in swift?
code
import UIKit
import FSCalendar
class AttendenceViewController : UIViewController, FSCalendarDelegate, FSCalendarDataSource, FSCalendarDelegateAppearance
{
#IBOutlet weak var calendar: FSCalendar!
var presentdays : Array = [String]()
var absentdays : Array = [String]()
fileprivate let gregorian: Calendar = Calendar(identifier: .gregorian)
fileprivate lazy var dateFormatter1: DateFormatter = {
let formatter = DateFormatter()
formatter.dateFormat = "yyyy-MM-dd"
return formatter
}()
fileprivate lazy var dateFormatter2: DateFormatter = {
let formatter2 = DateFormatter()
formatter2.dateFormat = "dd"
return formatter2
}()
override func viewDidLoad() {
super.viewDidLoad()
self.getdateFromJSON()
}
func calendar(_ calendar: FSCalendar, appearance: FSCalendarAppearance, fillDefaultColorFor date: Date) -> UIColor? {
let datestring2 : String = dateFormatter1.string(from: date)
if presentdays.contains(datestring2)
{
return UIColor.green
}
else if absentdays.contains(datestring2)
{
return UIColor.red
}
else
{
return nil
}
}
func getdateFromJSON()
{
let url = NSURL(string: "ezschoolportalapi.azurewebsites.net/api/Student/AttendanceDetails?schoolid=1&studentid=2&month=6&year=2017")
let request = NSMutableURLRequest(url: url! as URL)
let task = URLSession.shared.dataTask(with: request as URLRequest) { (data, response, error)
in
guard error == nil && data != nil else
{
print("Error:",error)
return
}
let httpstatus = response as? HTTPURLResponse
if httpstatus?.statusCode == 200
{
if data?.count != 0
{
if let responseJSON = (try? JSONSerialization.jsonObject(with: data!, options: .allowFragments)) as? [String:Any],
let presentdetails = responseJSON["Present"] as? [[String:Any]],
let Absentdetails = responseJSON["Absent"] as? [[String:Any]] {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
self.presentdays = presentdetails.flatMap { dateFormatter.date(from: $0["Date"] as! String) }.flatMap {
self.dateFormatter2.string(from:$0)
}
self.absentdays = Absentdetails.flatMap { dateFormatter.date(from: $0["Date"] as! String) }.flatMap { self.dateFormatter2.string(from:$0) }
DispatchQueue.main.async
{
self.calendar.reloadData()
}
}
}
else
{
print("No data got from URL")
}
}
else{
print("error httpstatus code is :",httpstatus?.statusCode)
}
}
task.resume()
}
}
I'm attaching the error log here please help thanks in advance.
ERROR LOG
2017-06-17 10:23:50.671 ezSchool[1848:24475]
-[UICachedDeviceWhiteColor unsignedLongLongValue]: unrecognized selector sent to instance 0x608000059ec0 2017-06-17 10:23:50.672
ezSchool[1848:24475] Failed to set (placeholderType) user defined
inspected property on (FSCalendar): -[UICachedDeviceWhiteColor
unsignedLongLongValue]: unrecognized selector sent to instance
0x608000059ec0 2017-06-17 10:23:50.672 ezSchool[1848:24475]
-[UICachedDeviceWhiteColor unsignedLongLongValue]: unrecognized selector sent to instance 0x608000059ec0 2017-06-17 10:23:50.672
ezSchool[1848:24475] Failed to set (firstWeekday) user defined
inspected property on (FSCalendar): -[UICachedDeviceWhiteColor
unsignedLongLongValue]: unrecognized selector sent to instance
0x608000059ec0 2017-06-17 10:23:50.672 ezSchool[1848:24475]
-[UICachedDeviceWhiteColor doubleValue]: unrecognized selector sent to instance 0x608000059ec0 2017-06-17 10:23:50.673 ezSchool[1848:24475]
Failed to set (headerHeight) user defined inspected property on
(FSCalendar): -[UICachedDeviceWhiteColor doubleValue]: unrecognized
selector sent to instance 0x608000059ec0 2017-06-17 10:23:50.673
ezSchool[1848:24475] -[UICachedDeviceWhiteColor doubleValue]:
unrecognized selector sent to instance 0x608000059ec0 2017-06-17
10:23:50.673 ezSchool[1848:24475] Failed to set (headerTitleTextSize)
user defined inspected property on (FSCalendar):
-[UICachedDeviceWhiteColor doubleValue]: unrecognized selector sent to instance 0x608000059ec0

Answer 1

Replace the function getdateFromJSON() with
func getdateFromJSON()
{
let url = NSURL(string: "http://ezschoolportalapi.azurewebsites.net/api/Student/AttendanceDetails?schoolid=1&studentid=2&month=6&year=2017")
let request = NSMutableURLRequest(url: url! as URL)
let task = URLSession.shared.dataTask(with: request as URLRequest) { (data, response, error)
in
guard error == nil && data != nil else
{
print("Error:",error ?? "error")
return
}
let httpstatus = response as? HTTPURLResponse
if httpstatus?.statusCode == 200
{
if data?.count != 0
{
if let responseJSON = (try? JSONSerialization.jsonObject(with: data!, options: .allowFragments)) as? [String:Any],
let presentdetails = responseJSON["Present"] as? [[String:Any]],
let Absentdetails = responseJSON["Absent"] as? [[String:Any]] {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
self.presentdays = presentdetails.flatMap { dateFormatter.date(from: $0["Date"] as! String) }.flatMap {
self.dateFormatter1.string(from:$0)
}
self.absentdays = Absentdetails.flatMap { dateFormatter.date(from: $0["Date"] as! String) }.flatMap { self.dateFormatter1.string(from:$0) }
DispatchQueue.main.async
{
self.calendar.reloadData()
}
}
}
else
{
print("No data got from URL")
}
}
else{
print("error httpstatus code is :",httpstatus?.statusCode ?? "5")
}
}
task.resume()
}
Please see whether the below attached image is your desired output