我正在尝试让图标数组显示在我的天气应用中，但似乎无法获取UIImage来显示它们

Question

This is my code so far, with no errors, but it is not picking the dates from the 5 day forecast. What is wrong in this code?

//: to display the 5 day date array from the open weather API

enter code here var temperatureArray: Array = Array() var dayNumber = 0 var readingNumber = 0 if let jsonObj = try? JSONSerialization.jsonObject(with: data, options: .allowFragments) as? NSDictionary { if let mainArray = jsonObj!.value(forKey: "list") as? NSArray { for dict in mainArray { if let mainDictionary = (dict as! NSDictionary).value(forKey: "main") as? NSDictionary { if let temperature = mainDictionary.value(forKey: "temp_max") as? Double {

                                if readingNumber == 0 {
                          temperatureArray.append(temperature)
                      } else if temperature > temperatureArray[dayNumber] {
                            temperatureArray[dayNumber] = temperature



                                }

                            } else {
                   print("Error: unable to find temperature in dictionary")
                            }
                        } else {
                            print("Error: unable to find main dictionary")
                        }
                        readingNumber += 1
                        if readingNumber == 8 {
                            readingNumber = 0
                            dayNumber += 1


                        }
                        var dateArray: Array<String> = Array()
                        var dayNumber = 0
                        var readingNumber = 0

         if let weatherArray = jsonObj!.value(forKey: "list") as? NSArray {
                            for dict in weatherArray {

if let weatherDictionary = (dict as! NSDictionary).value(forKey: "list") as? NSDictionary { if let date = weatherDictionary.value(forKey: "dt_txt") as? String {

                                    if readingNumber == 0 {
                                  dateArray.append(date)
                                 } else if date > dateArray[dayNumber] {
                                    dateArray[dayNumber] = date
                                        }

                                    }

                                } else {
                  print("Error: unable to find date in dictionary")
                                }


                                readingNumber += 1
                                if readingNumber == 8 {
                                    readingNumber = 0
                                    dayNumber += 1


                                }
                            }
                        }
                    }
                }

            }





                    func fixTempForDisplay(temp: Double) -> String {
                        let temperature = round(temp)
               let temperatureString = String(format: "%.0f", temperature)
                        return temperatureString
                    }




                    DispatchQueue.main.async {

self.weatherLabel1.text = "Today: (fixTempForDisplay(temp: temperatureArray[0]))°C" self.weatherLabel2.text = "Tomorrow: (fixTempForDisplay(temp: temperatureArray[1]))°C" self.weatherLabel3.text = "Day 3: (fixTempForDisplay(temp: temperatureArray[2]))°C" self.weatherLabel4.text = "Day 4: (fixTempForDisplay(temp: temperatureArray[3]))°C" self.weatherLabel5.text = "Day 5: (fixTempForDisplay(temp: temperatureArray[4]))°C"

        func formatDate(date: NSDate) -> String {
            let dateFormatter = DateFormatter()
            dateFormatter.dateStyle = .medium
            return dateFormatter.string(from: date as Date)


    }



                self.dateLabel1.text = ": \(formatDate(date: dateArray[0]))"
                self.dateLabel2.text = ": \(formatDate(date: dateArray[1]))"
                self.dateLabel3.text = ": \(formatDate(date: dateArray[2]))"
                self.dateLabel4.text = ": \(formatDate(date: dateArray[3]))"
                self.dateLabel5.text = ": \(formatDate(date: dateArray[4]))"


            }




                }

                    }





    dataTask.resume()

}

}

Answer 1

It looks to me like you need to change your icon array to contain strings

var iconArray: Array<String> = Array()

and then when parsing the json text

if let icon = weatherDictionary.value(forKey: "icon") as? String {

and finally

self.iconImage1.image = UIImage(named: iconArray[0])
self.iconImage2.image = UIImage(named: iconArray[1])  

Of course the below comparison won't work anymore when icon is a string but I don't understand any of this if/else clasue so I don't know what to replace it with

if readingNumber == 0 {
  iconArray.append(icon)
} else if icon > iconArray[dayNumber] { //This won't work now. 
  iconArray[dayNumber] = icon
}