如何在 FSCalendar swift 3 中更改事件数组的背景颜色? [英] How to change background color of events array in FSCalendar swift 3?

问题描述

我有一个 2arrays 日期，想为特定事件设置不同的颜色，请帮助我如何做到这一点.

I'm having an 2arrays of dates and want to set different colors for particular event please help how to do this.

我正在尝试实现以下代码，但它不起作用，它返回 nil 没有颜色效果没有错误没有任何问题，请帮忙.

import UIKit
import FSCalendar

class myCalendarViewController: UIViewController,FSCalendarDelegate,FSCalendarDataSource,FSCalendarDelegateAppearance {

    var presentdays = [String]()
    var absentdays = [String]()

@IBOutlet weak var calendar: FSCalendar!

fileprivate let gregorian: Calendar = Calendar(identifier: .gregorian)
fileprivate lazy var dateFormatter1: DateFormatter = {
   let formatter = DateFormatter()
   formatter.dateFormat = "yyyy/MM/dd"
   return formatter
}()

override func viewDidLoad() {
      super.viewDidLoad()
}

func calendar(_ calendar: FSCalendar, appearance: FSCalendarAppearance,  titleDefaultColorFor date: Date) -> UIColor? {
         presentdays = ["2017-06-03",
                        "2017-06-06",
                        "2017-06-12",
                        "2017-06-25"]

         absentdays = ["2017-06-10",
                       "2017-06-18",
                       "2017-06-15",
                       "2017-06-16"]

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
}

}
   }

推荐答案

您的 DateFormatter 的 dateFormat 与数组中的字符串日期不匹配，因此将 dateFormat 更改为 yyyy-MM-dd 然后检查数组是否包含对象.

Your dateFormat of DateFormatter and string date in array doesn't match so changes the dateFormat to yyyy-MM-dd and then check array contains object or not.

fileprivate lazy var dateFormatter1: DateFormatter = {
    let formatter = DateFormatter()
    formatter.dateFormat = "yyyy-MM-dd"
    return formatter
}()

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