如何修复错误“未设置开始日期”？

问题描述

在常规日历中保存事件时，有时不会保存事件。显示错误："Failed to save event with error: Error Domain = EKErrorDomain Code = 2" No start date has been set. "UserInfo = {NSLocalizedDescription = No start date has been set.}"，虽然日期确定正确

func saveTaskInCalendar() {
        let eventStore : EKEventStore = EKEventStore()
        eventStore.requestAccess(to: .event) { (granted,error) in
            if (granted) && (error == nil) {
                let event: EKEvent = EKEvent(eventStore: eventStore)
                dispatchQueue.main.async {
                    event.title = "Test"
                    event.startDate = Date()
                    event.endDate = Date()
                }
                event.calendar = eventStore.defaultCalendarForNewEvents
                do {
                    try eventStore.save(event,span: .thisEvent)
                } catch let error as NSError {
                    print("Failed to save event with error : \(error)")
                }
            }
            else {
                print("Failed to save event with error : \(String(describing: error)) or access not granted")
            }
        }
    }

我该如何解决这个错误？

解决方法

问题在于您将 EKEvent 的属性设置在调度异步块中，而将偶数保存在异步块之外。这可能会导致在您已经尝试保存事件之后执行属性设置。

要么删除 DispatchQueue.main.async 调用，因为它无论如何都不是必需的，或者也将保存代码也放在 dispatch async 中。

let event: EKEvent = EKEvent(eventStore: eventStore)
event.title = "Test"
event.startDate = Date()
event.endDate = Date()
event.calendar = eventStore.defaultCalendarForNewEvents
do {
    try eventStore.save(event,span: .thisEvent)
}

或

DispatchQueue.main.async {
    let event: EKEvent = EKEvent(eventStore: eventStore)
    event.title = "Test"
    event.startDate = Date()
    event.endDate = Date()
    event.calendar = eventStore.defaultCalendarForNewEvents
    do {
        try eventStore.save(event,span: .thisEvent)
    }
...