将Firebase Firestore时间戳转换为日期(快速)? [英] Convert Firebase Firestore Timestamp to Date (Swift)?
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问题描述
我在Firestore字段中保存了一个日期,作为时间戳,我想将其转换为Swift中的日期:
I have a date saved in a Firestore field as a timestamp that I want to convert to a Date in Swift:
June 19,2018 at 7:20:21 PM UTC-4
我尝试了以下操作,但出现错误:
I tried the following but I get an error:
let date = Date(timeIntervalSince1970: postTimestamp as! TimeInterval)
错误:
Could not cast value of type 'FIRTimestamp' (0x104fa8b98) to 'NSNumber'
我想转换为Date的原因是为了可以使用此Date扩展名模仿您在Instagram帖子上看到的时间戳:
The reason why I want to convert to Date is so that I can use this Date extension to mimic timestamps you see on Instagram posts:
extension Date {
func timeAgoDisplay() -> String {
let secondsAgo = Int(Date().timeIntervalSince(self))
let minute = 60
let hour = 60 * minute
let day = 24 * hour
let week = 7 * day
if secondsAgo < minute {
return "\(secondsAgo) seconds ago"
} else if secondsAgo < hour {
return "\(secondsAgo / minute) minutes ago"
} else if secondsAgo < day {
return "\(secondsAgo / hour) hours ago"
} else if secondsAgo < week {
return "\(secondsAgo / day) days ago"
}
return "\(secondsAgo / week) weeks ago"
}
}
推荐答案
可以:
let date = postTimestamp.dateValue()
或者您可以这样做:
let date = Date(timeIntervalSince1970: postTimestamp.seconds)
请参见时间戳参考文档.
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