如果您的目标是更新的操作系统版本(iOS 13.5+、OS X 10.15+),您可以使用RelativeDateTimeFormatter
:
let formatter = RelativeDateTimeFormatter()
formatter.dateTimeStyle = .named
for d in [-12600.0, -90000.0, -900.0, 13500.0] {
let str = formatter.localizedString(fromTimeInterval: d)
print("\(d): \(str)")
}
// Output
-12600.0: 3 hours ago
-90000.0: yesterday
-900.0: 15 minutes ago
13500.0: in 3 hours
对于较旧的操作系统版本,请使用从iOS 8开始提供的DateComponentFormatter
:
func format(duration: TimeInterval) -> String {
let formatter = DateComponentsFormatter()
formatter.allowedUnits = [.day, .hour, .minute, .second]
formatter.unitsStyle = .abbreviated
formatter.maximumUnitCount = 1
return formatter.string(from: duration)!
}
for d in [12600.0, 90000.0, 900.0, 13500.0] {
let str = format(duration: d)
print("\(d): \(str)")
}
这张照片是:
12600.0: 4h
90000.0: 1d
900.0: 15m
13500.0: 4h