如何以 PST 格式获取当前日期？

Question

我需要当前日期字符串。我已经尝试搜索 .我们目前从

得到的

    [NSDate currentDate];

采用 UTC。要么告诉我如何在 PST 中转换它，要么直接在 PST 中获取当前日期。

Answer 1

NSDate *date = [NSDate date];

NSDateFormatter *formatterUTC = [[NSDateFormatter alloc] init];
formatterUTC.timeZone = [NSTimeZone timeZoneWithName:@"UTC"];
[formatterUTC setDateFormat:@"MMM dd,yyyy, hh:mm a"];
NSString *dateString = [formatterUTC stringFromDate:date];

NSDate *dateFromString1 = [formatterUTC dateFromString:dateString];
NSDateFormatter *formatterPST = [[NSDateFormatter alloc] init];
[formatterPST setDateFormat:@"MMM dd,yyyy, hh:mm a"];

formatterPST.timeZone = [NSTimeZone timeZoneWithName:@"America/Los_Angeles"];

NSString *urdate = [formatterPST stringFromDate:dateFromString1];`

Answer 2

如果有人在 swift 中寻找解决方案：

public func getCurrentDateIn(timeZone: String) -> Date? {

// get a dateFormatter
let dateFormatter              = DateFormatter()
dateFormatter.dateFormat       = "MMM dd,yyyy, hh:mm a"
let currentDateString : String = dateFormatter.string(from: Date())

// get currentDate in string format
guard let currentDate          = dateFormatter.date(from: currentDateString) else { return nil }

// change the timezone of dateFormatter to timeZone
dateFormatter.timeZone         = TimeZone.init(abbreviation: timeZone)

// get current date in timeZone in string format from dateFormatter
let timeZoneDateString         = dateFormatter.string(from: currentDate)

// change the timeZone of dateFormatter to current otherwise it will apply conversion again.
dateFormatter.timeZone         = TimeZone.current
return dateFormatter.date(from: timeZoneDateString)

}

//测试用例

getCurrentDateIn(timeZone: "IST") "Apr 14, 2019 at 12:11 AM"

getCurrentDateIn(timeZone: "PST") "Apr 13, 2019 at 11:41 AM"

getCurrentDateIn(timeZone: "SGT") "Apr 14, 2019 at 2:41 AM"

如何以 PST 格式获取当前日期？

How to get Current Date date in PST format?

iphone

objective-c

nsdate

nsdateformatter

ios