小编典典

将UTC日期格式转换为本地nsdate

swift

我从服务器获取UTC时区的字符串日期,我需要将其转换为本地时区。

我的密码:

let utcTime = "2015-04-01T11:42:00.269Z"    
let dateFormatter = NSDateFormatter()
dateFormatter.timeZone = NSTimeZone(name: "UTC")
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
let date = dateFormatter.dateFromString(utcTime)
println("utc: \(utcTime), date: \(date)")

此打印-

utc:2015-04-01T11:42:00.269Z,日期:可选(2015-04-01 11:42:00 +0000)

如果我删除

dateFormatter.timeZone = NSTimeZone(name: "UTC")

它打印

utc:2015-04-01T11:42:00.269Z,日期:可选(2015-04-01 08:42:00 +0000)

我的当地时区是UTC +3,在第一个选项中,我获得UTC;在第二个选项中,我获得UTC -3

我应该得到

utc:2015-04-01T11:42:00.269Z,日期:可选(2015-04-01 14:42:00 +0000)

那么,如何将UTC日期格式转换为本地时间?


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2020-07-07

共1个答案

小编典典

在Objective-C中,以下内容对我有用:

// create dateFormatter with UTC time format
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss"]; 
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"UTC"]];
NSDate *date = [dateFormatter dateFromString:@"2015-04-01T11:42:00"]; // create date from string

// change to a readable time format and change to local time zone
[dateFormatter setDateFormat:@"EEE, MMM d, yyyy - h:mm a"];
[dateFormatter setTimeZone:[NSTimeZone localTimeZone]];
NSString *timestamp = [dateFormatter stringFromDate:date];

我方便使用这两个网站来转换不同的时间格式:http :
//www.w3.org/TR/NOTE-datetime

http://benscheirman.com/2010/06/dealing-with-dates-time-zones-in-
objective-c/

在Swift中,它将是:

// create dateFormatter with UTC time format
  let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
        dateFormatter.timeZone = NSTimeZone(name: "UTC") as TimeZone?
        let date = dateFormatter.date(from: "2015-04-01T11:42:00")// create   date from string

        // change to a readable time format and change to local time zone
        dateFormatter.dateFormat = "EEE, MMM d, yyyy - h:mm a"
        dateFormatter.timeZone = NSTimeZone.local
        let timeStamp = dateFormatter.string(from: date!)
2020-07-07