Question

如何将timezone1的日期转换为设备本地时区2的日期？

NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"YYYY-MM-dd HH:mm:ss"];
[dateFormat setTimeZone:[NSTimeZone timeZoneWithName:@"Asia/Jerusalem"]];
NSDate *date = [dateFormat dateFromString:timestamp];

then something like:
[dateFormat2 setTimeZone:[NSTimeZone localTimeZone]];
date2 = [dateFormat2 dateFromDate:date withOtherTimeZone:zone];

更新

我想我明白了。

//get source date from the server
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"YYYY-MM-dd HH:mm:ss"];
NSDate *sourceDate = [dateFormat dateFromString:timestamp];

//set timezones
NSTimeZone* sourceTimeZone = [NSTimeZone timeZoneWithName:@"Asia/Jerusalem"];
NSTimeZone* destinationTimeZone = [NSTimeZone systemTimeZone];

//calc time difference
NSInteger sourceGMTOffset = [sourceTimeZone secondsFromGMTForDate:sourceDate];
NSInteger destinationGMTOffset = [destinationTimeZone secondsFromGMTForDate:sourceDate];
NSTimeInterval interval = destinationGMTOffset - sourceGMTOffset;

//set current real date
NSDate* date = [[NSDate alloc] initWithTimeInterval:interval sinceDate:sourceDate];

可以吗？

Answer 1

首先关闭，时间就是时间。在这第二个，地球上的任何地方，它都是同一秒。不要再考虑时间格式了。不是。所有时间都应该是GMT，然后你可以根据TimeZone显示它。

Date *d = [NSDate date] ;
NSDateFormatter *df = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"YYYY-MM-dd HH:mm:ss Z"];
NSTimeZone *nyTimeZone = [NSTimeZone timeZoneWithAbbreviation:@"sometimeabbr."];
NSTimeZone *localTimeZone = [NSTimeZone systemTimeZone];
[df setTimezone: nyTimeZone];
NSLog(@"ny time is %@" , [df stringFromDate: d]);
[df setTimeZone: localTimeZone];
NSLog(@"local time is %@" , [df stringFromDate: d]);

如果给定一个字符串日期并需要转换，请创建NSDateFormatter以摄取字符串日期。确保设置时区。现在你有一个NSDate对象（NSDates中没有时区），你可以格式化成你想要的任何其他时区。

请为所有神圣的爱而感恩。将时间视为前进的秒数，将时区视为这些时区的格式。

Answer 2

这就是答案：

NSTimeZone* sourceTimeZone = [NSTimeZone timeZoneWithName:@"Asia/Jerusalem"];
NSTimeZone* destinationTimeZone = [NSTimeZone systemTimeZone];

//calc time difference
NSInteger sourceGMTOffset = [sourceTimeZone secondsFromGMTForDate:sourceDate];
NSInteger destinationGMTOffset = [destinationTimeZone secondsFromGMTForDate:sourceDate];
NSTimeInterval interval = destinationGMTOffset - sourceGMTOffset;

//set current real date
NSDate* date = [[NSDate alloc] initWithTimeInterval:interval sinceDate:sourceDate];

Answer 3

*不同的时区日期在swift中转换为本地时区日期。

let timeZone1 = NSTimeZone(name: timeZone1Name)
let localTimeZone = NSTimeZone.localTimeZone()

let timeZone1Interval = timeZone1?.secondsFromGMTForDate(timezone1Date!)
let deviceTimeZoneInterval = localTimeZone.secondsFromGMTForDate(timezone1Date!)

let timeInterval =  Double(timeZone1Interval! - deviceTimeZoneInterval)

let originalDate = NSDate(timeInterval: timeInterval, sinceDate: timezone1Date!)

let dateFormater : NSDateFormatter = NSDateFormatter()
    dateFormater.dateFormat = "YYYY-MM-dd HH:mm:ss Z"
NSLog("Converted date: \(dateFormater.stringFromDate(originalDate))")
let dateString = dateFormater.stringFromDate(originalDate)
let localTimeZoneDate = dateFormater.dateFromString(dateString)

*

将日期从时区转换为设备本地时区和日期

3 个答案: