ios Swift 3 时区问题
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/39910001/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Swift 3 timezone issue
提问by AmrataB
It seems setDefaultTimeZonemethod is no longer available in NSTimeZone. Does someone know a substitute for this?
似乎setDefaultTimeZone方法在NSTimeZone. 有人知道这个的替代品吗？
In my AppDelegate.swift, I have:
在我的AppDelegate.swift，我有：
NSTimeZone.default = TimeZone(abbreviation: "BST")!
and it works as intended I guess because in all the other files, I get NSTimeZoneset to this value
我猜它按预期工作，因为在所有其他文件中，我都NSTimeZone设置为这个值
Now, In my Utils, I have this method:
现在，在我的实用程序中，我有这个方法：
static func getDate(_ dateStr: String) -> Date {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd"
// dateFormatter.timeZone = TimeZone(abbreviation: "GMT")
let date = dateFormatter.date(from: dateStr)!
return date
}
So, lets say, I give it input 2016-10-07, it gives me back 2016-10-06 23:00. Why? It gets fixed if you uncomment the line in the above code. I don't want to use this line everywhere.
所以，让我们说，我给它输入2016-10-07，它给我回2016-10-06 23:00。为什么？如果您取消注释上述代码中的行，它就会得到修复。我不想到处都使用这条线。
For example, in some other part of my project, I have used CVCalendar. It provides a function for getting convertedDate like so
例如，在我项目的其他部分，我使用了CVCalendar. 它提供了一个像这样获取convertedDate的函数
func didSelectDayView(_ dayView: DayView, animationDidFinish: Bool) {
selectedDay = dayView
selectedDate = dayView.date.convertedDate()!
}
The same thing as before is happening here too...that is I click on 2016-10-08and it selectedDatehere becomes 2016-10-07 23:00.
这里也发生了和以前一样的事情......那是我点击它2016-10-08，它selectedDate在这里变成2016-10-07 23:00.
And the NSTimeZone.Defaultprints Europe/Londoneverywhere.
而且到处都是NSTimeZone.Default印记Europe/London。
Does anyone have any idea why is this happening?
有谁知道为什么会这样？
采纳答案by Jitendra Modi
let locale = NSTimeZone.init(abbreviation: "BST")
NSTimeZone.default = locale as! TimeZone
Try this
尝试这个
回答by Nirav D
Try like this.
像这样尝试。
TimeZone.ReferenceType.default = TimeZone(abbreviation: "BST")!
Edit:I have used this TimeZonewith DateFormatterand get the correct BSTtime with date.
编辑：我已经使用这个TimeZone与DateFormatter和得到正确的BST时间和日期。
TimeZone.ReferenceType.default = TimeZone(abbreviation: "BST")!
let formatter = DateFormatter()
formatter.timeZone = TimeZone.ReferenceType.default
formatter.dateFormat = "yyyy-MM-dd HH:mm"
let strDate = formatter.string(from: Date())
print(strDate)
If you want to set defaultTimeZonefor NSTimeZoneobject then in Swift 3 you can set like this.
如果你想设置defaultTimeZone的NSTimeZone对象，然后在斯威夫特3，你可以这样设置。
NSTimeZone.default = TimeZone(abbreviation: "BST")!
回答by Wolverine
If you are using calendar then,
如果您正在使用日历，那么
// * create calendar object *
// * 创建日历对象 *
var calendar = NSCalendar.current
// * define calendar components to use as well Timezone to UTC *
// * 定义日历组件也使用时区到 UTC *
let unitFlags = Set<Calendar.Component>([.hour, .year, .minute])
calendar.timeZone = TimeZone(identifier: "UTC")!
/// Returns a time zone initialized with a given identifier. /// /// An example identifier is "America/Los_Angeles". /// /// If `identifier` is an unknown identifier, then returns `nil`. public init?(identifier: String)The geopolitical region identifier that identifies the time zone.
public var identifier: String { get }
/// Returns a time zone initialized with a given identifier. /// /// An example identifier is "America/Los_Angeles". /// /// If `identifier` is an unknown identifier, then returns `nil`. public init?(identifier: String)标识时区的地缘区域标识符。
公共变量标识符：字符串{获取}
Note: If you want to set the date formatter timezone, you can follow the above approach like this :
注意：如果要设置日期格式化程序时区，可以按照上述方法进行操作：
dateFormatter.timeZone = TimeZone(identifier: "UTC")!
