从 [NSDate date] 获取日期减少几个小时 [英] Getting date from [NSDate date] off by a few hours

问题描述

我正在使用

NSDate *date = [NSDate date];

获取日期，但我得到的日期相差 2 小时.

for getting the date, but the date I get is off by 2 hours.

推荐答案

NSDate 对象没有时区.它们代表了一个绝对的时刻.但是，当您询问其 description(例如，通过使用 NSLog() 打印)时，它必须选择一个时区.最合理的默认"选择是 GMT.如果您自己不在格林威治标准时间，则日期似乎不正确，与您自己的偏移量有关.

NSDate objects don't have time zones. They represent an absolute moment in time. However, when you ask one for its description (by printing it with NSLog(), e.g.), it has to pick a time zone. The most reasonable "default" choice is GMT. If you're not in GMT yourself, the date will seem to be incorrect, by the amount of your own offset.

您应该始终使用 NSDateFormatter 来创建用于显示的字符串.格式化程序的时区应设置为您的时区，这是默认设置.

You should always use an NSDateFormatter to create a string for display. The formatter's timezone should be set to yours, which is the default.

这篇关于从 [NSDate date] 获取日期减少几个小时的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！