NSDate设置为前一天 [英] NSDate being set to the day before

问题描述

重要的更新：你悬停在一个NSDATE与你的鼠标脱机将转换NSDate到你设置在Mac上的本地时区，但如果你做一个NSLOG，你会注意到NSDate正在使用时区，你

Important update: Of you hover over a NSDATE with your mouse the degugger will convert the NSDate to your local timezone you have set on you Mac, but if you do a NSLOG you will notice that the NSDate is using the timezone that you assigned to the its respective formatter.

我需要从传递日期创建一个NSDate，但目前它设置为我传入前一天：

I require a NSDate to be created from the date I pass in, but currently it is set to the the day before I pass in:

 NSString *dateStr = @"2015-08-09";

NSDateFormatter *myformatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy-MM-dd"];
NSDate *date = [formatter dateFromString:dateStr];

上面的代码返回：NSDate设置为'2015-08-08 12:00:00 + 0000'

The code above returns: an NSDate set to '2015-08-08 12:00:00 +0000'

我需要一个NSDate对象设置为我传入的datStr。

I need an NSDate object set to the datStr I pass in.

推荐答案

也许，从这里：

This perhaps, from this:

使用NSDateFormatter将NSDate转换为NSString，使用不包含GMT时间修饰符的TimeZone

'z'小写的命名时区，即PST和大写'Z'-0800

leave the 'z' lowercase for named timezone, i.e. PST and uppercase 'Z' for -0800

NSDateFormatter *format = [[NSDateFormatter alloc] init];
[format setDateFormat:@"MMMM dd, yyyy (EEEE) HH:mm:ss z Z"];
NSDate *now = [NSDate date];
NSString *nsstr = [format stringFromDate:now];

此外，您的日期应该更加健壮，如果您想在当天通过正在传入，它是一天了，然后只是添加一天。问题，似乎是日期返回正确的日期，这是最后一天的结束，添加1秒或一毫秒，它可能会得到纠正，或者只是黑客攻击这个，并添加1天的日子是聪明！有时你只需要添加1天来修复和继续。

Also, you date should be more robust, like if you want to pass in the current day that your are passing in and it's one day off, then just add a day. The problem, it seems is that the date is returning the correct date which is the end of the last day, add 1 second or a millisecond and it'll probably be corrected, or just hack attack this and add 1 day to the days you are passing in. Be smart! Sometimes you just have to add 1 day to fix stuff and move on.

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