我正在写一些东西来获取某个程序的安装日期，但我似乎无法将返回的数字转换为奇怪的日期格式（yyyyMMdd）。我已经尝试将其转换为//
// Created by Joe Ruth on 1/10/16.
// Copyright © 2016 Joe Ruth. All rights reserved.
//
#import "SaveObjectUIDocument.h"
#import "SaveObject.h"
#define kArchiveKey @"SaveObjectXMLData"
@interface SaveObjectUIDocument ()
@property (nonatomic, strong) NSData * data;
@end
@implementation SaveObjectUIDocument;
@synthesize SaveObject = _SaveObject;
- (BOOL)loadFromContents:(id)contents ofType:(NSString *)typeName error:(NSError *__autoreleasing *)outError {
if ([contents length] > 0) {
NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:contents];
self.SaveObject = [unarchiver decodeObjectForKey:kArchiveKey];
[unarchiver finishDecoding];}
else {
self.SaveObject = [[SaveObject alloc] initWithData:nil];}
return YES;
}
- (id)contentsForType:(NSString *)typeName error:(NSError *__autoreleasing *)outError {
NSMutableData *data = [[NSMutableData alloc] init];
NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
[archiver encodeObject:self.SaveObject forKey:kArchiveKey];
[archiver finishEncoding];
return data;
}
- (void)handleError:(NSError *)error userInteractionPermitted:(BOOL)userInteractionPermitted {
NSLog(@"Error: %@ userInfo=%@", error.localizedDescription, error.userInfo);
[super handleError:error userInteractionPermitted:userInteractionPermitted];
}
@end
，但这会返回以下错误。
这可能是一个简单的解决方法，但这是我尚未遇到的问题。有人可以帮忙吗？
提前致谢！
[datetime]
$test = Get-WmiObject -Class Win32_Product | Where-Object {$_.Name -eq 'exampleProgram'} | select installdate
答案 0 :(得分：2)
鉴于你的日期＆＃34; 20160628＆＃34; 尝试：
[datetime]::ParseExact($Date,"yyyyMMdd",$null)
你得到：
Tuesday, June 28, 2016 12:00:00 AM
答案 1 :(得分：2)
您需要使用不变的cultureInfo和自定义格式将日期解析为变量：
$DateTimeVariable = [DateTime]::ParseExact("20160628", "yyyyMMdd", System.Globalization.CultureInfo]::InvariantCulture)
或
$DateTimeVariable = [DateTime]::ParseExact($test.installdate, "yyyyMMdd", System.Globalization.CultureInfo]::InvariantCulture)