从字典响应中更改 NSUserDefaults standardUserDefaults 的日期值

Question

我的方法接收到一个名为 responseDict 的字典，其中包含键，例如 id、status、name、phoneNumber、date等

responseDict[@"data"][@"value"][n]

（n 为数字）

如果我们的代码使用NSUserDefaults访问数据：

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

如何将 date MySQL 属性 2017-05-12 10:00:00 更改为 Dec 5, 2017 10 AM？

我尝试了以下方法，但它似乎并没有改变 UILabel 中的 defaults。

[defaults setInteger:[dictionary[@"id"] integerValue] forKey:@"ID"];
[defaults setObject:dictionary[@"status"] forKey:kNSUDoctorStatus];
[defaults setInteger:[dictionary[@"dur"] integerValue] forKey:@"duration"];
[defaults setObject:[NSString stringWithFormat:@"%@ some",dictionary[@"date"]] forKey:@"date"];
[defaults synchronize];

编辑：

UILabel

UILabel 似乎已被添加到视图中：

UILabel *vb = (UILabel *)[self.view viewWithTag:personMessageViewTag];

定义为：

#define personMessageViewTag 3001

博士Class

还有一个PersonDetailView class初始化：

PersonDetailView *personOnTheView;

并在方法中调用：

personOnTheView = [PersonDetailView sharedInstance];
personOnTheView.delegate = self;
[personOnTheView updateValues];
[self.view addSubview:personOnTheView];

方法： 这是 [personOnTheView updateValues]

的代码

-(void)updateValues{

    NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];

    NSString *strImageUrl = [NSString stringWithFormat:@"%@%@",baseUrlForXXHDPIImage,[ud objectForKey:kOnGoingBookingPersonProfileImageKey]];
    _doctorName.text = [ud objectForKey:kOnGoingBookingPersonNameKey];

    NSString *at = [NSString stringWithFormat:@"%@",flStrForObj([Helper getLocalDate:[ud objectForKey:kOnGoingBookingPersonBookingDate]])];

    _appoinmentTime.text = at;

     float rating = [[ud objectForKey:kOnGoingBookingPersonRatingKey] floatValue];

    _starRatingView.value = rating;

    [_profilepic sd_setImageWithURL:[NSURL URLWithString:[Helper removeWhiteSpaceFromURL:strImageUrl]]
                  placeholderImage:[UIImage imageNamed:@"doctor_image_thumbnail"]
                         completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL){
                         }];
}

问题：

每次我更改或修改：

[defaults setObject:dictionary[kPNPayloadAppoinmentTimeKey] forKey:kOnGoingBookingPersonBookingDate];

收件人：

[defaults setObject:[NSString stringWithFormat:@"%@ some",dictionary[@"date"]] forKey:@"date"];

或简单如：

[defaults setObject:@"Something here" forKey:@"date"];

显示空白

补充信息编辑：

[Helper getLocalDate]代码：

+(NSString *)getLocalDate:(NSString *)gmtdate {

    NSString *dateStr = gmtdate;
    NSDateFormatter *dateFormatter1 = [[NSDateFormatter alloc] init];
    [dateFormatter1 setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
    NSDate *destinationDate = [dateFormatter1 dateFromString:dateStr];

    NSDateFormatter *dateFormatters = [[NSDateFormatter alloc] init];
    [dateFormatters setDateFormat:@"MMM d, yyyy HH a"];
    dateStr = [dateFormatters stringFromDate: destinationDate];
    // NSLog(@"DateString : %@", dateStr);
    return dateStr;
}

Answer 1

如果日期字符串中有时区，借助此方法，您可以获得本地格式的日期

-(NSDate*)convertDateToLocal:(NSString *)strDate
{
    NSDateFormatter *localFormat = [[NSDateFormatter alloc] init];
    [localFormat setDateFormat:@"yyyy-MM-dd HH:mm:ss z"];
    NSDate *localDate = [localFormat dateFromString:strDate];
    return localDate;
}

如果您没有时区，这里有两种public日期转换方法

1) 来自字符串的日期，

+ (NSDate *)dateFromString:(NSString *)strSource inFormat:(NSString *)strTargetFormat
{
  NSDateFormatter *dtfFormatter = [[NSDateFormatter alloc] init];
  [dtfFormatter setDateFormat:strTargetFormat];

  return [dtfFormatter dateFromString:strSource];
}

2) 来自日期的字符串，

+ (NSString *)stringFromDate:(NSDate *)dtSourceDate inFormat:(NSString *)strTargetFormat
{
  NSDateFormatter *dtfFormatter = [[NSDateFormatter alloc] init];
  [dtfFormatter setDateFormat:strTargetFormat];

  if (dtSourceDate != nil)
    return [dtfFormatter stringFromDate:dtSourceDate];
  else
    return @"";
}

希望对您有所帮助。

从字典响应中更改 NSUserDefaults standardUserDefaults 的日期值

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