ios - 在特定日期显示特定文件的建议逻辑

Question

我正在开发的应用程序将在其中包含一年中每个工作日的每日消息。我将每个工作日的 PDF 文件放在名为“星期一”、“星期二”、“星期三”、“星期四”、“星期五”的文件夹中。每个 PDF 都被命名为 0.pdf、1.pdf 等，以便我可以增加一个计数。下面是我的显示代码，但我遇到的问题是每次加载 View 时它都会增加计数。在与前一个 PDF 不同的日期之前不前进到下一个 PDF 的好方法是什么？

- (void)viewDidLoad {
    NSDateFormatter* day = [[NSDateFormatter alloc] init];
    [day setDateFormat: @"EEEE"];
    NSLog(@"the day is: %@", [day stringFromDate:[NSDate date]]);
    NSString *dayString = [day stringFromDate:[NSDate date]];
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    NSInteger whichWeekMonday = [defaults integerForKey:@"DevoWeekMonday"];
    NSInteger whichWeekTuesday = [defaults integerForKey:@"DevoWeekTuesday"];
    NSInteger whichWeekWednesday = [defaults integerForKey:@"DevoWeekWednesday"];
    NSInteger whichWeekThursday = [defaults integerForKey:@"DevoWeekThursday"];
    NSInteger whichWeekFriday = [defaults integerForKey:@"DevoWeekFriday"];
    NSLog(@"Integer Thursday: %ld", (long)whichWeekThursday);
    NSString *whichWeekMondayString = [[NSNumber numberWithInteger:whichWeekMonday] stringValue];
    NSString *whichWeekTuesdayString = [[NSNumber numberWithInteger:whichWeekTuesday] stringValue];
    NSString *whichWeekWednesdayString = [[NSNumber numberWithInteger:whichWeekWednesday] stringValue];
    NSString *whichWeekThursdayString = [[NSNumber numberWithInteger:whichWeekThursday] stringValue];
    NSLog(@"Thursday string: %@", whichWeekThursdayString);
    NSString *whichWeekFridayString = [[NSNumber numberWithInteger:whichWeekFriday] stringValue];

    
    
    
    if ([dayString isEqualToString:@"Monday"]) {
        NSString *Documents = [[NSBundle mainBundle] pathForResource:whichWeekMondayString ofType:@"pdf" inDirectory:@"Mondays"];

       
        NSURL *url = [NSURL fileURLWithPath:Documents];
        NSLog(@"%@",url);
        NSURLRequest *request = [NSURLRequest requestWithURL:url];
        [savedweb loadRequest:request];
        NSInteger updatedNumberMonday = whichWeekMonday + 1;
        [defaults setInteger:updatedNumberMonday forKey:@"DevoWeekMonday"];
        [defaults synchronize];
    }
    if ([dayString isEqualToString:@"Tuesday"]) {
        NSString *Documents = [[NSBundle mainBundle] pathForResource:whichWeekTuesdayString ofType:@"pdf" inDirectory:@"Tuesdays"];

       
        NSURL *url = [NSURL fileURLWithPath:Documents];
        NSLog(@"%@",url);
        NSURLRequest *request = [NSURLRequest requestWithURL:url];
        [savedweb loadRequest:request];
        NSInteger updatedNumberTuesday = whichWeekTuesday +1;
        [defaults setInteger:updatedNumberTuesday forKey:@"DevoWeekTuesday"];
        [defaults synchronize];
        
    }
    if ([dayString isEqualToString:@"Wednesday"]) {
        NSString *Documents = [[NSBundle mainBundle] pathForResource:whichWeekWednesdayString ofType:@"pdf" inDirectory:@"Wednesdays"];

       
        NSURL *url = [NSURL fileURLWithPath:Documents];
        NSLog(@"%@",url);
        NSURLRequest *request = [NSURLRequest requestWithURL:url];
        [savedweb loadRequest:request];
        NSInteger updatedNumberWednesday = whichWeekWednesday +1;
        [defaults setInteger:updatedNumberWednesday forKey:@"DevoWeekWednesday"];
        [defaults synchronize];
        
    }
    if ([dayString isEqualToString:@"Thursday"]) {
        
        // perform some action
        NSString *Documents = [[NSBundle mainBundle] pathForResource:whichWeekThursdayString ofType:@"pdf" inDirectory:@"Thursdays"];

        NSLog(@"File: %@", Documents);
        NSURL *url = [NSURL fileURLWithPath:Documents];
        NSLog(@"%@",url);
        NSURLRequest *request = [NSURLRequest requestWithURL:url];
        [savedweb loadRequest:request];
        
        
       
        NSInteger updatedNumberThursday = whichWeekThursday +1;
        [defaults setInteger:updatedNumberThursday forKey:@"DevoWeekThursday"];
        [defaults synchronize];
        
        
    }
    if ([dayString isEqualToString:@"Friday"]) {
        NSString *Documents = [[NSBundle mainBundle] pathForResource:whichWeekFridayString ofType:@"pdf" inDirectory:@"Fridays"];

       
        NSURL *url = [NSURL fileURLWithPath:Documents];
        NSLog(@"%@",url);
        NSURLRequest *request = [NSURLRequest requestWithURL:url];
        [savedweb loadRequest:request];
        NSInteger updatedNumberFriday = whichWeekFriday +1;
        [defaults setInteger:updatedNumberFriday forKey:@"DevoWeekFriday"];
        [defaults synchronize];
        
    }
    if ([dayString isEqualToString:@"Saturday"]) {
        
    }
    if ([dayString isEqualToString:@"Sunday"]) {
        
    }
    
  // NSString *Documents = [[NSBundle mainBundle] pathForResource:selectedCountry ofType:@"pdf" inDirectory:@"thepdfpowerpoints"];

    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
}

Answer 1

编辑
基于您当前的问题，即在每次加载 View 时始终不增加计数:
我相信让计数数字保持动态更好。因此，您将使用日期字符串来确定哪个文件夹，然后使用以下内容根据一年中的一周动态找出哪个编号的 pdf:

NSDateComponents weekofyearComponents = [[NSCalendar(calendarIdentifier: NSCalendarIdentifierISO8601)] components:(NSCalendarUnitWeekOfYear ) fromDate: [NSDate date]];
NSInteger whichWeekOfYear = weekofyearComponents.weekOfYear

原答案
我可以看到几种方法可以做到。
一种方法就像您建议的那样，将当天的日期提供给 PDF 的那一天。这是 getting the day of the year in iOS swift 的链接.
另一种方法是获取 week of the year number (1-52) 然后 get the day of the week number因此，您可以按一年中的一周在目录中组织 pdf，然后在其中包含一周中每一天的消息。
我的最后一条评论是，对于 iOS 应用程序中的当天消息，PDF 听起来有点沉重或笨拙。一个文本文件或一些轻量级数据库或一些缓存可能就足够了，这些缓存通过 webrequest 更新以刷新和存储当天的当前和接下来的几条消息。我绝对缺乏上下文，所以我不会否认 PDF 可能正是您所需要的这一事实。