Question

在我的应用程序中，我有一个字符串 - “比赛将从dd / mm / yyyy开始到dd / mm / yyyy”我希望两个日期分开，所以我需要一种方法将这些日期存储在两个不同的字符串中。 / p>

Answer 1

你可以用正则表达式（半公然改编自here）来做到这一点。

NSString *string                = @"contest will start from 10/11/2012 to 12/11/2012";

NSRegularExpression *regex      = [NSRegularExpression regularExpressionWithPattern:@"from (.*) to (.*)"
                                                                            options:0
                                                                              error:NULL];
NSTextCheckingResult *results   = [regex firstMatchInString:string
                                                    options:0
                                                      range:NSMakeRange(0, [string length])];
NSString *date1                 = [string substringWithRange:[results rangeAtIndex:1]];
NSString *date2                 = [string substringWithRange:[results rangeAtIndex:2]];

Answer 2

NSString *dateString = @"contest will start from dd/mm/yyyy to dd/mm/yyyy";
NSArray *components = [dateString componentsSeparatedByString:@"to"];

NSString *firstDate = [[components objectAtIndex:0] stringByReplacingOccurrencesOfString:@"contest will start from "];
NSString *secondDate = [[components objectAtIndex:1] stringByReplacingOccurrencesOfString:@" "];

Answer 3

    unsigned units = NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit;
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [calendar components:units fromDate: date];

NSInteger year = [components year];
NSInteger month = [components month];
NSInteger day = [components day];

NSString *together = [NSString stringWithFormat:@"%i - %i - %i", day, month, year];

将两个日期作为子字符串并将它们存储在单独的字符串中

3 个答案: