那些遇到过的问题

如何在Objective-C中格式化日期,类似于jquery.timeago库？

bar*_*oon 19 iphone objective-c nsdate ios

我有一个表格单元格中显示的项目,其中一部分是过去的日期/时间戳.

在Objective-C中,如何以与网络上的jquery.timeago插件相同的方式完成格式化？

也就是说,接受日期并输出如下内容:

  • '现在'
  • '2分钟前'
  • '24天前'
  • '一个月前'

我看到这里有一个NSDate扩展类,其中包含dateWithDaysBeforeNow,dateWithMinutesBeforeNow等方法,但如果有一个已经完成此操作的库,我将使用它.

编辑:除此之外,如果某人编写了一个方法(接受一个日期,返回一个字符串)来实现这一点,无论是使用这个链接的扩展库还是其他方法,我都会给他们答案.

EDIT 2 Bounty适用于任何可以在Objective-C中编写模糊日期算法的人.

Sac*_*ram 14

创建静态类方法:

+ (NSString *)stringForTimeIntervalSinceCreated:(NSDate *)dateTime serverTime:(NSDate *)serverDateTime{
    NSInteger MinInterval;
    NSInteger HourInterval;
    NSInteger DayInterval;
    NSInteger DayModules;   

    NSInteger interval = abs((NSInteger)[dateTime timeIntervalSinceDate:serverDateTime]);
    if(interval >= 86400)    
    {
        DayInterval  = interval/86400;
        DayModules = interval%86400;
        if(DayModules!=0)
        {
            if(DayModules>=3600){
                //HourInterval=DayModules/3600;
                return [NSString stringWithFormat:@"%i days", DayInterval];
            }
            else {
                if(DayModules>=60){
                    //MinInterval=DayModules/60;
                    return [NSString stringWithFormat:@"%i days", DayInterval];
                }
                else {
                    return [NSString stringWithFormat:@"%i days", DayInterval];
                }
            }
        }
        else 
        {
        return [NSString stringWithFormat:@"%i days", DayInterval];
        }

    }

    else{

        if(interval>=3600)
        {

            HourInterval= interval/3600;
            return [NSString stringWithFormat:@"%i hours", HourInterval];

        }

        else if(interval>=60){

            MinInterval = interval/60;

            return [NSString stringWithFormat:@"%i minutes", MinInterval];
        }
        else{
            return [NSString stringWithFormat:@"%i Sec", interval];
        }

    }

}
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ipm*_*mcc 6

好吧,我昨晚无法入睡 - 猜我会咬人.这是jQuery的timeAgo的line-for-line端口,其中包含原始JavaScript源代码以供参考.使用标准的ObjC/AppKit机制进行用户默认和本地化.显然忽略了与Web相关的东西,比如更新现有的DOM元素.还省略了可以在设置中放置函数的机制,因为这是一种特定于JavaScript的.无需再费周折:

头文件:

//
//  NSDate+JQTimeAgoAdditions.h
//  JQTimeAgo
//

#import <Foundation/Foundation.h>

@interface NSDate (JQTimeAgoAdditions)

- (NSString*)timeAgo;

@end

extern NSString* const kJQTimeAgoAllowFutureKey;
extern NSString* const kJQTimeAgoStringsPrefixAgoKey;
extern NSString* const kJQTimeAgoStringsPrefixFromNowKey;
extern NSString* const kJQTimeAgoStringsSuffixAgoKey;
extern NSString* const kJQTimeAgoStringsSuffixFromNowKey;
extern NSString* const kJQTimeAgoStringsSecondsKey;
extern NSString* const kJQTimeAgoStringsMinuteKey;
extern NSString* const kJQTimeAgoStringsMinutesKey;
extern NSString* const kJQTimeAgoStringsHourKey;
extern NSString* const kJQTimeAgoStringsHoursKey;
extern NSString* const kJQTimeAgoStringsDayKey;
extern NSString* const kJQTimeAgoStringsDaysKey;
extern NSString* const kJQTimeAgoStringsMonthKey;
extern NSString* const kJQTimeAgoStringsMonthsKey;
extern NSString* const kJQTimeAgoStringsYearKey;
extern NSString* const kJQTimeAgoStringsYearsKey;
extern NSString* const kJQTimeAgoStringsNumbersKey;
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和实施文件:

//
//  NSDate+JQTimeAgoAdditions.m
//  JQTimeAgo
//

#import "NSDate+JQTimeAgoAdditions.h"

@implementation NSDate (JQTimeAgoAdditions)

- (NSString*)timeAgo
{
    NSTimeInterval distanceMillis = -1000.0 * [self timeIntervalSinceNow];
//        inWords: function(distanceMillis) {
//            var $l = this.settings.strings;
    NSUserDefaults* defs = [NSUserDefaults standardUserDefaults];
//            var prefix = $l.prefixAgo;
    NSString* prefix = [defs stringForKey: kJQTimeAgoStringsPrefixAgoKey];
//            var suffix = $l.suffixAgo;
    NSString* suffix = [defs stringForKey: kJQTimeAgoStringsSuffixAgoKey];
//            if (this.settings.allowFuture) {
    if ([defs boolForKey: kJQTimeAgoAllowFutureKey])
    {
//                if (distanceMillis < 0) {
        if (distanceMillis < 0.0) 
        {
//                    prefix = $l.prefixFromNow;
            prefix = [defs stringForKey: kJQTimeAgoStringsPrefixFromNowKey];
//                    suffix = $l.suffixFromNow;
            suffix = [defs stringForKey: kJQTimeAgoStringsSuffixFromNowKey];
//                }
        }
//                distanceMillis = Math.abs(distanceMillis);
        distanceMillis = fabs(distanceMillis);            
//            }
    }
//            
//            var seconds = distanceMillis / 1000;
    const double seconds = distanceMillis / 1000.0;
//            var minutes = seconds / 60;
    const double minutes = seconds / 60.0;
//            var hours = minutes / 60;
    const double hours = minutes / 60.0;
//            var days = hours / 24;
    const double days = hours / 24.0;
//            var years = days / 365;
    const double years = days / 365.0;
//            
//            function substitute(stringOrFunction, number) { ... }
    // Use stringWithFormat, etc.
//            
//            var words = seconds < 45 && substitute($l.seconds, Math.round(seconds)) ||
    NSString* words = nil;
    if (seconds < 45)
        words = [[defs stringForKey: kJQTimeAgoStringsSecondsKey] stringByReplacingOccurrencesOfString: @"%d" withString: [NSString stringWithFormat: @"%d", (int)round(seconds)]];
//            seconds < 90 && substitute($l.minute, 1) ||
    else if (seconds < 90)
        words = [[defs stringForKey: kJQTimeAgoStringsMinuteKey] stringByReplacingOccurrencesOfString: @"%d" withString: [NSString stringWithFormat: @"%d", (int)1]];

//            minutes < 45 && substitute($l.minutes, Math.round(minutes)) ||
    else if (minutes < 45)
        words = [[defs stringForKey: kJQTimeAgoStringsMinutesKey] stringByReplacingOccurrencesOfString: @"%d" withString: [NSString stringWithFormat: @"%d", (int)round(minutes)]];

//            minutes < 90 && substitute($l.hour, 1) ||
    else if (minutes < 90)
        words = [[defs stringForKey: kJQTimeAgoStringsHourKey] stringByReplacingOccurrencesOfString: @"%d" withString: [NSString stringWithFormat: @"%d", (int)1]];

//            hours < 24 && substitute($l.hours, Math.round(hours)) ||
    else if (hours < 24)
        words = [[defs stringForKey: kJQTimeAgoStringsHoursKey] stringByReplacingOccurrencesOfString: @"%d" withString: [NSString stringWithFormat: @"%d", (int)round(hours)]];

//            hours < 48 && substitute($l.day, 1) ||
    else if (hours < 48)
        words = [[defs stringForKey: kJQTimeAgoStringsDayKey] stringByReplacingOccurrencesOfString: @"%d" withString: [NSString stringWithFormat: @"%d", (int)1]];
//            days < 30 && substitute($l.days, Math.floor(days)) ||
    else if (days < 30)
        words = [[defs stringForKey: kJQTimeAgoStringsDaysKey] stringByReplacingOccurrencesOfString: @"%d" withString: [NSString stringWithFormat: @"%d", (int)floor(days)]];

//            days < 60 && substitute($l.month, 1) ||
    else if (days < 60)
        words = [[defs stringForKey: kJQTimeAgoStringsMonthKey] stringByReplacingOccurrencesOfString: @"%d" withString: [NSString stringWithFormat: @"%d", (int)1]];

//            days < 365 && substitute($l.months, Math.floor(days / 30)) ||
    else if (days < 365)
        words = [[defs stringForKey: kJQTimeAgoStringsMonthsKey] stringByReplacingOccurrencesOfString: @"%d" withString: [NSString stringWithFormat: @"%d", (int)floor(days/30.0)]];

//            years < 2 && substitute($l.year, 1) ||
    else if (years < 2)
        words = [[defs stringForKey: kJQTimeAgoStringsYearKey] stringByReplacingOccurrencesOfString: @"%d" withString: [NSString stringWithFormat: @"%d", (int)1]];
//            substitute($l.years, Math.floor(years));
    else
        words = [[defs stringForKey: kJQTimeAgoStringsYearsKey] stringByReplacingOccurrencesOfString: @"%d" withString: [NSString stringWithFormat: @"%d", (int)floor(years)]];
//            
//            return $.trim([prefix, words, suffix].join(" "));
    NSString* retVal = [[NSString stringWithFormat: @"%@ %@ %@", 
                         (prefix ? prefix : @""),
                         (words ? words : @""),
                         (suffix ? suffix : @"")] stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet]];
    return retVal;
//        },
}

// Load settings
+ (void)load
{    
    // Frameworks are guaranteed to be loaded by now so we can use NSDictionary, etc...
    // See here for details: http://www.mikeash.com/pyblog/friday-qa-2009-05-22-objective-c-class-loading-and-initialization.html
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        @autoreleasepool 
        {
            NSDictionary* settings = [NSDictionary dictionaryWithObjectsAndKeys:
                                      [NSNumber numberWithBool: NO], kJQTimeAgoAllowFutureKey,
                                      NSLocalizedStringWithDefaultValue(kJQTimeAgoStringsPrefixAgoKey, nil, [NSBundle mainBundle], @" ", @"kJQTimeAgoStringsPrefixAgoKey"), kJQTimeAgoStringsPrefixAgoKey,
                                      NSLocalizedStringWithDefaultValue(kJQTimeAgoStringsPrefixFromNowKey, nil, [NSBundle mainBundle], @" ", @"kJQTimeAgoStringsPrefixFromNowKey"), kJQTimeAgoStringsPrefixFromNowKey,
                                      NSLocalizedStringWithDefaultValue(kJQTimeAgoStringsSuffixAgoKey, nil, [NSBundle mainBundle], @"ago", @"kJQTimeAgoStringsSuffixAgoKey"), kJQTimeAgoStringsSuffixAgoKey,
                                      NSLocalizedStringWithDefaultValue(kJQTimeAgoStringsSuffixFromNowKey, nil, [NSBundle mainBundle], @"from now", @"kJQTimeAgoStringsSuffixFromNowKey"), kJQTimeAgoStringsSuffixFromNowKey,
                                      NSLocalizedStringWithDefaultValue(kJQTimeAgoStringsSecondsKey, nil, [NSBundle mainBundle], @"less than a minute", @"kJQTimeAgoStringsSecondsKey"), kJQTimeAgoStringsSecondsKey,
                                      NSLocalizedStringWithDefaultValue(kJQTimeAgoStringsMinuteKey, nil, [NSBundle mainBundle], @"about a minute", @"kJQTimeAgoStringsMinuteKey"), kJQTimeAgoStringsMinuteKey,
                                      NSLocalizedStringWithDefaultValue(kJQTimeAgoStringsMinutesKey, nil, [NSBundle mainBundle], @"%d minutes", @"kJQTimeAgoStringsMinutesKey"), kJQTimeAgoStringsMinutesKey,
                                      NSLocalizedStringWithDefaultValue(kJQTimeAgoStringsHourKey, nil, [NSBundle mainBundle], @"about an hour", @"kJQTimeAgoStringsHourKey"), kJQTimeAgoStringsHourKey,
                                      NSLocalizedStringWithDefaultValue(kJQTimeAgoStringsHoursKey, nil, [NSBundle mainBundle], @"about %d hours", @"kJQTimeAgoStringsHoursKey"), kJQTimeAgoStringsHoursKey,
                                      NSLocalizedStringWithDefaultValue(kJQTimeAgoStringsDayKey, nil, [NSBundle mainBundle], @"about a day", @"kJQTimeAgoStringsDayKey"), kJQTimeAgoStringsDayKey,
                                      NSLocalizedStringWithDefaultValue(kJQTimeAgoStringsDaysKey, nil, [NSBundle mainBundle], @"%d days", @"kJQTimeAgoStringsDaysKey"), kJQTimeAgoStringsDaysKey,
                                      NSLocalizedStringWithDefaultValue(kJQTimeAgoStringsMonthKey, nil, [NSBundle mainBundle], @"about a month", @"kJQTimeAgoStringsMonthKey"), kJQTimeAgoStringsMonthKey,
                                      NSLocalizedStringWithDefaultValue(kJQTimeAgoStringsMonthsKey, nil, [NSBundle mainBundle], @"%d months", @"kJQTimeAgoStringsMonthsKey"), kJQTimeAgoStringsMonthsKey,
                                      NSLocalizedStringWithDefaultValue(kJQTimeAgoStringsYearKey, nil, [NSBundle mainBundle], @"about a year", @"kJQTimeAgoStringsYearKey"), kJQTimeAgoStringsYearKey,
                                      NSLocalizedStringWithDefaultValue(kJQTimeAgoStringsYearsKey, nil, [NSBundle mainBundle], @"%d years", @"kJQTimeAgoStringsYearsKey"), kJQTimeAgoStringsYearsKey,
                                      nil];


            [[NSUserDefaults standardUserDefaults] registerDefaults: settings];
        }
    });
}

@end

NSString* const kJQTimeAgoAllowFutureKey = @"kJQTimeAgoAllowFutureKey";
NSString* const kJQTimeAgoStringsPrefixAgoKey = @"kJQTimeAgoStringsPrefixAgoKey";
NSString* const kJQTimeAgoStringsPrefixFromNowKey = @"kJQTimeAgoStringsPrefixFromNowKey";
NSString* const kJQTimeAgoStringsSuffixAgoKey = @"kJQTimeAgoStringsSuffixAgoKey";
NSString* const kJQTimeAgoStringsSuffixFromNowKey = @"kJQTimeAgoStringsSuffixFromNowKey";
NSString* const kJQTimeAgoStringsSecondsKey = @"kJQTimeAgoStringsSecondsKey";
NSString* const kJQTimeAgoStringsMinuteKey = @"kJQTimeAgoStringsMinuteKey";
NSString* const kJQTimeAgoStringsMinutesKey = @"kJQTimeAgoStringsMinutesKey";
NSString* const kJQTimeAgoStringsHourKey = @"kJQTimeAgoStringsHourKey";
NSString* const kJQTimeAgoStringsHoursKey = @"kJQTimeAgoStringsHoursKey";
NSString* const kJQTimeAgoStringsDayKey = @"kJQTimeAgoStringsDayKey";
NSString* const kJQTimeAgoStringsDaysKey = @"kJQTimeAgoStringsDaysKey";
NSString* const kJQTimeAgoStringsMonthKey = @"kJQTimeAgoStringsMonthKey";
NSString* const kJQTimeAgoStringsMonthsKey = @"kJQTimeAgoStringsMonthsKey";
NSString* const kJQTimeAgoStringsYearKey = @"kJQTimeAgoStringsYearKey";
NSString* const kJQTimeAgoStringsYearsKey = @"kJQTimeAgoStringsYearsKey";
NSString* const kJQTimeAgoStringsNumbersKey = @"kJQTimeAgoStringsNumbersKey";
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