analysisTime.m

- (NSString *)analysisTitle:(NSString *)theDate
{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSS"];
    //[formatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSS"];
    //yyyy-MM-dd HH:mm:ss
    NSDate *date = [NSDate date];
    date = [formatter dateFromString:theDate];
//    NSLog(@"Date:%@", [formatter stringFromDate:date]);
    
    NSDateFormatter *dateFormatter_s = [[NSDateFormatter alloc] init];
    [dateFormatter_s setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"zh_TW"]];
    
    
    NSDate* nowDate = [NSDate date];
    NSTimeInterval distanceBetweenDates = [nowDate timeIntervalSinceDate:date];
    //double secondsInMinute = 60;
    //NSInteger secondsBetweenDates = distanceBetweenDates / secondsInMinute;
    
    
    // 1 分鐘內, 60 秒內
    // 1 小時內, 60 分鐘內, 3600 秒內
    // 1 天內, 24 小時內, 3600 * 24 = 86400 秒內
    // 1 週內, 7 天內, 86400 * 7 = 604800 秒內
    // 1 月內, 30~31 天內 = 前一個月 另外判斷
    // 1 個月外
    
    
    if (distanceBetweenDates <= 0)
    {
        // 0 秒內
        // 剛剛
    }
    else if (distanceBetweenDates < 60)
    {
        // 1 分鐘內, 60 秒內
        return [[NSString alloc] initWithFormat:@"%d 秒前", (int)distanceBetweenDates];
    }
    else if (distanceBetweenDates < 3600)
    {
        // 1 小時內, 60 分鐘內, 3600 秒內
        return [[NSString alloc] initWithFormat:@"%d 分鐘前", (int)distanceBetweenDates / 60];
    }
    else if (distanceBetweenDates < 86400)
    {
        // 1 小時內, 60 分鐘內, 86400 秒內
        return [[NSString alloc] initWithFormat:@"%d 小時前", (int)distanceBetweenDates / 3600];
    }
    else if (distanceBetweenDates < 604800)
    {
        // 1 週內, 7 天內, 86400 * 7 = 604800 秒內
        [dateFormatter_s setDateFormat:@"EEEE aa h:mm"];
    }
    else
    {
        // 同一月
        [dateFormatter_s setDateFormat:@"yyyy/MM"];
        if ([[dateFormatter_s stringFromDate:date] isEqualToString:[dateFormatter_s stringFromDate:nowDate]]) {
            [dateFormatter_s setDateFormat:@"M'月'd'日' aa h:mm"];
        }
        else {
            // 同一年
            [dateFormatter_s setDateFormat:@"yyyy"];
            if ([[dateFormatter_s stringFromDate:date] isEqualToString:[dateFormatter_s stringFromDate:nowDate]]) {
                [dateFormatter_s setDateFormat:@"M'月'd'日'"];
            }
            else {
                [dateFormatter_s setDateFormat:@"y'年'M'月'd'日'"];
            }
        }
    }
    if ([[[UIDevice currentDevice] model] isEqualToString:@"iPhone Simulator"]) {
        //device is simulator
        NSLog(@"Date:%@", [dateFormatter_s stringFromDate:date]);
    }
    
    return [dateFormatter_s stringFromDate:date];
}