如何在ios中查看凌晨4点到下午4点和下午4点到凌晨4点之间的时间？ [关闭]答案

【问题标题】：How to check time in between 4am to 4pm and 4pm to 4am in ios? [closed]如何在ios中查看凌晨4点到下午4点和下午4点到凌晨4点之间的时间？ [关闭]
【发布时间】：2014-12-16 07:29:51
【问题描述】：

NSString *time = [self getCurrentDate];
NSLog(@"Current date :%@", time);
NSString *fromDate = @"10:00AM";
NSString *toDate = @"10:00PM";
NSDateFormatter *dateFormat = [[NSDateFormatter alloc]init];
[dateFormat setDateFormat:@"HH:mma"];
NSDate *fromTime = [dateFormat dateFromString:fromDate];
NSDate *toTime = [dateFormat dateFromString:toDate];
NSDate *nowTime = [dateFormat dateFromString:time];
NSComparisonResult result1 = [nowTime compare:fromTime];
NSComparisonResult result2 = [nowTime compare:toTime];

【问题讨论】：

传统的做法是在问题中包含一些实际文本，以便提出问题。我读过标题，但我不知道你在问什么。

标签： ios iphone

【解决方案1】：

NSDateComponents *calendarComponent = [[NSCalendar currentCalendar] components:NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit
                                                               fromDate:[NSDate date]];
NSInteger hour = [calendarComponent hour];
NSInteger minute = [calendarComponent minute];
NSInteger second = [calendarComponent second];

if (hour >= 4 && hour <= 16) { //16 means 12+4 = 4pm = 16hours
    // 4am to 4pm

    NSLog(@"4am to 4pm");

}
else{
    // 4pm to 4am

    NSLog(@"4pm to 4am");

}

fromDate: 应该是你需要测试的日期

【讨论】：

【解决方案2】：

NSDateFormatter *dateFormat = [[NSDateFormatter alloc]init];
[dateFormat setTimeZone:[NSTimeZone systemTimeZone]];
[dateFormat setDateFormat:@"hh:mma"];


NSDate *now = [NSDate date];      // Current Date
NSString *time = [dateFormat stringFromDate:now];
NSString *fromDate = @"10:00AM";
NSString *toDate = @"11:00PM";
NSDate *fromTime = [dateFormat dateFromString:fromDate];
NSDate *toTime = [dateFormat dateFromString:toDate];
NSDate *nowTime = [dateFormat dateFromString:time];
NSDateComponents *fromComponents = [[NSCalendar currentCalendar] components:NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit fromDate:fromTime];
NSDateComponents *toComponents = [[NSCalendar currentCalendar] components:NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit fromDate:fromTime];
NSInteger fromHour = [fromComponents hour]; 
NSInteger toHour = [toComponents hour];
if (fromHour >= 4 && toHour <= 16) { 
    NSLog(@"4am to 4pm");
}
else{       
    NSLog(@"4pm to 4am");
}

【讨论】：

【解决方案3】：

请试试这个：

    NSString *aStrStartDate = @"10:00AM";
    NSString *aStrEndDate = @"10:10PM";

    NSDateFormatter *aDateFormat = [[NSDateFormatter alloc]init];
    [aDateFormat setDateFormat:@"HH:mma"];
    NSDate *aDateStart = [aDateFormat dateFromString:aStrStartDate];
    NSDate *aDateEnd = [aDateFormat dateFromString:aStrEndDate];
    NSTimeInterval aTimeInterval = [aDateEnd timeIntervalSinceDate:aDateStart];
    NSLog(@"aTimeInterval: %f", aTimeInterval);

    NSDate *aDateTimer = [NSDate dateWithTimeIntervalSince1970:aTimeInterval];
    NSLog(@"%@",aDateTimer);
    NSDateFormatter *aDateFormat2 = [[NSDateFormatter alloc] init];
    [aDateFormat2 setDateFormat:@"HH:mm:ss"];
    [aDateFormat2 setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0.0]];

    NSString *aStrFinalTimeInterval = [aDateFormat2 stringFromDate:aDateTimer];
    NSLog(@"aStrFinalTimeInterval: %@",aStrFinalTimeInterval);

【讨论】：