查找当前时间是否在范围之间 [英] Find if current time is between a range

问题描述

如果日期介于某个范围之间，我可以找到如何获取，但我似乎无法在特定时间创建日期。

I can find how to get if a date is between a range, but I cant seem how to create a date at a specific time.

什么是查看[NSDate日期]是否在时间范围之间的最简单方法是？

What would be the simplest way to see if [NSDate date] is between a time range?

我想显示如下的个性化问候语：

I want to display a personalized greeting like the following:

12 pm - 4：59：9999 pm @下午好，foo

下午5点 - 晚上11：59：9999 @晚上好， foo

12 am - 11：59：9999 am @早上好，foo

12 pm - 4:59:9999 pm @"Good afternoon, foo"
5 pm - 11:59:9999 pm @"Good evening, foo"
12 am - 11:59:9999 am @"Good morning, foo"

推荐答案

是的，您可以使用 NSDateComponents 将以24小时格式返回小时。

Yes you can using NSDateComponents which will return the hour in the 24 hour format.

NSDateComponents *components = [[NSCalendar currentCalendar] components:NSHourCalendarUnit fromDate:[NSDate date]];
NSInteger hour = [components hour];

if(hour >= 0 && hour < 12)
    NSLog(@"Good morning, foo");
else if(hour >= 12 && hour < 17)
    NSLog(@"Good afternoon, foo");
else if(hour >= 17)
    NSLog(@"Good evening, foo");

Swift 3

let hour = Calendar.current.component(.hour, from: Date())

if hour >= 0 && hour < 12 {
    print("Good Morning")
} else if hour >= 12 && hour < 17 {
    print("Good Afternoon")
} else if hour >= 17 {
    print("Good Evening")
}

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