如何在今天午夜获取 NSDate 对象?

本文介绍了如何在今天午夜获取 NSDate 对象?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

获取表示当天午夜的 NSDate 对象的最有效方法是什么?

What is the most efficient way to obtain an NSDate object that represents midnight of the current day?

推荐答案

试试这个:

NSDate *const date = NSDate.date; NSCalendar *const calendar = NSCalendar.currentCalendar; NSCalendarUnit const preservedComponents = (NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay); NSDateComponents *const components = [calendar components:preservedComponents fromDate:date]; NSDate *const normalizedDate = [calendar dateFromComponents:components];