[IOS开发教程] NSDate 日期操作工具类

//

// main.m

// OC05-task-06

//

// Created by Xin the Great on 15-1-26.

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// Copyright (c) 2015年 Xin the Great. All rights reserved.

//

#import <Foundation/Foundation.h>

int main(int argc, const charchar * argv[]) {

@autoreleasepool {

// insert code here...

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//////////////////////NSDate --- 日期//////////////////////

//获取当前系统的时间 标准时间 GMT 格林尼治时间

NSDate *date = [NSDate date];

NSLog(@"date is %@", date);

NSDate *date1 = [[NSDate alloc] init];

NSLog(@"date1 is %@", date1);

//获取时间戳 以秒为单位

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NSTimeInterval time1970 = [date timeIntervalSince1970];

NSLog(@"time1970 is %.1f", time1970);

NSTimeInterval time2001 = [date timeIntervalSinceReferenceDate];

NSLog(@"time2001 is %.1f", time2001);

NSTimeInterval time = [date timeIntervalSinceNow];

NSLog(@"time is %.1f", time);

//获取昨天的时间

NSTimeInterval second = 224 * 660 * 60;

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NSDate *yesterDayDate = [[NSDate alloc] initWithTimeIntervalSinceNow:-second];

NSLog(@"yesterDayDate is %@",yesterDayDate);

//获取明天的时间

NSDate *tomorrowDayDate = [NSDate dateWithTimeInterval:second sinceDate:[NSDate date]];

NSLog(@"tomorrowDayDate is %@", tomorrowDayDate);

//获得未来的某一个时间

NSDate *future = [NSDate distantFuture];

NSLog(@"future is %@", future);

//获得古代的某一个时间

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NSDate *past = [NSDate distantPast];

NSLog(@"past is %@", past);

//日期的比较

// BOOL isTure = [date isEqualToDate:date1];

// NSLog(@"isTure is %d", isTure);

//返回两个时间比较早的那个时间

NSDate *earlierDate = [tomorrowDayDate earlierDate:future];

NSLog(@"earlierDate is %@", earlierDate);

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//返回两个时间比较晚的那个时间

NSDate *later = [tomorrowDayDate laterDate:future];

NSLog(@"later is %@", later);

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//将时间戳转换成字符串

NSString *str = @"123456789";

NSTimeInterval second2 = [str doubleValue];

NSDate *date3 = [NSDate dateWithTimeIntervalSince1970:second2];

NSLog(@"date3 is %@", date3);

//格式化日期类

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NSDateFormatter *df = [[NSDateFormatter alloc] init];

[df setDateFormat:@"yyyy年MM月dd日 HH小时mm分钟ss秒 ZZZZ"];

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//将日期按照格式化日期类转换为字符串

NSString *str2 = [df stringFromDate:date3];

NSLog(@"str2 is %@", str2);

//通过字符串转换为date

NSDate *date4 = [df dateFromString:str2];

NSLog(@"date4 is %@", date4);

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}

return 0;

}