注意获取国际服时间需要导入三方库，Demo地址请点击下方链接
DEMO链接地址

工具类.h文件

#import <Foundation/Foundation.h>
#import "ios-ntp.h"
@interface HDateChange : NSObject
/**获取当前时间的 时间戳*/
+(long long)getNowTimestamp;
/**将某个时间戳转化成 时间*/
+(NSString *)timestampSwitchTime:(NSInteger)timestamp andFormatter:(NSString *)format;
/**将某个时间转化成 时间戳*/
+(NSInteger)timeSwitchTimestamp:(NSString *)formatTime andFormatter:(NSString *)format;
/** NSDate转时间戳*/
+(long long)getDateTimeTOMilliSeconds:(NSDate *)datetime;
/**时间戳转NSDate*/
+(NSDate *)timeValueTODate:(long)timeValue;
/**从国际服务器来获取网络时间*/
+ (NSDate *)getInternetDate;
@end

工具类.m文件

#import "HDateChange.h"

@implementation HDateChange
#pragma mark - 获取当前时间的 时间戳

+(long long)getNowTimestamp{
    
    
    
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    
    [formatter setDateStyle:NSDateFormatterMediumStyle];
    
    [formatter setTimeStyle:NSDateFormatterShortStyle];
    
    [formatter setDateFormat:@"YYYY-MM-dd HH:mm:ss"]; // ----------设置你想要的格式,hh与HH的区别:分别表示12小时制,24小时制
    
    //设置时区,这个对于时间的处理有时很重要
    
    NSTimeZone* timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];
    
    [formatter setTimeZone:timeZone];
    
    NSDate *datenow = [NSDate date];//现在时间
    
    
    
    NSLog(@"设备当前的时间:%@",[formatter stringFromDate:datenow]);
    
    //时间转时间戳的方法:
    
    NSTimeInterval interval = [datenow timeIntervalSince1970];
     long long totalMilliseconds = interval*1000 ;
    
//    NSInteger timeSp = [[NSNumber numberWithDouble:[datenow timeIntervalSince1970]] integerValue];
    
    
    
    NSLog(@"设备当前的时间戳:%ld",(long)totalMilliseconds); //时间戳的值
    
    
    
    return totalMilliseconds;
    
}


#pragma mark - 将某个时间转化成 时间戳

+(NSInteger)timeSwitchTimestamp:(NSString *)formatTime andFormatter:(NSString *)format{
    
    
    
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    
    [formatter setDateStyle:NSDateFormatterMediumStyle];
    
    [formatter setTimeStyle:NSDateFormatterShortStyle];
    
    [formatter setDateFormat:format]; //(@"YYYY-MM-dd hh:mm:ss") ----------设置你想要的格式,hh与HH的区别:分别表示12小时制,24小时制
    
    
    
    NSTimeZone* timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];
    
    [formatter setTimeZone:timeZone];
    
    
    
    NSDate* date = [formatter dateFromString:formatTime]; //------------将字符串按formatter转成nsdate
    
    //时间转时间戳的方法:
    
    NSInteger timeSp = [[NSNumber numberWithDouble:[date timeIntervalSince1970]] integerValue];
    
    
    
    NSLog(@"将某个时间转化成 时间戳&&&&&&&timeSp:%ld",(long)timeSp); //时间戳的值
    
    
    
    return timeSp;
    
}


#pragma mark - 将某个时间戳转化成 时间

+(NSString *)timestampSwitchTime:(NSInteger)timestamp andFormatter:(NSString *)format{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    
    [formatter setDateStyle:NSDateFormatterMediumStyle];
    
    [formatter setTimeStyle:NSDateFormatterShortStyle];
    
    [formatter setDateFormat:format]; // （@"YYYY-MM-dd hh:mm:ss"）----------设置你想要的格式,hh与HH的区别:分别表示12小时制,24小时制
    
    NSTimeZone *timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];
    
    [formatter setTimeZone:timeZone];
    
    NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:timestamp];
    
    NSLog(@"1296035591  = %@",confromTimesp);
    
    
    
    NSString *confromTimespStr = [formatter stringFromDate:confromTimesp];
    
    
    
    //NSLog(@"&&&&&&&confromTimespStr = : %@",confromTimespStr);
    
    
    
    return confromTimespStr;
    
}
+(long long)getDateTimeTOMilliSeconds:(NSDate *)datetime

{
    
    NSTimeInterval interval = [datetime timeIntervalSince1970];
    
    NSLog(@"转换的时间戳=%f",interval);
    
    long long totalMilliseconds = interval*1000 ;
    
    NSLog(@"totalMilliseconds=%llu",totalMilliseconds);
    
    return totalMilliseconds;
    
}
+(NSDate *)timeValueTODate:(long)timeValue{
    long date = timeValue / 1000;
   NSDate *dates = [NSDate dateWithTimeIntervalSince1970:date];
    return dates;
}
+ (NSDate *)getInternetDate
{

    NSDate *todayNet = [NSDate networkDate];

    return todayNet;
}
@end