iOS开发——NSDate

1、获取当前系统时间，毫秒级

- (void)viewDidLoad {

    [super viewDidLoad];

    

    NSString *currentTime = [self getCurrentTime];

    NSLog(@"%@",currentTime);

}

 

- (NSString *)getCurrentTime{

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

    [formatter setDateFormat:@"YYYY-MM-dd hh:mm:ss:SSS"];

    NSString *date = [formatter stringFromDate:[NSDate date]];

    return date;

}