iOS开发-你想要的时间格式

1.正确获取中国时区的时间

    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    dateFormatter.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"];
    dateFormatter.dateFormat = @"yyyy:mm:dd HH:mm:ss";
    return [dateFormatter stringFromDate:[NSDate date]];

2.打印年月日，时分秒以及星期

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    NSString *str1 = [self format: @"yyyy-MM-dd HH:mm:ss" dateTime:[NSDate date]];
    
    NSString *str2 = [self format: @"MM月dd日(cccc) HH:mm:ss" dateTime:[NSDate date]];
    
    NSLog(@"%@==%@",str1,str2);
}

- (NSString *)format:(NSString *)formatter dateTime:(NSDate *)dateTime{
    if (dateTime == nil) {
        return @" ";
    }
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    dateFormatter.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"];
    dateFormatter.dateFormat = formatter;
    return [dateFormatter stringFromDate:dateTime];
}

把时间转换成一天中指定的时间段

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
//    NSString *str1 = [self format: @"yyyy-MM-dd HH:mm:ss" dateTime:[NSDate date]];
//    
//    NSString *str2 = [self format: @"MM月dd日(cccc) HH:mm:ss" dateTime:[NSDate date]];
//    
//    NSLog(@"%@==%@",str1,str2);
    NSLog(@"%@",[self translateDateWithDate:[NSDate date]]);
}

// 把时间转换成一天中指定的时间段
- (NSString *)translateDateWithDate:(NSDate *)date
{
    /*
     0 - 6  凌晨
     6 - 11：30 早上
     11：31 - 12：30 中午
     12：31 - 18：00 下午
     18：01 - 24：00 晚上
     */
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    dateFormatter.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"];
    dateFormatter.dateFormat = @"HH:mm";
    NSString *dateStr = [dateFormatter stringFromDate:date];
    
    NSString *hoursMinInteger = [dateStr stringByReplacingOccurrencesOfString:@":" withString:@""];
    NSInteger hours = hoursMinInteger.integerValue;
    
    NSString *returnDate = nil;
    if (hours > 0 && hours < 600) {
        returnDate = [@"凌晨" stringByAppendingString:dateStr];
    }else if (hours >= 600 && hours < 1130){
        returnDate = [@"上午" stringByAppendingString:dateStr];
    }else if (hours >= 1131 && hours <1230 ){
        returnDate = [@"中午" stringByAppendingString:dateStr];
    }else if (hours >= 1231 && hours < 1800){
        returnDate = [@"下午" stringByAppendingString:dateStr];
    }else if (hours >= 1801 && hours <= 2400){
        returnDate = [@"晚上" stringByAppendingString:dateStr];
    }
    return returnDate;
}

iOS开发-你想要的时间格式

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