时间转换，自适应文字高度，手机和邮箱验证

来源：互联网发布：mp3编辑软件编辑：程序博客网时间：2024/04/30 08:06

+ (NSString *) dateStringFromNumberString:(NSString *)str{
    NSDate *date=[NSDate dateWithTimeIntervalSince1970:[str doubleValue]/1000];
    NSDateFormatter *fm=[[NSDateFormatter alloc]init];
    fm.dateFormat=@"yyyy-MM-dd HH:mm:ss";
    return [fm stringFromDate:date];
}

+ (double) getTimeStamepWithEndTime:(NSString *)finishtime {
    NSDateFormatter *fm=[[NSDateFormatter alloc]init];
    fm.dateFormat=@"yyyy-MM-dd HH:mm:ss";
    NSDate *finishDate = [Helper dateFromTimeStr:finishtime];
    NSTimeInterval time = [finishDate timeIntervalSinceDate:[NSDate date]];
    return time;
}

+ (NSDate *)dateFromTimeStr:(NSString *)timeStr{
    NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
    [formatter setLocale:[NSLocale currentLocale]];
    formatter.dateFormat = @"yyyy-MM-dd HH:mm:ss";
    NSDate *date = [formatter dateFromString:timeStr];
    return date;
}

+ (NSString *) dateStringFromString:(NSString *)str{
    NSDate *date=[NSDate dateWithTimeIntervalSince1970:[str doubleValue]/1000];
    NSDateFormatter *fm=[[NSDateFormatter alloc]init];
    fm.dateFormat=@"yyyy-MM-dd";
    return [fm stringFromDate:date];
}

+ (NSString *)fullDateStringFromNumberString:(NSString *)str{
    NSDate *date=[NSDate dateWithTimeIntervalSince1970:[str doubleValue]/1000];
    NSDateFormatter *fm=[[NSDateFormatter alloc]init];
    fm.dateFormat=@"yyyy-MM-dd HH:mm";
    return [fm stringFromDate:date];
}

+ (CGFloat) textHeightFromString:(NSString *)textStr width:(CGFloat)width fontsize:(CGFloat)Size{
    //最好判断一下SDK 的版本
    //下面的方法是ios7 的
    /**
     * 根据字符串的内容和固定的宽度来求高度
     @param size 给一个预设的大小宽度写成固定的高度写成float 的最大值
     @param option 第二哥参数用于设置是否以段为基准不以base line 为准
     第三个参数对文字进行设置
     @return 真实的大小
     */
    float dev=[[[UIDevice currentDevice]systemVersion]floatValue];
    if (dev>=7.0) {
        NSDictionary *dict=@{
                             NSFontAttributeName: [UIFont systemFontOfSize:Size]
                             };

        CGRect frame=[textStr boundingRectWithSize:CGSizeMake(width, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading|NSStringDrawingTruncatesLastVisibleLine attributes:dict context:nil];
        return frame.size.height;

    }else{
        CGSize size=[textStr sizeWithFont:[UIFont systemFontOfSize:Size] constrainedToSize:CGSizeMake(width, CGFLOAT_MAX) lineBreakMode:NSLineBreakByCharWrapping];
        return size.height;
    }

}

//手机号码验证
+ (BOOL) validateMobile:(NSString *)mobile
{
    //手机号以13， 15，18开头，八个 \d 数字字符
    NSString *phoneRegex = @"^((13[0-9])|(15[^4,\\D])|(18[0,0-9])|(17[0,0-9]))\\d{8}$";
    NSPredicate *phoneTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",phoneRegex];

    return [phoneTest evaluateWithObject:mobile];
}

//邮箱验证
+ (BOOL) isValidateEmail:(NSString *)email {

    NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";

    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];

    return [emailTest evaluateWithObject:email];

}

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