时间转换，自适应文字高度，手机和邮箱验证

+ (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];

}