.m
#import "Constant.h"

@implementation Constant

@synthesize fontSize,font;
@synthesize fontName,textViewLimitedCharNumber;

-(id)init {

    self.fontSize = 40;
    //self.fontName = @"freestyle script";
    self.fontName = @"snellroundhand script";
    self.font = [UIFont fontWithName:[self fontName] size:[self fontSize]];
    self.textViewLimitedCharNumber = 45;
    return self;
}

@end

-----
.h
#import <Foundation/Foundation.h>

@interface Constant : NSObject


@property (nonatomic) int fontSize;
@property (nonatomic) int textViewLimitedCharNumber;
@property (nonatomic) NSString *fontName;
@property (nonatomic) UIFont *font;

@end

-----
using
Constant *appConstant = [[Constant alloc]init];
    mytextview.font = appConstant.font;