封装的.h文件

//  UIBarItem+YD.h
//  powerMall
//
//  Created by mac on 2018/7/16.
//  Copyright © 2018年 taisheng. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface UIBarItem (YD)
//封装导航图片按钮
+(UIBarButtonItem *)itemWithImageName:(NSString *)imageName HighImageName:(NSString *)highImageName target:(id)target action:(SEL)action type:(int)type;
//封装导航文字按钮
+(UIBarButtonItem *)itemWithTitleName:(NSString *)titleName HighTitleName:(NSString *)highTitleName target:(id)target action:(SEL)action;
@end

封装的.m文件

//  UIBarItem+YD.m
//  powerMall
//
//  Created by mac on 2018/7/16.
//  Copyright © 2018年 taisheng. All rights reserved.
//

#import "UIBarItem+YD.h"
#define AdaptedWidth(x)  ceilf((x) * kScreenWidthRatio)
@implementation UIBarItem (YD)
+(UIBarButtonItem *)itemWithImageName:(NSString *)imageName HighImageName:(NSString *)highImageName target:(id)target action:(SEL)action type:(int)type{
    UIButton *button=[UIButton buttonWithType:UIButtonTypeCustom];
    [button setImage:[UIImage imageNamed:imageName] forState:UIControlStateNormal];
    //type=1右导航按钮，否则为左导航按钮
    if (type ==1) {
        button.frame =CGRectMake(15, 5, 30, 30);
    }else{
        button.frame =CGRectMake(0, 10, 20, 20);
    }
    
    button.imageView.contentMode=UIViewContentModeScaleAspectFit;
    [button addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
    button.adjustsImageWhenHighlighted=NO;
    //修改方法
    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
    [view addSubview:button];
    return [[UIBarButtonItem alloc]initWithCustomView:view];
    
}
+(UIBarButtonItem *)itemWithTitleName:(NSString *)titleName HighTitleName:(NSString *)highTitleName target:(id)target action:(SEL)action{
    //导航栏按钮
    UIButton * Button=[UIButton buttonWithType:UIButtonTypeCustom];
    Button.titleLabel.font=[UIFont systemFontOfSize:17];
    Button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;
    [Button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [Button setTitle:titleName forState:UIControlStateNormal];
    [Button setTitle:highTitleName forState:UIControlStateHighlighted];
    //按钮的大小为当前按钮的大小
    Button.frame = CGRectMake(0, 0, 44, 44);
    [Button addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
    return [[UIBarButtonItem alloc]initWithCustomView:Button];
}
@end