通过UIButton的Hidden属性隐藏,估计没有比这更简单的了

-(UIButton *)createBarBtnItemWithTitle:(NSString *)title imageName:(NSString *)imageName isLeft:(BOOL)isLeft target:(id)target aSelector:(SEL)aSelector isHidden:(BOOL)isHidden{
  if (!isLeft) {
    
    if (imageName) {
        UIButton *rightBtn = [UIButton buttonWithType:UIButtonTypeCustom];
        rightBtn.frame = CGRectMake(0, 0, 30, 30);
        rightBtn.exclusiveTouch = YES;
        UIImage * image = [UIImage imageNamed:imageName];
        [rightBtn setImage:image forState:UIControlStateNormal];
        //    [rightBtn setImageEdgeInsets:UIEdgeInsetsMake(0, -10, 0, 10)];
        [rightBtn addTarget:target action:aSelector forControlEvents:UIControlEventTouchUpInside];
        
        rightBtn.titleLabel.text = imageName;//执行点击动作时做判断条件
        rightBtn.tag = kTAG_BTN_RightItem;
        rightBtn.hidden = isHidden;
        UIBarButtonItem *rightItem = [[UIBarButtonItem alloc]initWithCustomView:rightBtn];
        self.navigationItem.rightBarButtonItem = rightItem;
        return rightBtn;
    }else{
        CGSize titleSize = [self sizeWithText:title fontSize:15 maxWidth:kSCREEN_WIDTH];
        //            DDLog(@"size %@",NSStringFromCGSize(titleSize));
        
        
        UIButton *rightBtn = [UIButton buttonWithType:UIButtonTypeCustom];
        if (title.length <= 2) {
            titleSize.width = 35;
        }else{
            rightBtn.titleLabel.adjustsFontSizeToFitWidth = YES;
            rightBtn.titleLabel.minimumScaleFactor = 1;
        }
        
        rightBtn.frame = CGRectMake(0, 0, titleSize.width, 30);
        rightBtn.titleEdgeInsets = UIEdgeInsetsMake(-10, -20, -10, -20);
        rightBtn.exclusiveTouch = YES;
        
        [rightBtn setTitle:title forState:UIControlStateNormal];
        [rightBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        rightBtn.titleLabel.font = [UIFont systemFontOfSize:16];
        //    [rightBtn setImageEdgeInsets:UIEdgeInsetsMake(0, -10, 0, 10)];
        rightBtn.tag = kTAG_BTN_RightItem;
        rightBtn.hidden = isHidden;
        
        [rightBtn addTarget:target action:aSelector forControlEvents:UIControlEventTouchUpInside];
        
        UIBarButtonItem *rightItem = [[UIBarButtonItem alloc]initWithCustomView:rightBtn];
        self.navigationItem.rightBarButtonItem = rightItem;
        return rightBtn;
        
    }
    
}else{
    
    if (imageName) {
        UIButton *backBtn = [UIButton buttonWithType:UIButtonTypeCustom];
        backBtn.frame = CGRectMake(0, 0, 30, 30);
        backBtn.exclusiveTouch = YES;
        UIImage * image = [UIImage imageNamed:imageName];
        [backBtn setImage:image forState:UIControlStateNormal];
        //    [leftBtn setImageEdgeInsets:UIEdgeInsetsMake(0, -10, 0, 10)];
        [backBtn addTarget:target action:aSelector forControlEvents:UIControlEventTouchUpInside];
        
        backBtn.titleLabel.text = imageName;//执行点击动作时做判断条件
        backBtn.tag = kTAG_BTN_BackItem;
        backBtn.hidden = isHidden;
        
        UIBarButtonItem *backBtnItem = [[UIBarButtonItem alloc]initWithCustomView:backBtn];
        self.navigationItem.leftBarButtonItem = backBtnItem;
        return backBtn;
        
    }else{
        
        if (!title) {
            CGSize iconSize = CGSizeMake(18, 29);
            iconSize = CGSizeMake(32, 32);
            
            CGSize btnSize = CGSizeMake(30, 30);
            
            UIButton *backBtn = [UIButton buttonWithType:UIButtonTypeCustom];
            backBtn.frame = CGRectMake(0, 0, btnSize.width, btnSize.height);
            [backBtn setImage:[UIImage imageNamed:@"img_btnBack.png"] forState:UIControlStateNormal];
            [backBtn setImageEdgeInsets:UIEdgeInsetsMake((btnSize.height - iconSize.height)/2.0, (btnSize.width - iconSize.width)/2.0, (btnSize.height - iconSize.height)/2.0, (btnSize.width - iconSize.width)/2.0)];
            
            [backBtn addTarget:target action:aSelector forControlEvents:UIControlEventTouchUpInside];
            backBtn.tag = kTAG_BTN_BackItem;
            backBtn.hidden = isHidden;

            UIBarButtonItem *leftItem = [[UIBarButtonItem alloc]initWithCustomView:backBtn];
            self.navigationItem.leftBarButtonItem = leftItem;
            return backBtn;
        }else{
            UIButton *backBtn = [UIButton buttonWithType:UIButtonTypeCustom];
            backBtn.frame = CGRectMake(0, 0, 30, 30);
            [backBtn setImage:nil forState :UIControlStateNormal];
            [backBtn setTitle:title forState:UIControlStateNormal];
            [backBtn addTarget:target action:aSelector forControlEvents:UIControlEventTouchUpInside];
            backBtn.tag = kTAG_BTN_BackItem;
            backBtn.hidden = isHidden;
            
            UIBarButtonItem *backBtnItem = [[UIBarButtonItem alloc] initWithCustomView:backBtn];
            [backBtn addTarget:target action:aSelector forControlEvents:UIControlEventTouchUpInside];
            self.navigationItem.leftBarButtonItem = backBtnItem;
            return backBtn;
            
        }
    }
}
}