UINavigationController返回按钮不带文子，自定义图片

有时候，app要统一风格，对于没有特别要求的地方，采用自定义默认的样式。下面是本人自己的样式，有其他需求的自己试着去改一改。

1、先看一下特殊样式

title为图片，左右item都自定义

因为这个需求只是在某些界面才会用，所以，下面的代码是放在ViewController中的

    //title
    UIView* titleView = [[UIView alloc]initWithFrame:CGRectMake(0, 14, 80, 16)];
    UIImageView *titleImg_view = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"personal_headerImg0"]];//HomePageImg_bar_title
    [titleView addSubview:titleImg_view];
    self.navigationItem.titleView = titleView;

    //left
    UIButton *leftItem = [[UIButton alloc] initWithFrame:CGRectMake(0, 0,32, 32)];
    UIImage *imageleft = [UIImage imageNamed:@"HomePageImg_bar_left"];//
    [leftItem setBackgroundImage:imageleft forState:UIControlStateNormal];
    [leftItem addTarget:self action:@selector(leftClickAction) forControlEvents:UIControlEventTouchUpInside];
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:leftItem];
    
    //right
    UIButton *rightItem = [[UIButton alloc] initWithFrame:CGRectMake(0, 0,18, 18)];
    
    UIImage *imageRight = [UIImage imageNamed:@"HomePageImg_bar_right"];//
    [rightItem setBackgroundImage:imageRight forState:UIControlStateNormal];
    [rightItem addTarget:self action:@selector(rightClickAction) forControlEvents:UIControlEventTouchUpInside];
    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:rightItem];

2、统一样式

一般的二级界面样式

这个样式是整个app中的基本样式，为了不在每一个ViewController中进行设置，所以建了一个BaseNavigationControlle继承 UINavigationController
BaseNavigationControlle.m

#import "BaseNavigationController.h"

@interface BaseNavigationController ()

@end

@implementation BaseNavigationController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view. @"bracket_left_black"
  
    
    //整个导航栏的颜色
    [self.navigationBar setBarTintColor:[UIColor whiteColor]];
    //所有按钮文字的颜色
    [self.navigationBar setTintColor:[UIColor colorWithHexString:@"333333"]];
    //title文字颜色
    [self.navigationBar setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor colorWithHexString:@"333333"],NSFontAttributeName:[UIFont systemFontOfSize:16]}];

}

#pragma mark - 重载父类进行改写
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    //先进入子Controller
    [super pushViewController:viewController animated:animated];
    
    //替换掉leftBarButtonItem
    if (viewController.navigationItem.leftBarButtonItem== nil && [self.viewControllers count] > 1) {
        viewController.navigationItem.leftBarButtonItems =[self customLeftBackButton];
    }
}

#pragma mark - 自定义返回按钮图片
-(NSArray*)customLeftBackButton{
    
    UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
   
    backButton.frame = CGRectMake(0, 0, 40, 16);
    
//    UIImage *image = [UIImage imageCompressForWidth:[UIImage imageNamed:@"bracket_left_black"] targetWidth:18];
    
    UIImage *image = [UIImage imageNamed:@"bracket_left_black"];
  
    [backButton setImage:image forState:UIControlStateNormal];
    
    backButton.imageView.contentMode = UIViewContentModeScaleAspectFit;
    
    [backButton addTarget:self
                   action:@selector(popAction)
         forControlEvents:UIControlEventTouchUpInside];
    
    UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];

    
    UIBarButtonItem *negativeSeperator = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
    
    negativeSeperator.width = -20;
    
    // 注意下面这个顺序不要写错了，写错了顺序会导致写不出我们想要的效果
 
    return [NSArray arrayWithObjects:negativeSeperator,backItem,nil];
}

#pragma mark - 返回按钮事件
-(void)popAction
{
    [self popViewControllerAnimated:YES];
}

@end